BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Vincent Van Hemelryck (KU Leuven) DTSTART:20211110T150000Z DTEND:20211110T160000Z DTSTAMP:20260422T225701Z UID:AnLy/1 DESCRIPTION:Title: Sca le-separated AdS4 vacua of IIA orientifolds and M-theory\nby Vincent V an Hemelryck (KU Leuven) as part of AnLy Strings and Fields online seminar s\n\n\nAbstract\nObtaining string compactifications where the KK scale is much higher than the cosmological constant scale is quite challenging. Suc h a separation of scales is however necessary for the theory to be genuine ly lower-dimensional. In massive type IIA string theory there are such sca le-separated vacua\, e.g. the DGKT AdS4 solutions. It has been shown recen tly that the classical orientifold backreaction in these vacua can be tune d small. In this talk\, I show that massless IIA on the other hand allows both weakly and strongly coupled AdS4 vacua that exhibit scale separation and for which the backreaction can be tuned small as well. I will give evi dence that the strongly coupled solutions can be lifted to scale separated and sourceless (but classically singular) geometries in 11D supergravity. \n LOCATION:https://researchseminars.org/talk/AnLy/1/ END:VEVENT BEGIN:VEVENT SUMMARY:Giuseppe Dibitetto (Padua U.) DTSTART:20211124T150000Z DTEND:20211124T160000Z DTSTAMP:20260422T225701Z UID:AnLy/2 DESCRIPTION:Title: Non -perturbative instability of mIIA on AdS_4 x S^6\nby Giuseppe Dibitett o (Padua U.) as part of AnLy Strings and Fields online seminars\n\n\nAbstr act\nI will start by reviewing the physics of KK bubbles and their higher- dimensional generalizations. Secondly\, I will move to discussing slightly more general situations where the shrinking modulus is the string couplin g. Subsequently\, I will focus on cases where a Freund-Rubin flux is prese nt\, thus leading to the necessity of introducing a source. Finally\, I wi ll discuss the case of massive IIA on a 6-sphere as an explicit realizatio n of the aforementioned mechanism and provide an appropriate physical inte rpretation.\n LOCATION:https://researchseminars.org/talk/AnLy/2/ END:VEVENT BEGIN:VEVENT SUMMARY:Ivonne Zavala (Swansea U.) DTSTART:20211208T150000Z DTEND:20211208T160000Z DTSTAMP:20260422T225701Z UID:AnLy/3 DESCRIPTION:Title: Mul tifield inflation in string theory and supergravity\nby Ivonne Zavala (Swansea U.) as part of AnLy Strings and Fields online seminars\n\n\nAbstr act\nMultifield inflation arises naturally in supergravity and string theo ry models. When several scalars are active during inflation\, the eta-prob lem may be circumvented\, while new trajectories with large turns can aris e\, with interesting observational consequences. I will discuss the prosp ects of realising these features in supergravity and string theory models of inflation.\n LOCATION:https://researchseminars.org/talk/AnLy/3/ END:VEVENT BEGIN:VEVENT SUMMARY:Edgar Shaghoulian (Cornell U.) DTSTART:20220112T150000Z DTEND:20220112T160000Z DTSTAMP:20260422T225701Z UID:AnLy/4 DESCRIPTION:Title: The central dogma and cosmological horizons\nby Edgar Shaghoulian (Cornel l U.) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nTh e central dogma of black hole physics – which says that from the outside a black hole can be described in terms of a quantum system with exp(Area/ 4G) states evolving unitarily – has recently been supported by computati ons indicating that the interior of the black hole is encoded in the Hawki ng radiation of the exterior. In this paper\, we probe whether such a dogm a for cosmological horizons has any support from similar computations. The fact that the de Sitter bifurcation surface is a minimax surface (instead of a maximin surface) causes problems with this interpretation when tryin g to import calculations analogous to the AdS case. This suggests anchorin g extremal surfaces to the horizon itself\, where we formulate a two-sided extremization prescription and find answers consistent with general expec tations for a quantum theory of de Sitter space: vanishing total entropy\, an entropy of A/4G when restricting to a single static patch\, an entropy of a subregion of the horizon which grows with the region size and threat ens the central dogma until an island-like transition at half the horizon size when the entanglement wedge becomes the entire static patch interior\ , and a de Sitter version of the Hartman-Maldacena transition.\n LOCATION:https://researchseminars.org/talk/AnLy/4/ END:VEVENT BEGIN:VEVENT SUMMARY:Francesc Cunillera (U. Nottingham) DTSTART:20220209T150000Z DTEND:20220209T160000Z DTSTAMP:20260422T225701Z UID:AnLy/5 DESCRIPTION:Title: Qui ntessence and the Swampland: tales of parametric and numerical control \nby Francesc Cunillera (U. Nottingham) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nWe provide a detailed discussion of the ma in theoretical and phenomenological challenges of quintessence model build ing in any parametric or numerically controlled regime of the moduli space of string theory. We argue that a working quintessence model requires a l eading order non-supersymmetric (near) Minkowski vacuum with an axionic fl at direction away from the boundary of moduli space. This axion\, when lif ted by subdominant non-perturbative effects\, could drive hilltop quintess ence only for very tuned initial conditions and a very low inflationary sc ale.\nOur analysis has a twofold implication: (1) Scenarios which are in a greement with the swampland dS conjecture\, like AdS and supersymmetric Mi nkowski vacua\, as well as runaways\, cannot allow for phenomenologically viable quintessence with full computational control. This raises doubts on the validity of the swampland dS conjecture since it would imply a strong tension between quantum gravity and observations. (2) If data will prefer dynamical dark energy\, axion models based on misalignment mechanisms loo k more promising than hilltop scenarios which are very contrived.\n LOCATION:https://researchseminars.org/talk/AnLy/5/ END:VEVENT BEGIN:VEVENT SUMMARY:Daniel Junghans (Harvard U.) DTSTART:20220302T150000Z DTEND:20220302T160000Z DTSTAMP:20260422T225701Z UID:AnLy/6 DESCRIPTION:Title: (Ca ncelled) Corrections to the LARGE-Volume Scenario\nby Daniel Junghans (Harvard U.) as part of AnLy Strings and Fields online seminars\n\n\nAbstr act\nWe argue that de Sitter vacua in the LARGE-volume scenario of type II B string theory are vulnerable to various unsuppressed curvature\, warping and g_s corrections. We discuss how these corrections affect the moduli v evs\, the vacuum energy and the moduli masses. Our analysis reveals that t he corrections are parametrically larger in the relevant expressions than one might have guessed from their suppression in the off-shell potential. Some corrections appear without any parametric suppression at all\, which makes them particularly dangerous for candidate de Sitter vacua. Other typ es of corrections can in principle be made small for appropriate parameter choices. However\, we show in an explicit model that this is never possib le for all corrections at the same time when the vacuum energy is positive .\n LOCATION:https://researchseminars.org/talk/AnLy/6/ END:VEVENT BEGIN:VEVENT SUMMARY:Marios Petropoulos (Ecole Polytechnique\, CPHT) DTSTART:20220330T140000Z DTEND:20220330T150000Z DTSTAMP:20260422T225701Z UID:AnLy/7 DESCRIPTION:Title: Car rollian fluids and Chthonian versus celestial holography\nby Marios Pe tropoulos (Ecole Polytechnique\, CPHT) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nThe usual approach of fluid/gravity corresp ondence coincides with solving Einstein's equations in a generalized "inco mplete Newman-Unti gauge". In this framework\, the asymptotic symmetry gro up is bigger and accounts for the boundary-fluid hydrodynamic frame invari ance. The latter pattern holds both for Einstein and Ricci-flat spacetimes \, dual to relativistic and Carrollian fluids\, respectively. This is a co ncrete starting point for approaching flat holography and understanding th e role of the BMS group on the dual boundary theory. It suggests that the latter might be non-local in order to account for the infinite Chthonian d egrees of freedom\, as opposed to the celestial proposal.\n LOCATION:https://researchseminars.org/talk/AnLy/7/ END:VEVENT BEGIN:VEVENT SUMMARY:Joseph Conlon (Oxford U.) DTSTART:20220316T151500Z DTEND:20220316T161500Z DTSTAMP:20260422T225701Z UID:AnLy/8 DESCRIPTION:Title: Hol ographic Questions About Moduli Stabilisation\nby Joseph Conlon (Oxfor d U.) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nMo duli stabilisation is an important and fundamental question in string theo ry as it is a precursor to constructing semi-realistic string vacua. I des cribe work over the last few years aiming at examining moduli stabilised v acua from a holographic perspective\, studying in particular LVS in IIB an d DGKT in IIA. In scale separated limits of large volumes and weak couplin g\, the conformal dimensions of dual operators approach fixed values that are independent of fluxes and many other microscopic aspects of the constr uctions. A further intriguing property is the existence of integer conform al dimensions for DGKT vacua\, although the origin of these integers is my sterious.\n LOCATION:https://researchseminars.org/talk/AnLy/8/ END:VEVENT BEGIN:VEVENT SUMMARY:Gianguido Dall'Agata (Padua U.) DTSTART:20220413T140000Z DTEND:20220413T150000Z DTSTAMP:20260422T225701Z UID:AnLy/9 DESCRIPTION:Title: Sup ergravity and the weak gravity conjecture\nby Gianguido Dall'Agata (Pa dua U.) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\n I will show how the weak gravity conjecture applied to 4-dimensional super gravity theories can be very powerful in constraining which models can be realistically obtained as low-energy effective theories of string theory. In particular\, I will discuss how we can obtain rather general and strong constraints on scale separation between the lower and higher dimensional theory and how most models with positive energy critical points cannot hav e a consistent string theory origin.\n LOCATION:https://researchseminars.org/talk/AnLy/9/ END:VEVENT BEGIN:VEVENT SUMMARY:Erik Plauschinn (Utrecht U.) DTSTART:20220511T140000Z DTEND:20220511T150000Z DTSTAMP:20260422T225701Z UID:AnLy/10 DESCRIPTION:Title: Th e tadpole conjecture in asymptotic limits\nby Erik Plauschinn (Utrecht U.) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nSup erstring theory is defined in ten space-time dimensions. In order to conne ct it to physics in four dimensions one typically has to compactify the th eory and satisfy a number consistency conditions. One of them is the tadpo le cancellation condition. Recently\, Bena\, Blabäck\, Grana\, and Lüst made a "tadpole conjecture" which - if true - would imply that many naivel y-allowed (flux-)compactifications are inconsistent. \nIn the first part o f the talk I will explain and illustrate the tadpole conjecture. In the se cond part I present arguments towards a proof of the conjecture in asympto tic limits using the framework of asymptotic Hodge theory.\n LOCATION:https://researchseminars.org/talk/AnLy/10/ END:VEVENT BEGIN:VEVENT SUMMARY:Romain Ruzziconi (TU Wien) DTSTART:20220525T140000Z DTEND:20220525T150000Z DTSTAMP:20260422T225701Z UID:AnLy/11 DESCRIPTION:Title: A Carrollian Perspective on Celestial Holography\nby Romain Ruzziconi (T U Wien) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\n I will present a holographic description of gravity in 4d asymptotically f lat spacetime in terms of a 3d sourced conformal Carrollian field theory. The external sources encode the leaks of gravitational radiation at null i nfinity. The Ward identities of this theory are shown to reproduce those o f the 2d celestial CFT after relating Carrollian to celestial operators. T his suggests a new set of interplays between gravity in asymptotically fla t spacetime\, sourced conformal Carrollian field theory and celestial CFT. \n\n\nBased on: https://arxiv.org/abs/2202.04702\n LOCATION:https://researchseminars.org/talk/AnLy/11/ END:VEVENT BEGIN:VEVENT SUMMARY:Michela Petrini (LPTHE Paris) DTSTART:20220608T140000Z DTEND:20220608T150000Z DTSTAMP:20260422T225701Z UID:AnLy/12 DESCRIPTION:Title: A systematic approach to consistent truncations\nby Michela Petrini (LPT HE Paris) as part of AnLy Strings and Fields online seminars\n\n\nAbstract \nIn this talk I will discuss how generalised geometry provides a systemat ic way to construct and classify consistent truncations to different dimen sions and with different amount of supersymmetry. As an example I will app ly this formalism to the classification of N=2 gauged supergravity in 5 fi ve dimensions that can be obtained as consistent truncations of type IIB o r M theory.\n LOCATION:https://researchseminars.org/talk/AnLy/12/ END:VEVENT BEGIN:VEVENT SUMMARY:Oscar Loaiza-Brito (Guanajuato U.) DTSTART:20220622T140000Z DTEND:20220622T150000Z DTSTAMP:20260422T225701Z UID:AnLy/13 DESCRIPTION:Title: Ad S and dS vacua from torsion and non-BPS states\nby Oscar Loaiza-Brito (Guanajuato U.) as part of AnLy Strings and Fields online seminars\n\n\nAb stract\nWe look for minimal conditions to construct stable Anti de Sitter and de Sitter vacua from type IIB String theory compactification on Kähle r manifolds with torsion in the presence of O3-planes. This allows contrib utions to the scalar potential from the five-form flux and from D5-branes wrapping torsional cycles -interpreted as non-BPS states carrying discrete Z_2 charge and classified by K-theory- which in turn leads to the constru ction of AdS and dS vacua respectively. We shall discuss some constraints on the configuration as well as possible sources of instabilities.\n LOCATION:https://researchseminars.org/talk/AnLy/13/ END:VEVENT BEGIN:VEVENT SUMMARY:Claude Duhr (Bonn U.) DTSTART:20221005T140000Z DTEND:20221005T150000Z DTSTAMP:20260422T225701Z UID:AnLy/14 DESCRIPTION:Title: 2D fishnet integrals and Calabi-Yau geometries\nby Claude Duhr (Bonn U.) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nWe argu e that Yangian-invariant l-loop fishnet integrals in 2 dimensions are clos ely related to a family of Calabi-Yau l-folds. This allows us to reduce th e computation of these integrals to the computation of the Calabi-Yau peri ods. The periods are solutions of the Picard-Fuchs differential equations\ , which in turn are determined by the Yangian symmetry. Finally\, we show that the values of these fishnet integrals admit a natural interpretation as the quantum volume of the Calabi-Yau.\n LOCATION:https://researchseminars.org/talk/AnLy/14/ END:VEVENT BEGIN:VEVENT SUMMARY:Jean-Luc Lehners (Postdam\, MPI) DTSTART:20221019T140000Z DTEND:20221019T150000Z DTSTAMP:20260422T225701Z UID:AnLy/15 DESCRIPTION:Title: Ho w to create universes with internal flux\nby Jean-Luc Lehners (Postdam \, MPI) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\n String compactifications typically require fluxes\, for example in order t o stabilise moduli. Such fluxes\, when they thread internal dimensions\, a re topological in nature and take on quantised values. This poses the puzz le as to how they could arise in the early universe\, as they cannot be tu rned on incrementally. Working with string inspired models in 6 and 8 dime nsions\, we show that there exist no-boundary solutions in which internal fluxes are present from the creation of the universe onwards. The no-bound ary proposal can thus explain the origin of fluxes in a Kaluza-Klein conte xt. In fact\, it acts as a selection principle since no-boundary solutions are only found to exist when the fluxes have the right magnitude to lead to an effective potential that is positive and flat enough for accelerated expansion. Within the range of selected fluxes\, the no-boundary wave fun ction assigns higher probability to smaller values of flux. Our models ill ustrate how cosmology can act as a filter on a landscape of possible highe r-dimensional solutions.\n LOCATION:https://researchseminars.org/talk/AnLy/15/ END:VEVENT BEGIN:VEVENT SUMMARY:Shai Chester (Weizmann Inst.) DTSTART:20221109T150000Z DTEND:20221109T160000Z DTSTAMP:20260422T225701Z UID:AnLy/16 DESCRIPTION:Title: Pu re supergravity and the conformal bootstrap\nby Shai Chester (Weizmann Inst.) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\n We consider graviton scattering in maximal supergravity on Anti-de Sitter space (AdS) in d+1 dimensions for d=3\, 4\, and 6 with no extra compact sp acetime factor. Holography suggests that this theory is dual to an exotic maximally supersymmetric conformal field theory (CFT) in d dimensions whos e only light single trace operator is the stress tensor. This contrasts wi th more standard cases like Type IIB string theory on AdS_5x S^5 dual to N =4 Super-Yang-Mills\, where the CFT has light single trace operators for e ach Kaluza-Klein mode on S^5. We compute the 1-loop correction to the pure AdS_{d+1} theory in a small Planck length expansion\, which is dual to th e large central charge expansion in the CFT. We find that this correction saturates the most general non-perturbative conformal bootstrap bounds on this correlator in the large central charge regime for d=3\, 4\, 6. After imposing theory-specific constraints from localization in d=3\, 4\, the bo otstrap constraints strengthen and are then saturated by the string/M-theo ry dual CFT data.\n LOCATION:https://researchseminars.org/talk/AnLy/16/ END:VEVENT BEGIN:VEVENT SUMMARY:Bruno Valeixo Bento (U. Liverpool (main)) DTSTART:20221123T150000Z DTEND:20221123T160000Z DTSTAMP:20260422T225701Z UID:AnLy/17 DESCRIPTION:Title: Gr avity at the Tip of the Throat\nby Bruno Valeixo Bento (U. Liverpool ( main)) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nW arped throats have been used in countless works in the context of string t heory compactifications\, in particular for their ability to suppress high energy scales. I will focus on the gravitational sector of the resulting 4d EFT\, with its tower of Kaluza-Klein (KK) gravitons. By assuming that w e live on a (3+1)-dimensional brane within the throat\, we can study how t he warping influences the effects of this tower – in particular\, I will show how the tower corrects the Newtonian potential and discuss how gravi tational experiments and observations may be used to test the possibility that our Universe corresponds to a brane living in a warped throat. I will also briefly mention what this means for gravitational wave signatures o riginating from different types of sources within this setup.\n LOCATION:https://researchseminars.org/talk/AnLy/17/ END:VEVENT BEGIN:VEVENT SUMMARY:Thomas Van Riet (Leuven U.) DTSTART:20221214T150000Z DTEND:20221214T160000Z DTSTAMP:20260422T225701Z UID:AnLy/18 DESCRIPTION:Title: A supergravity view on a possible AdS1/CFT0 correspondence\nby Thomas Va n Riet (Leuven U.) as part of AnLy Strings and Fields online seminars\n\n\ nAbstract\nTop down holography relies on a decoupling limit of closed and open strings near the horizon of a stack of D branes. The simplest such ho rizon geometries are of the form of an AdS space times a sphere times a to rus with the total product space being a 10 or 11-dimensional solution of supergravity. I will explain that this picture naturally leads one to cons ider an extreme case which would be AdS1 x S1 x T9 and it would originate from a brane bound state given by the so-called D7 -D instanton system\, w hich is not fully understood in supergravity. I will point out that the du al matrix model seems already written down in the literature before and it is an extension of the IKKT matrix model. I will attempt to be pedagogica l and the talk will mostly reflect the supergravity side of the problem.\n LOCATION:https://researchseminars.org/talk/AnLy/18/ END:VEVENT BEGIN:VEVENT SUMMARY:Eduardo Gonzalo-Badia (Lehigh U.) DTSTART:20230111T150000Z DTEND:20230111T160000Z DTSTAMP:20260422T225701Z UID:AnLy/19 DESCRIPTION:Title: Ty pe IIB flux compactifications with h^{1\,1} = 0\nby Eduardo Gonzalo-Ba dia (Lehigh U.) as part of AnLy Strings and Fields online seminars\n\n\nAb stract\nType IIB flux vacua based on Landau-Ginzburg models without Kähle r deformations provide fully-controlled insights into the non-geometric an d strongly-coupled string landscape. We show here that supersymmetric flux configurations at the Fermat point of the 1^9 model\, which were found lo ng-time ago to saturate the orientifold tadpole\, leave a number of massle ss fields\, which however are not all flat directions of the superpotentia l at higher order. More generally\, the rank of the Hessian of the superpo tential is compatible with a suitably formulated tadpole conjecture for al l fluxes that we found. Moreover\, we describe new infinite families of su persymmetric 4d N = 1 Minkowski and AdS vacua and confront them with sever al other swampland conjectures.\n LOCATION:https://researchseminars.org/talk/AnLy/19/ END:VEVENT BEGIN:VEVENT SUMMARY:Junho Hong (KU Leuven) DTSTART:20230125T150000Z DTEND:20230125T160000Z DTSTAMP:20260422T225701Z UID:AnLy/20 DESCRIPTION:Title: La rge N partition functions\, holography\, and black holes\nby Junho Hon g (KU Leuven) as part of AnLy Strings and Fields online seminars\n\n\nAbst ract\nIn this talk\, I will present a simple closed form expression for th e topologically twisted index of the ABJM theory as a function of the magn etic fluxes and complexified electric chemical potentials valid at fixed k and to all orders in the large N expansion. These results have important implications for holography and the microscopic entropy counting of supers ymmetric static AdS4 black holes. I will also discuss the squashed sphere partition function and the superconformal index of the ABJM theory in a si milar context. Finally\, I will briefly comment on the generalization to o ther N = 2 superconformal field theories.\n LOCATION:https://researchseminars.org/talk/AnLy/20/ END:VEVENT BEGIN:VEVENT SUMMARY:T. Grimm (Utrecht U.) DTSTART:20230222T150000Z DTEND:20230222T160000Z DTSTAMP:20260422T225701Z UID:AnLy/21 DESCRIPTION:Title: Th e Tameness of Quantum Field Theory\nby T. Grimm (Utrecht U.) as part o f AnLy Strings and Fields online seminars\n\n\nAbstract\nIn this talk I wi ll introduce a generalized notion of finiteness and argue that it appears in quantum field theories and in all well-understood string theory effecti ve theories. The underlying mathematical foundation is described by the ta me geometry that is built from o-minimal structures introduced in mathemat ical logic. For renormalizable quantum field theories\, I will give a gene ral proof that amplitudes at each order in the loop expansion are tame fun ctions. I will discuss several exact non-perturbative results and show tha t they are tame but only given constraints on the UV definition of the the ory. I will present new evidence that tameness is linked to a consistent c oupling to quantum gravity. Motivated by these insights\, I will suggest t hat sets of consistent physical theories and their observables can be used to define tame structures. I will make concrete conjectures how this is i mplemented for conformal field theories and comment on some of the implica tions.\n LOCATION:https://researchseminars.org/talk/AnLy/21/ END:VEVENT BEGIN:VEVENT SUMMARY:Yixuan Li (Munich\, Max Planck Inst.) DTSTART:20230308T150000Z DTEND:20230308T160000Z DTSTAMP:20260422T225701Z UID:AnLy/22 DESCRIPTION:Title: Lo cal supersymmetry enhancement and the entropy of three-charge black holes< /a>\nby Yixuan Li (Munich\, Max Planck Inst.) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nIn string theory\, black holes can b e realised as bound states of branes and strings. The branes and the strin gs preserve a set of global supersymmetries\, which imposes the geometry o f the near-horizon region. However\, there exists a whole moduli space of brane systems that preserve those same global supersymmetries\, but whose number of local supersymmetries is enhanced. Such brane configuration shou ld describe some microstates of the black hole\; but how much of the black -hole entropy can these configurations account for? \n\nIn this talk\, I w ill first present this formalism based on local supersymmetries that ident ifies the ingredients needed to describe the microstates of a supersymmetr ic black hole.\nThen\, I will illustrate the local supersymmetry enhanceme nt mechanism with the three-charge F1-NS5-P black hole in Type IIA. The bl ack-hole entropy is accounted by the fractionation\, due to the presence o f the five-branes\, of the fundamental strings into many ‘little strings ’ which act as independent momentum carriers.\nI will apply the supersym metric enhancement mechanism to these brane systems\, and show it gives ri se to a new class of black-hole microstate solutions which preserve the ro tational symmetry of the black-hole horizon. Finally\, I will explain why one could expect their supergravity description to be horizonless in the M -theory frame\, and how our results point towards a change of strategy in the fuzzball programme in the endeavour of constructing horizonless black- hole microstates.\n LOCATION:https://researchseminars.org/talk/AnLy/22/ END:VEVENT BEGIN:VEVENT SUMMARY:Luca Ciambelli (Perimeter Institute) DTSTART:20230322T150000Z DTEND:20230322T160000Z DTSTAMP:20260422T225701Z UID:AnLy/23 DESCRIPTION:Title: Co rner Symmetries in Gravity\nby Luca Ciambelli (Perimeter Institute) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nIn the las t 7 years\, we have gathered a lot of results pointing toward an underlyin g universal symmetry structure in gravity. I will give an overview of thes e recent results\, focussing in particular on two main features. First\, w e will derive the universal corner symmetry algebra\, which can be regarde d as the algebra of observables in classical gravity. Secondly\, we will p ropose an extension of the gravitational covariant phase space such that a ll diffeomorphism charges are integrable\, albeit the system is still diss ipative. These two ingredients are at the core of the corner proposal\, wh ich is a bottom-up approach to quantum gravity\, based on symmetries. Afte r enunciating and discussing this proposal\, time permitting\, I will ment ion how the geometric degrees of freedom at cuts of null hypersurfaces can be quantized\, and its far-reaching consequences for quantum gravity.\n LOCATION:https://researchseminars.org/talk/AnLy/23/ END:VEVENT BEGIN:VEVENT SUMMARY:Sebastian Mizera (Princeton\, Inst. Advanced Study) DTSTART:20230405T140000Z DTEND:20230405T150000Z DTSTAMP:20260422T225701Z UID:AnLy/24 DESCRIPTION:Title: Ev aluating one-loop string amplitudes\nby Sebastian Mizera (Princeton\, Inst. Advanced Study) as part of AnLy Strings and Fields online seminars\n \n\nAbstract\nScattering amplitudes in string theory are written as formal integrals of correlations functions over the moduli space of punctured Ri emann surfaces. It's well-known\, albeit not often emphasized\, that this prescription is only approximately correct because of the ambiguities in d efining the integration domain. In this talk\, we propose a resolution of this problem for one-loop open-string amplitudes and present their first e valuation at finite energy and scattering angle. Our method involves a def ormation of the integration contour over the modular parameter to a fracta l contour introduced by Rademacher in the context of analytic number theor y. This procedure leads to explicit and practical formulas for the one-loo p planar and non-planar type-I superstring four-point amplitudes\, amenabl e to numerical evaluation. We plot the amplitudes as a function of the Man delstam invariants and directly verify long-standing conjectures about the ir behavior at high energies.\n LOCATION:https://researchseminars.org/talk/AnLy/24/ END:VEVENT BEGIN:VEVENT SUMMARY:Max Wiesner (Harvard U.\, CMSA) DTSTART:20230503T140000Z DTEND:20230503T150000Z DTSTAMP:20260422T225701Z UID:AnLy/25 DESCRIPTION:Title: Bo unds on Species Scale and the Distance Conjecture\nby Max Wiesner (Har vard U.\, CMSA) as part of AnLy Strings and Fields online seminars\n\n\nAb stract\nThe species scale serves as a UV cutoff in the gravitational secto r of an EFT and can depend on the moduli of the theory as the spectrum of the theory varies. We argue that the slope of the species scale as a funct ion of massless (or light) modes is bounded by an O(1) coefficient. This b ound is true at all points in moduli space including also its interior. Th e argument is based on the idea that the short distance contribution of ma ssless modes to gravitational terms in the EFT cannot dramatically affect the black hole entropy. Based on string theory arguments we expect the O(1 ) constant in this bound to be equal to 1/d-2 as we approach the boundary of the moduli space. However\, we find that the slope of the species scale can approach its asymptotic value from above as we go from interior point s to the boundaries\, thereby implying that the constant in the bound must be larger than 1/d-2. The bound on the variation of the species scale als o implies that the mass of towers of light modes cannot go to zero faster than exponential in field distance in accordance with the Distance Conject ure.\n LOCATION:https://researchseminars.org/talk/AnLy/25/ END:VEVENT BEGIN:VEVENT SUMMARY:Lorenz Eberhardt (IAS\, Princeton) DTSTART:20230531T140000Z DTEND:20230531T150000Z DTSTAMP:20260422T225701Z UID:AnLy/26 DESCRIPTION:Title: So lving 3d Gravity with Virasoro TQFT\nby Lorenz Eberhardt (IAS\, Prince ton) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nI w ill explain a proposal which relates three-dimensional quantum gravity in AdS3 to a particular 3d TQFT that we refer to as ``Virasoro TQFT''. This r elation gives a precise meaning to the standard folklore that pure 3d grav ity is related to two copies of SL(2\,R) Chern-Simons theory. I will discu ss that replacing SL(2\,R) Chern-Simons theory by Virasoro TQFT solves sev eral known problems in the correspondence. The relation provides a computa tionally useful tool to study partition functions of 3d gravity. The talk is based o\n LOCATION:https://researchseminars.org/talk/AnLy/26/ END:VEVENT BEGIN:VEVENT SUMMARY:Gerben Venken (University of Heidelberg\, ITP) DTSTART:20230517T140000Z DTEND:20230517T150000Z DTSTAMP:20260422T225701Z UID:AnLy/27 DESCRIPTION:Title: Th e impact of alpha' corrections on de Sitter uplifts and warped throats \nby Gerben Venken (University of Heidelberg\, ITP) as part of AnLy String s and Fields online seminars\n\n\nAbstract\nOne of the most often-used pro posals for constructing a de Sitter vacuum in string theory is by upliftin g using a puffed-up anti-D3 brane in a warped throat as done in KKLT and L VS. In recent years there has been much discussion about the validity and control of such constructions\; more broadly\, the question of whether one can obtain controlled de Sitter vacua at all in string theory has come un der close scrutiny. In this talk I will consider puffed-up antibranes in a warped throat and discuss the impact of alpha' corrections to the puffed -up brane worldvolume theory on the dynamics of the brane (specifically th e KPV process)\, what control one has over such corrections and whether su ch correction pose an obstruction to a de Sitter uplift or are actually a blessing in disguise. Based on arXiv:2212.07437.\n LOCATION:https://researchseminars.org/talk/AnLy/27/ END:VEVENT BEGIN:VEVENT SUMMARY:Manki Kim (MIT\, Cambridge\, CTP) DTSTART:20230628T140000Z DTEND:20230628T150000Z DTSTAMP:20260422T225701Z UID:AnLy/28 DESCRIPTION:Title: To wards string loop corrections in Calabi-Yau orientifold compactifications< /a>\nby Manki Kim (MIT\, Cambridge\, CTP) as part of AnLy Strings and Fiel ds online seminars\n\n\nAbstract\nComputation of string loop corrections t o the effective action has been one of the main challenges in string pheno menology. One major complication for such computations is that the string loop corrections are sensitive to the spectrum of strings probing Calabi-Y au orientifolds\, which is practically inaccessible. In this talk\, I will claim that some terms in the string one loop corrections to the Kahler po tential are computed by more computable crude details of the string spectr um. This result may pave a way to explicit computations of the string loop corrections in generic Calabi-Yau orientifold compactifications.\n LOCATION:https://researchseminars.org/talk/AnLy/28/ END:VEVENT BEGIN:VEVENT SUMMARY:Jerome Quintin (U. Waterloo\, Perimeter Inst.) DTSTART:20231004T140000Z DTEND:20231004T150000Z DTSTAMP:20260422T225701Z UID:AnLy/29 DESCRIPTION:Title: Ap plications of the Kontsevich-Segal Bound in Quantum Cosmology\nby Jero me Quintin (U. Waterloo\, Perimeter Inst.) as part of AnLy Strings and Fie lds online seminars\n\n\nAbstract\nKontsevich and Segal have proposed a co nstraint on complex metrics by demanding the path integral of p-form field s to converge on a given fixed background. Witten has conjectured that thi s constraint could apply to quantum gravity path integrals. The consequenc es for quantum cosmology have thus been explored in the last couple of yea rs. I will review some of these recent developments\, including classical and quantum (tunnelling) transitions of the universe. Emphasis will be giv en on the Hartle-Hawking no-boundary proposal\, where it is found that fla tter potentials more easily satisfy the Kontsevich-Segal bound. When takin g into account the weighting of the wave function\, which favours nucleati on at low values on the inflationary potential\, the effects conspire to s uggest that only a minimal amount of inflation could have occurred. This\, in turn\, points towards our universe today being relatively small.\n LOCATION:https://researchseminars.org/talk/AnLy/29/ END:VEVENT BEGIN:VEVENT SUMMARY:Victor Rodriguez (Princeton U.) DTSTART:20231018T140000Z DTEND:20231018T150000Z DTSTAMP:20260422T225701Z UID:AnLy/30 DESCRIPTION:Title: Th e Virasoro minimal string and 2d string cosmology\nby Victor Rodriguez (Princeton U.) as part of AnLy Strings and Fields online seminars\n\n\nAb stract\nI will introduce a new critical string theory in two dimensions an d explain that this theory\, viewed as two-dimensional quantum gravity on the worldsheet\, is equivalent to a double-scaled matrix integral. The wor ldsheet theory consists of Liouville CFT coupled to timelike Liouville CFT . The double-scaled matrix integral has as its leading density of states t he universal Cardy density of primaries in a two-dimensional CFT of centra l charge c\, thus motivating the name Virasoro minimal string. The duality holds for any value of the continuous parameter c and reduces to the JT g ravity/matrix integral duality in the large central charge limit\, providi ng a precise stringy realization of JT gravity. From a target spacetime po int of view\, I will describe how this theory may be viewed as a cosmologi cal background in two dimensions.\n LOCATION:https://researchseminars.org/talk/AnLy/30/ END:VEVENT BEGIN:VEVENT SUMMARY:Andrea Campoleoni (U. Mons) DTSTART:20231108T150000Z DTEND:20231108T160000Z DTSTAMP:20260422T225701Z UID:AnLy/31 DESCRIPTION:Title: Fl at from anti-de Sitter\nby Andrea Campoleoni (U. Mons) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nThe space of solutions of Einstein's equations is severely altered by the presence of a cosmologi cal constant. This is manifest when solving the equations of motion close to the boundary of spacetime. In AdS all information about the solutions i n encoded a metric and an energy-momentum tensor defined on the time-like boundary. On the other hand\, at null infinity the information about the s olutions is encoded in an infinite number of functions\, satisfying suitab le flux-balance laws. In spite of these striking differences\, we show how the space of Ricci-flat manifolds can be recovered from that of Einstein spaces by expanding the AdS boundary energy-momentum in powers of the cosm ological constant. In this process\, the flux-balance laws are also recove red by demanding that the line element remains finite in the limit of vani shing cosmological constant. The analysis is performed in a modified versi on of the Newman-Unti gauge\, that has the additional advantage of natural ly disclosing the Carrollian structures emerging at null infinity.\n LOCATION:https://researchseminars.org/talk/AnLy/31/ END:VEVENT BEGIN:VEVENT SUMMARY:Matthew Kleban (New York U.\, CCPP) DTSTART:20231122T150000Z DTEND:20231122T160000Z DTSTAMP:20260422T225701Z UID:AnLy/32 DESCRIPTION:Title: Ax ion Landscapes in Cosmology and String Theory\nby Matthew Kleban (New York U.\, CCPP) as part of AnLy Strings and Fields online seminars\n\n\nAb stract\nI will review axion landscapes in cosmology and explain their pote ntial for explaining many of the large-scale features of our universe\, in cluding the big bang\, inflation\, dark matter\, and dark energy. These e xplanations can be successful when there are O(100s) of axion fields with random scales and a random charge matrix that is not too sparse. Turning to string theory\, I will describe recent work which numerically sampled t he landscape of axions potentials in Calabi-Yau compactifications of type IIB. While many of these compactifications admit hundreds of axions\, cor relations between the scales and charges result in a meager landscape with few unique minima in any given compactification. These results indicate that explaining these features of our universe may require a more general landscape with varying topology or flux.\n LOCATION:https://researchseminars.org/talk/AnLy/32/ END:VEVENT BEGIN:VEVENT SUMMARY:Nat Levine (ENS\, Paris\, IPM) DTSTART:20231129T150000Z DTEND:20231129T160000Z DTSTAMP:20260422T225701Z UID:AnLy/33 DESCRIPTION:Title: Eq uivalence of 1-loop RG flows in 4d Chern-Simons and integrable 2d sigma-mo dels\nby Nat Levine (ENS\, Paris\, IPM) as part of AnLy Strings and Fi elds online seminars\n\n\nAbstract\nCostello\, Witten and Yamazaki propose d a 4d Chern-Simons theory as a unified way to engineer integrable models. In the presence of 'Disorder' defects (for non-ultralocal 2d theories)\, this correspondence has been established only classically. As a first quan tum check\, I will derive the matching of 1-loop divergences between the 4 d and 2d theories. This study will uncover a simple\, 'universal' structur e for the divergences in the 2d theory. My assumptions are general and see m to isolate sigma-models among the 2d theories. (Based on 2309.16753)\n LOCATION:https://researchseminars.org/talk/AnLy/33/ END:VEVENT BEGIN:VEVENT SUMMARY:Gianluca Inverso (INFN\, Padua) DTSTART:20231213T150000Z DTEND:20231213T160000Z DTSTAMP:20260422T225701Z UID:AnLy/34 DESCRIPTION:Title: 2d gauged maximal supergravities and Kaluza–Klein reductions\nby Gianl uca Inverso (INFN\, Padua) as part of AnLy Strings and Fields online semin ars\n\n\nAbstract\nI will summarise the general framework of consistent Ka luza–Klein truncations from D=11 and type II supergravities to gauged ma ximal supergravities in two dimensions. This makes it possible to describe the complete bosonic dynamics of all D=2 gauged maximal supergravities th at admit a geometric uplift.\nThe construction can be applied in particula r to prove and construct the consistent truncation of eleven-dimensional s upergravity on S8×S1 to D=2 SO(9) gauged supergravity\, relevant for the holographic description of the M-theory/BFSS matrix model.\n LOCATION:https://researchseminars.org/talk/AnLy/34/ END:VEVENT BEGIN:VEVENT SUMMARY:Gwenael Ferrando (IPht\, Saclay) DTSTART:20231220T150000Z DTEND:20231220T160000Z DTSTAMP:20260422T225701Z UID:AnLy/35 DESCRIPTION:Title: A Large Twist Limit for Any Operator in N=4 SYM\nby Gwenael Ferrando (IP ht\, Saclay) as part of AnLy Strings and Fields online seminars\n\n\nAbstr act\nThe fishnet theory was obtained as a strongly twisted\, weakly couple d limit of N=4 SYM. Though still non-trivial\, it is much simpler than the original N=4 SYM theory. The appearance of integrability is better unders tood\, and the holographic dual was constructed from first principles. Bot h can be tied to the existence of an iterative structure for some of the c orrelators. However\, most of the operators of the original theory are now protected. We argue that it is possible to devise a double-scaling limit for any single-trace operator in N=4 SYM. Generically\, this involves some type of mixing with other operators. We also prove integrability for all the examples that we study. This work opens the door to a systematic expan sion of N=4 SYM around the large-twist limit.\n LOCATION:https://researchseminars.org/talk/AnLy/35/ END:VEVENT BEGIN:VEVENT SUMMARY:Fernando Marchesano (IFT\, Madrid) DTSTART:20240207T150000Z DTEND:20240207T160000Z DTSTAMP:20260422T225701Z UID:AnLy/37 DESCRIPTION:Title: On the moduli space curvature at infinity\nby Fernando Marchesano (IFT\, Madrid) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\ nWe analyse the scalar curvature of the vector multiplet moduli space M(VM \,X) of type IIA string theory compactified on a Calabi--Yau manifold X. W hile the volume of M(VM\,X) is known to be finite\, cases have been found where the scalar curvature diverges positively along trajectories of infin ite distance. We classify the asymptotic behaviour of the scalar curvature for all large volume limits within M(VM\,X)\, for any choice of X\, and p rovide the source of the divergence both in geometric and physical terms. Geometrically\, there are effective divisors whose volumes do not vary alo ng the limit. Physically\, the EFT subsector associated to such divisors i s decoupled from gravity along the limit\, and defines a rigid N=2 field t heory with a non-vanishing moduli space curvature $R_{rigid}$. We propose that the relation between scalar curvature divergences and field theories that can be decoupled from gravity is a common trait of moduli spaces comp atible with quantum gravity.\n LOCATION:https://researchseminars.org/talk/AnLy/37/ END:VEVENT BEGIN:VEVENT SUMMARY:Vincent Menet (Paris\, LPTHE) DTSTART:20240117T150000Z DTEND:20240117T160000Z DTSTAMP:20260422T225701Z UID:AnLy/38 DESCRIPTION:Title: Ne w non-supersymmetric flux vacua from generalised calibrations\nby Vinc ent Menet (Paris\, LPTHE) as part of AnLy Strings and Fields online semina rs\n\n\nAbstract\nWe construct a new class of non-supersymmetric ten-dimen sional type II flux vacua\, by studying first order differential equations which are deformations of the N=1 supersymmetry conditions. We do so with in the context of Generalised Complex Geometry\, where there is a natural interpretation of the N = 1 supersymmetry conditions in terms of calibrati on conditions for probe D-branes\, called D-string\, domain-wall or space- filling branes\, depending on them wrapping 2\, 3 or 4 non-compact dimensi ons. We focus on a subclass of non-supersymmetric vacua violating the D-st ring calibration condition\, where the deformation of the calibration cond ition is dictated by the foliated geometry of the internal space. We prese nt the explicit construction of an example SU(3) background.\n LOCATION:https://researchseminars.org/talk/AnLy/38/ END:VEVENT BEGIN:VEVENT SUMMARY:Karapet Mkrtchyan (Imperial College London) DTSTART:20240214T150000Z DTEND:20240214T160000Z DTSTAMP:20260422T225701Z UID:AnLy/39 DESCRIPTION:Title: De mocratic formulation for p-forms and non-linear (twisted) self-duality equ ation\nby Karapet Mkrtchyan (Imperial College London) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nI will summarize recent progress in the democratic covariant Lagrangian formulation of (chiral) p- form dynamics\, including arbitrary abelian interactions and derivation of these Lagrangians from the description as edge modes of topological theor ies in higher dimensions.\n LOCATION:https://researchseminars.org/talk/AnLy/39/ END:VEVENT BEGIN:VEVENT SUMMARY:Cristofero Fraser-Taliente (Oxford U.\, Theor. Phys.) DTSTART:20240306T150000Z DTEND:20240306T160000Z DTSTAMP:20260422T225701Z UID:AnLy/40 DESCRIPTION:Title: Co mputation of Quark Masses in String Theory\nby Cristofero Fraser-Talie nte (Oxford U.\, Theor. Phys.) as part of AnLy Strings and Fields online s eminars\n\n\nAbstract\nWe present a numerical computation\, based on neura l network techniques\, of the physical Yukawa couplings in a heterotic str ing theory model obtained by compactifying on a smooth Calabi-Yau threefol d. The model in question is one of a large class of heterotic line bundle models with precisely the MSSM low-energy spectrum plus fields uncharged u nder the standard-model group. The relevant quantities\, that is\, the Ric ci-flat Calabi-Yau metric\, the Hermitian Yang-Mills bundle metrics and th e harmonic bundle-valued forms\, are all computed by training suitable neu ral networks. The calculation is carried out at several points along one-p arameter family in complex structure moduli space\, and each complete calc ulation takes about half a day on a laptop. The methods presented here gen eralise to other string models and constructions\, including to F-theory m odels.\n LOCATION:https://researchseminars.org/talk/AnLy/40/ END:VEVENT BEGIN:VEVENT SUMMARY:Benjamin J. Heindenreich (UMass Amherst) DTSTART:20240403T140000Z DTEND:20240403T150000Z DTSTAMP:20260422T225701Z UID:AnLy/41 DESCRIPTION:Title: A Proof of the Weak Gravity Conjecture in Perturbative Bosonic String Theory \nby Benjamin J. Heindenreich (UMass Amherst) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nI present a complete proof of th e Weak Gravity Conjecture (WGC) in perturbative\, bosonic string theory\, completing several partial arguments given in past literature. The proof l everages modular invariance\, long-range forces\, and their connection to extremal black holes. Along the way\, I discuss several variants of the WG C that play a role in the proof. I conclude by previewing the extension of the proof to perturbative superstrings\, which is work in progress.\n LOCATION:https://researchseminars.org/talk/AnLy/41/ END:VEVENT BEGIN:VEVENT SUMMARY:Arthur Hebecker (University of Heidelberg) DTSTART:20240515T140000Z DTEND:20240515T150000Z DTSTAMP:20260422T225701Z UID:AnLy/42 DESCRIPTION:Title: Lo op Blowup Inflation\nby Arthur Hebecker (University of Heidelberg) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nI will disc uss a new\, simple model of inflation in string theory. The role of the in flaton is played by a blowup modulus of a type IIB Calabi-Yau compactifica tion. I will start by recalling that\, in the Large Volume Scenario of mod uli stabilization\, such a modulus can remain unstabilized at leading orde r. This observation has given rise to the proposal of Blowup Inflation. Ho wever\, as I will explain\, loop corrections are generically present and t oo large to allow for slow roll. Our proposal employs this setting in a ne w regime\, where the value of the blowup modulus is much larger and slow-r oll can hence be realized. A detailed analysis\, based on the explicitly k nown form of loop corrections in this specific geometry\, reveals that obs ervational and consistency constraints can be met and interesting predicti ons for inflationary and late-time cosmological observables are possible.\ n LOCATION:https://researchseminars.org/talk/AnLy/42/ END:VEVENT BEGIN:VEVENT SUMMARY:Shota Komatsu (CERN) DTSTART:20240612T140000Z DTEND:20240612T150000Z DTSTAMP:20260422T225701Z UID:AnLy/43 DESCRIPTION:Title: BM N matrix model and open-closed-open triality\nby Shota Komatsu (CERN) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nWe revis it the Berenstein-Maldacena-Nastase (BMN) conjecture relating M-theory on a PP-wave background and Matrix Quantum Mechanics (MQM) of N×N matrices. In particular\, we study the BMN MQM at strong coupling and finite N and d erive an effective Hamiltonian that describes non-relativistic free partic les in a harmonic trap. The energy spectrum predicted by this Hamiltonian matches the supergravity excitation spectrum around the PP-wave background \, if we further assume the existence of bound states. Our derivation is b ased on the strong coupling expansion of the wavefunction and supersedes t he naive path integral approach that can lead to incorrect results\, as we demonstrate in a simple toy model. We conclude by discussing the relation between the BMN conjecture and AdS${}_4$/CFT${}_3$.\n LOCATION:https://researchseminars.org/talk/AnLy/43/ END:VEVENT BEGIN:VEVENT SUMMARY:Chris Blair (Madrid\, IFT) DTSTART:20240619T140000Z DTEND:20240619T150000Z DTSTAMP:20260422T225701Z UID:AnLy/44 DESCRIPTION:Title: Un ification of Decoupling Limits in String and M-Theory\nby Chris Blair (Madrid\, IFT) as part of AnLy Strings and Fields online seminars\n\n\nAbs tract\nOur understanding of M-theory is based on a duality web connecting different limits of the theory. I'll discuss the extension of this duality web to a wide variety of decoupling limits related by duality to the null reduction of M-theory (and hence to the proposal that M-theory can be des cribed by Matrix theory). From a modern perspective\, these limits involve non-Lorentzian geometries. I'll discuss how to systematically explore the se corners of M-theory\, following the roadmap of https://arxiv.org/abs/23 11.10564\n LOCATION:https://researchseminars.org/talk/AnLy/44/ END:VEVENT BEGIN:VEVENT SUMMARY:Yue-Zhou Li (Princeton University) DTSTART:20241016T140000Z DTEND:20241016T150000Z DTSTAMP:20260422T225701Z UID:AnLy/45 DESCRIPTION:Title: A universal cutoff for field theory with gravity\nby Yue-Zhou Li (Prince ton University) as part of AnLy Strings and Fields online seminars\n\n\nAb stract\nThere is a longstanding argument that local field theory with grav ity must break down at the species scale\, which is much lower than the Pl anck scale by the number of species. We aim to improve the understanding o f this statement. We analyze the one-loop effects of massive fields on the graviton scattering and the analyticity and unitarity allows us to put nu merical bounds on the number of light species. Around the scale where the field theory breaks down\, we instead analyze the partial waves and observ e that possible UV scenarios with gravity\, such as string theory\, all ex hibit significant high-spin contents. This motivates a concept "high-spin onset scale"\, which qualitatively coincides with string scale or higher d imensional Plank scale\, depending on the UV scenarios. The suggestion is that the high-spin onset scale is a universal cutoff for field theory\, be yond which the local field description should not exist.\n LOCATION:https://researchseminars.org/talk/AnLy/45/ END:VEVENT BEGIN:VEVENT SUMMARY:Andrea Dei (Chicago University\, EFI) DTSTART:20241002T140000Z DTEND:20241002T150000Z DTSTAMP:20260422T225701Z UID:AnLy/46 DESCRIPTION:Title: On supergravity and noncritical strings\nby Andrea Dei (Chicago Universi ty\, EFI) as part of AnLy Strings and Fields online seminars\n\n\nAbstract \nWhat is the string theory dual to 4d N=2 Super Yang Mills? Motivated by this question\, I will revisit some “noncritical” superstring models: these are string theories defined in less than ten spacetime dimensions. F ocusing on the setup with 6d Poincaré invariance\, I will explain how a c areful worldsheet analysis allows to identify the leading-order effective theories for the lowest modes. These are seven-dimensional\, maximally sup ersymmetric gauged supergravities. The noncritical string can be viewed as a special case of a discrete series of backgrounds labelled by an integer k: the “noncritical” value is k = 2\, while for k → ∞ one recover s a weakly-curved 10d target space. We will discuss the worldsheet approac h by boundary states and BPS solutions to the supergravity equations of mo tion.\n LOCATION:https://researchseminars.org/talk/AnLy/46/ END:VEVENT BEGIN:VEVENT SUMMARY:Michael Nee (Harvard University) DTSTART:20241112T150000Z DTEND:20241112T160000Z DTSTAMP:20260422T225701Z UID:AnLy/47 DESCRIPTION:Title: Ax ion couplings in Heterotic String Theory\nby Michael Nee (Harvard Univ ersity) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\n The couplings of axions to gauge bosons are highly restricted in Grand Uni fied Theories and heterotic string models. The topological nature of these couplings allows them to be matched from the UV to the IR\, and the ratio of the anomaly with photons and gluons for any axion is fixed by UV physi cs. This implies that in these theories there is a single axion\, the QCD axion\, with an anomalous coupling to photons. Other light axion-like part icles can couple to photons by mixing through the QCD axion portal and lie to the right of the QCD line in the mass-coupling plane. A discovery of a n axion to the left of the QCD line can rule out unified theories and some heterotic models. Axion experiments are therefore experimental probes of unification and string theory.\n LOCATION:https://researchseminars.org/talk/AnLy/47/ END:VEVENT BEGIN:VEVENT SUMMARY:Jakob Moritz (CERN) DTSTART:20241127T150000Z DTEND:20241127T160000Z DTSTAMP:20260422T225701Z UID:AnLy/48 DESCRIPTION:Title: De Sitter candidates in string theory\nby Jakob Moritz (CERN) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nThe simplest cosmo logy compatible with the accelerated expansion of our universe is de Sitte r space. Yet\, more than 25 years after the discovery of ``dark energy’ ’\, concrete de Sitter vacua of string theory have remained elusive. In this talk I will present the first fully concrete string compactifications that yield\, at leading order in the string loop and $\\alpha’$ expansi ons\, de Sitter vacua of a form envisioned by Kachru\, Kallosh\, Linde and Trivedi (KKLT) more than 20 years ago. I will begin by reviewing the KKLT proposal and its complex set of delicately balanced ingredients. Then\, I will show how all the required features come together in actual examples: I will define explicit Calabi-Yau orientifolds and choices of quantized f luxes\, and derive the corresponding four-dimensional effective supergravi ty theories. Each example includes a strongly warped ``Klebanov-Strassler throat'' region containing a single anti-D3-brane\, whose supersymmetry-br eaking energy\, computed at leading order in $\\alpha'$\, causes an uplift to a metastable de Sitter vacuum in which all moduli are stabilized. I wi ll conclude by emphasizing a set of outstanding computational problems tha t need to be overcome in order to determine whether these vacua survive (p resently unknown) subleading corrections\, and thus promote to full soluti ons of string theory.\n LOCATION:https://researchseminars.org/talk/AnLy/48/ END:VEVENT BEGIN:VEVENT SUMMARY:Philippe Brax (IPhT\, Saclay) DTSTART:20241211T150000Z DTEND:20241211T160000Z DTSTAMP:20260422T225701Z UID:AnLy/49 DESCRIPTION:Title: Ax io-dilaton screened cosmology\nby Philippe Brax (IPhT\, Saclay) as par t of AnLy Strings and Fields online seminars\n\n\nAbstract\nI will review the problems caused by light scalar fields in particular with respect to g ravitational tests and consider a new type of screening mechanism which al lows to evade them. This involves two fields\, an axion-like field and a d ilaton\, for which I will also present new results on their cosmology and a link to early dark energy.\n LOCATION:https://researchseminars.org/talk/AnLy/49/ END:VEVENT BEGIN:VEVENT SUMMARY:Linus Wulff (Masaryk University) DTSTART:20250115T150000Z DTEND:20250115T160000Z DTSTAMP:20260422T225701Z UID:AnLy/50 DESCRIPTION:Title: No manifest T-duality at alpha'^3\nby Linus Wulff (Masaryk University) a s part of AnLy Strings and Fields online seminars\n\n\nAbstract\nT-duality leads to a (continuous) O(d\,d) symmetry of the tree-level closed string effective action reduced from D=10 to 10-d. However\, this symmetry appear s only after certain field redefinitions. I will argue that when the $\\al pha^{\\prime \\\,3}$ correction is included these field redefinitions cann ot be lifted to ten dimensions. This poses a problem for approaches like g eneralized geometry and double field theory\, which assume an O(d\,d) stru cture is present before reduction.\n LOCATION:https://researchseminars.org/talk/AnLy/50/ END:VEVENT BEGIN:VEVENT SUMMARY:Chris Hull (Imperial College London) DTSTART:20250129T150000Z DTEND:20250129T160000Z DTSTAMP:20260422T225701Z UID:AnLy/51 DESCRIPTION:Title: Mo nopoles\, Dirac Strings and Generalised Symmetries\nby Chris Hull (Imp erial College London) as part of AnLy Strings and Fields online seminars\n \n\nAbstract\nDirac’s action for electrically and magnetically charged p articles interacting with the electromagnetic field involves singular Dira c strings which introduce a form of non-locality in the formulation. These are invisible provided they do not intersect charged particle world-lines – this is known as the Dirac veto. It is shown that this system has 1-f orm generalised symmetries and the Dirac veto can be viewed as a restricti on to configurations in which certain anomalies vanish.\n LOCATION:https://researchseminars.org/talk/AnLy/51/ END:VEVENT BEGIN:VEVENT SUMMARY:Miguel Montero (IFT\, Madrid) DTSTART:20250312T150000Z DTEND:20250312T160000Z DTSTAMP:20260422T225701Z UID:AnLy/52 DESCRIPTION:Title: Th e DGKT scenario and the Weak Gravity Conjecture\nby Miguel Montero (IF T\, Madrid) as part of AnLy Strings and Fields online seminars\n\n\nAbstra ct\nI will discuss how generic quantum corrections lift the moduli space o f BPS branes in 4d N=1 scale-separated solutions like DGKT. This means tha t there is a tension between this scenario and the WGC for membranes\, whi ch demands the existence of an exactly extremal brane. Similar tensions ex ist in any 4d N=1 scenario not protected by a parity symmetry\, and I will mention some examples.\n LOCATION:https://researchseminars.org/talk/AnLy/52/ END:VEVENT BEGIN:VEVENT SUMMARY:Niall Macpherson (Oviedo University) DTSTART:20250319T150000Z DTEND:20250319T160000Z DTSTAMP:20260422T225701Z UID:AnLy/53 DESCRIPTION:Title: G- structures for AdS2 and new solutions with N=6 supersymmetry\nby Niall Macpherson (Oviedo University) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nI will review the recent classification of minimal ly supersymmetric AdS2 solutions of type II supergravity in terms of G-str uctures which provides necessary\, sufficient and purely geometric conditi ons for supersymmetry. Together with an earlier work focused on d=11\, thi s puts AdS2 on the same geometric footing as its higher dimensional AdS co unterparts and provides powerful tools for the construction of many backgr ounds of physical interest. Examples include: black-hole near horizon geom etries\, holographic duals to superconformal quantum mechanics and duals t o conformal defects in higher dimensional CFTs.\n\nI will explain how thes e G-structure conditions may also be leveraged to construct solutions with extended supersymmetry and will provide some examples in this vein. Among st these my main focus will be on recently constructed solutions preservin g N=6 supersymmetry in massive type IIA and their dual description as well as a broad class in type IIB whose local form can be expressed in terms o f 2 holomorphic functions.\n LOCATION:https://researchseminars.org/talk/AnLy/53/ END:VEVENT BEGIN:VEVENT SUMMARY:Daniele Oriti (Universidad Complutense de Madrid) DTSTART:20250409T140000Z DTEND:20250409T150000Z DTSTAMP:20260422T225701Z UID:AnLy/54 DESCRIPTION:Title: La te-time cosmic acceleration from Quantum Gravity\nby Daniele Oriti (Un iversidad Complutense de Madrid) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nWe show how a cosmological dynamics with a late-t ime cosmic acceleration and an asymptotic deSitter regime can be obtained from hydrodynamics on minisuperspace\, a framework generalising quantum co smology with non-linear terms. We also show how this hydrodynamics framewo rk can be derived from fundamental quantum gravity models within the tenso rial group field theory formalism\, an approach closely related to lattice quantum gravity and loop quantum gravity. If time allows\, we discuss oth er results within the same framework\, concerning emergent cosmological ph ysics\, as well as other research directions leading to it.\n LOCATION:https://researchseminars.org/talk/AnLy/54/ END:VEVENT BEGIN:VEVENT SUMMARY:Gabriele Casagrande (CPHT\, Polytechnique) DTSTART:20250514T140000Z DTEND:20250514T150000Z DTSTAMP:20260422T225701Z UID:AnLy/55 DESCRIPTION:Title: A unique coupling of the massive spin-2 field to supergravity\nby Gabrie le Casagrande (CPHT\, Polytechnique) as part of AnLy Strings and Fields on line seminars\n\n\nAbstract\nIn this talk\, I will discuss the coupling of a massive spin-2 field to (undeformed) D=4\, N=1 supergravity. We do so b y constructing the general stress-energy tensor multiplet for the N=1 mass ive spin-2 supermultiplet. We show that\, at leading order in the Planck m ass\, this coupling is unique and characterized by a specific non-minimal coupling to the Riemann tensor. The massive spin-2 sector of this unique c oupling reproduces the one of an oscillator mode in open string theory. Th e massive spin-1 sector\, on the other hand\, includes a higher-derivative term that may lead to violations of causality\, which can be resolved by introducing infinitely many higher-spin fields\, similar to the Regge traj ectories in string theory. Moreover\, we argue that this coupling is genui nely different from the one arising from Kaluza-Klein reductions of higher -dimensional supergravities\, which we show leads instead to a deformation of the massless supersymmetry transformations.\n LOCATION:https://researchseminars.org/talk/AnLy/55/ END:VEVENT BEGIN:VEVENT SUMMARY:Fridrik Freyr Gautason (University of Southampton) DTSTART:20250618T140000Z DTEND:20250618T150000Z DTSTAMP:20260422T225701Z UID:AnLy/56 DESCRIPTION:Title: Lo calisation of M2-branes and Ensembles\nby Fridrik Freyr Gautason (Univ ersity of Southampton) as part of AnLy Strings and Fields online seminars\ n\n\nAbstract\nI will discuss the M2-brane partition function for a large class of asymptotically locally $AdS_4 \\times S^7$ spacetimes. I will sho w how supersymmetry localises the M2-brane position to a fixed point of an R-symmetry Killing vector. I will then discuss the one-loop partition fun ction of instantonic M2-branes and show that it is assembled out of buildi ng blocks familiar to 3D supersymmetric quantum field theories. I will clo se out with arguments that M theory on $AdS_4$ is dual to 3D CFT (such as ABJM) in the grand canonical ensemble. In that context the instanton parti tion function we obtain is one-loop exact.\n LOCATION:https://researchseminars.org/talk/AnLy/56/ END:VEVENT BEGIN:VEVENT SUMMARY:Mariana Graña (IPhT Saclay) DTSTART:20251008T140000Z DTEND:20251008T150000Z DTSTAMP:20260422T225701Z UID:AnLy/57 DESCRIPTION:Title: Th e boundary of symmetric spaces and the swampland distance conjecture\n by Mariana Graña (IPhT Saclay) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nThe swampland distance conjecture\, stating that a t any boundary of moduli space there is a tower of states becoming exponen tially massless\, has been checked in a wide variety of setups\, and is co nnected to other conjectures supported themselves by bottom-up arguments. However\, as it stands it lacks a bottom-up explanation. Here we prove it under mild assumptions for locally symmetric moduli spaces\, by characteri sing the spectrum and geodesics that go to the boundary using just group-t heory concepts. With this\, we can compute exponential rate of decay of t he mass for any symmetric space and any representation of the spectrum\, s howing that the distance conjecture is always satisfied. Moreover\, assumi ng only one irrep\, we classify all groups and particle representations co mpatible with the decay rates of KK and string towers. Some of them are in the known landscape of string theory compactifications\, while a handful remain to be found or proven to be in the swampland.\n LOCATION:https://researchseminars.org/talk/AnLy/57/ END:VEVENT BEGIN:VEVENT SUMMARY:Dimitrios Chatzis (Swansea University) DTSTART:20251015T140000Z DTEND:20251015T150000Z DTSTAMP:20260422T225701Z UID:AnLy/58 DESCRIPTION:Title: Co nformal to confining SQFTs through holography\nby Dimitrios Chatzis (S wansea University) as part of AnLy Strings and Fields online seminars\n\n\ nAbstract\nHolographic methods have long provided valuable insights into Q CD-like theories and other strongly coupled systems. In this talk\, I pres ent new work in this direction\, which uses SUSY solitons in 5d gauged sup ergravity to systematically construct smooth gravity backgrounds dual to c onfining and gapped systems. I will introduce novel solutions across diffe rent supergravity theories\, including setups with fundamental matter. The dual field theories flow from UV superconformal fixed points to well-defi ned IR SQFTs in one dimension lower. A range of field-theory observables i s computed holographically\, exhibiting universality and providing strong evidence for confinement and a mass gap. Finally\, I will highlight an int riguing numerical result concerning the entanglement entropy between diffe rent gauge and fundamental degrees of freedom.\n LOCATION:https://researchseminars.org/talk/AnLy/58/ END:VEVENT BEGIN:VEVENT SUMMARY:Ioannis Papadimitriou (Athens U.) DTSTART:20251105T150000Z DTEND:20251105T160000Z DTSTAMP:20260422T225701Z UID:AnLy/59 DESCRIPTION:Title: We ss-Zumino effective action for 4d N=1 SCFTs\nby Ioannis Papadimitriou (Athens U.) as part of AnLy Strings and Fields online seminars\n\n\nAbstra ct\nI will present a new computation of the Wess-Zumino effective action f or generic N=1 superconformal field theories in four dimensions using off- shell N=1 conformal supergravity in the components formalism. The result c urrently includes terms up to second order in the fermions. I will discuss the connection of this result with the superspace expression of Schwimmer and Theisen\, and comment on the relation with the supersymmetric Casimir energy and the holomorphicity of the partition function on supersymmetric backgrounds.\n LOCATION:https://researchseminars.org/talk/AnLy/59/ END:VEVENT BEGIN:VEVENT SUMMARY:Hynek Paul (KU Leuven) DTSTART:20251112T150000Z DTEND:20251112T160000Z DTSTAMP:20260422T225701Z UID:AnLy/60 DESCRIPTION:Title: Co rrelation functions for non-conformal Dp-brane holography\nby Hynek Pa ul (KU Leuven) as part of AnLy Strings and Fields online seminars\n\n\nAbs tract\nI will explain how we can study correlation functions of local oper ators in d-dimensional maximally supersymmetric Yang-Mills theories in the planar strongly-coupled limit via holography. The relevant supergravity b ackgrounds (obtained from the near-horizon limit of Dp-branes (with p=d-1) enjoy a scaling similarity\, giving rise to an auxiliary AdS space. This allows us to derive simple rules analogous to Witten diagrams for the holo graphic calculation of correlation functions in these non-conformal setups . Using this framework\, I will then explain how to analytically compute t wo- and three-point correlators of scalar operators\, leading to new resul ts which could be tested using lattice QFT methods. Based on [2503.18770] with Nikolay Bobev and Guillermo Mera Álvarez.\n LOCATION:https://researchseminars.org/talk/AnLy/60/ END:VEVENT BEGIN:VEVENT SUMMARY:Colin Sterckx (Brussels\, ULB) DTSTART:20251126T150000Z DTEND:20251126T160000Z DTSTAMP:20260422T225701Z UID:AnLy/61 DESCRIPTION:Title: Ho w to uplift non-maximal gauged supergravities\nby Colin Sterckx (Bruss els\, ULB) as part of AnLy Strings and Fields online seminars\n\n\nAbstrac t\nEmbedding lower-dimensional supergravities into type II and eleven-dime nsional theories has been central to constructing new supergravity solutio ns and analysing them using string-theoretic tools such as the AdS/CFT cor respondence. In this talk\, I will present a general framework for uplifti ng non-maximal gauged supergravities using exceptional field theory and ge neralised geometry\, extending techniques previously available only for ma ximal supergravities. Our method put constraints on the internal manifolds \, which must admit an effective action of the gauge group\, and we show t hat the consistency of the uplift reduces to a PDE on the quotient of the internal manifold by this action. I will illustrate the framework through the complete classification of type IIB uplifts of four-dimensional half-m aximal SO(4)-gauged supergravity. This will provide consistent truncations around any of the D’Hoker–Estes–Gutperle AdS_4 solutions.\n LOCATION:https://researchseminars.org/talk/AnLy/61/ END:VEVENT BEGIN:VEVENT SUMMARY:Alek Bedroya (Princeton U.) DTSTART:20260114T150000Z DTEND:20260114T160000Z DTSTAMP:20260422T225701Z UID:AnLy/62 DESCRIPTION:Title: Ho lographic Constraints on the String Landscape\nby Alek Bedroya (Prince ton U.) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\n I will discuss scale separation in top-down string theory constructions of AdS vacua\, focusing on proposals based on compactifications on Ricci-fla t manifolds such as DGKT and KKLT. I will then present a general argument that the putative CFT duals of such scale-separated AdS vacua cannot emerg e as infrared limits of any brane configuration in string theory\, implyin g that such vacua are unlikely to be UV complete. This explains why stable AdS vacua in string theory are essentially higher-dimensional in nature. If time permits\, I will conclude with further holographic constraints on scalar potentials with implications for cosmology.\n LOCATION:https://researchseminars.org/talk/AnLy/62/ END:VEVENT BEGIN:VEVENT SUMMARY:Ivano Basile (Garching\, Max Planck Inst.) DTSTART:20260128T150000Z DTEND:20260128T160000Z DTSTAMP:20260422T225701Z UID:AnLy/63 DESCRIPTION:Title: Ho rror vacui: instabilities in scale-separated Casimir compactifications \nby Ivano Basile (Garching\, Max Planck Inst.) as part of AnLy Strings an d Fields online seminars\n\n\nAbstract\nFinding reliable scale-separated v acua with no moduli in the string landscape is a considerable challenge\, yet it is essential to connect string theory to our universe. Among severa l attempts\, toroidal compactifications supported by fluxes and Casimir en ergy stand out for their simplicity and degree of parametric control. In p articular\, there exist simple such compactifications of eleven-dimensiona l supergravity leading to non-supersymmetric weakly curved anti-de Sitter solutions in four dimensions. I will show that these solutions are perturb atively (and non-perturbatively) unstable\, and thus do not pertain to bon a fide four-dimensional effective field theories.\n LOCATION:https://researchseminars.org/talk/AnLy/63/ END:VEVENT BEGIN:VEVENT SUMMARY:Naman Agarwal (Manitoba U.) DTSTART:20260225T150000Z DTEND:20260225T160000Z DTSTAMP:20260422T225701Z UID:AnLy/64 DESCRIPTION:Title: To ward an Effective Theory of the Volume Modulus\nby Naman Agarwal (Mani toba U.) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\ nIn this talk\, I will talk about my recent work with collaborators where we investigate the 4-dimensional effective theory of the warped volume mod ulus in the presence of stabilizing effects from gaugino condensation by a nalyzing the linearized 10-dimensional supergravity equations of motion. W arping is generally expected to scale down the masses of bulk modes to the IR scale at the tip of a throat. We find that the mass of the warped volu me modulus evades expectations and is largely insensitive to the effects o f warping\, even in strongly warped backgrounds. Instead\, the mass is par ametrically tied to the 4-dimensional AdS curvature scale $m^2 \\sim \\mat hcal{O}(1) \\hat{R}_{AdS}$\, presenting a challenge for scale separation i n these backgrounds. We trace this effect to a universal contribution aris ing from the 10-dimensional equations of motion\, and comment on the impor tance of a 10-dimensional treatment of the warped volume modulus for effec tive field theories and model building.\n LOCATION:https://researchseminars.org/talk/AnLy/64/ END:VEVENT BEGIN:VEVENT SUMMARY:Victor Franken (Gent U.) DTSTART:20260318T150000Z DTEND:20260318T160000Z DTSTAMP:20260422T225701Z UID:AnLy/65 DESCRIPTION:Title: Ho lographic quantum tasks in the static patch\nby Victor Franken (Gent U .) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nIn th e AdS/CFT correspondence\, direct scattering in the bulk may not have a lo cal boundary analog. A nonlocal implementation on the boundary requires O( 1/G​) mutual information. This statement is formalized by the connected wedge theorem\, which can be proven using general relativity within AdS_3 ​ but also by applying quantum information theory on the boundary\, sugg esting that the theorem applies to any holographic duality. We examine sca ttering within the static patch of asymptotically dS_3 spacetime\, which i s conjectured to be described by a quantum theory on the stretched horizon in static patch holography. We prove that causality on the horizon should be induced from null infinities to maintain consistency with the theorem. Specifically\, signals propagating in the static patch are associated wit h local operators at null infinity. These results suggest a novel connecti on between static patch holography and the dS/CFT correspondence.\n LOCATION:https://researchseminars.org/talk/AnLy/65/ END:VEVENT BEGIN:VEVENT SUMMARY:Salvatore Raucci (Madrid\, IFT) DTSTART:20260401T140000Z DTEND:20260401T150000Z DTSTAMP:20260422T225701Z UID:AnLy/66 DESCRIPTION:Title: Ad S vacua of non-supersymmetric strings\nby Salvatore Raucci (Madrid\, I FT) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nThe non-supersymmetric string landscape remains largely unexplored\, lacking t he systematic tools provided by the supergravity equations. In this talk\, I will discuss cases where the equations of motion of tachyon-free\, non- supersymmetric string theories can be recast as algebraic conditions. Focu sing on the ten-dimensional SO(16)×SO(16) heterotic string\, I will then present a systematic framework based on a fictitious Kaluza-Klein reductio n\, yielding AdS4 solutions on cosets G/H with H-valued gauge fields. If t ime permits\, I will outline the sigma-model version of the systematic app roach and comment on the generic features of the resulting vacua.\n LOCATION:https://researchseminars.org/talk/AnLy/66/ END:VEVENT BEGIN:VEVENT SUMMARY:Andrei Constantin (Birmingham U.) DTSTART:20260415T140000Z DTEND:20260415T150000Z DTSTAMP:20260422T225701Z UID:AnLy/67 DESCRIPTION:Title: Pa rticle Physics from String Theory on Calabi-Yau Threefolds\nby Andrei Constantin (Birmingham U.) as part of AnLy Strings and Fields online semin ars\n\n\nAbstract\nUnderstanding the origin of fermion masses and mixing a ngles remains a central challenge in particle physics and string phenomeno logy. In this talk\, I will describe recent progress on deriving realistic Standard Model spectra and flavour physics from heterotic string compacti fications on Calabi-Yau manifolds.\n LOCATION:https://researchseminars.org/talk/AnLy/67/ END:VEVENT END:VCALENDAR