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BEGIN:VEVENT
SUMMARY:Tadashi Okazaki (KIAS)
DTSTART:20220124T003000Z
DTEND:20220124T013000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/1
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ATP2022/1/">
 Boundaries and corners in supersymmetric gauge theories</a>\nby Tadashi Ok
 azaki (KIAS) as part of Advances in Theoretical Physics 2022\n\n\nAbstract
 \nI will discuss recent studies of boundary and corner configurations in s
 upersymmetric gauge theories. They involve various dualities across the di
 mensions of spacetime and potential applications to twisted holography fro
 m their brane constructions in the context of twisted M-theory.\n
LOCATION:https://researchseminars.org/talk/ATP2022/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Xin Wang (KIAS)
DTSTART:20220124T020000Z
DTEND:20220124T030000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/2
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ATP2022/2/">
 Wilson loops in 5d supersymmetric gauge theories</a>\nby Xin Wang (KIAS) a
 s part of Advances in Theoretical Physics 2022\n\n\nAbstract\nIn the super
 symmetric version of gauge theories in 5d\, the insertion of half-BPS Wils
 on loop operators provides interesting physical observables. In this talk\
 , I will review the recent progress in calculating the 5d Wilson loop expe
 ctation values in supersymmetric gauge theories.\n
LOCATION:https://researchseminars.org/talk/ATP2022/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Subhajit Mazumdar (Seoul National University)
DTSTART:20220124T100000Z
DTEND:20220124T110000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/3
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ATP2022/3/">
 Kite and Triangle diagrams through Symmetries of Feynman Integrals</a>\nby
  Subhajit Mazumdar (Seoul National University) as part of Advances in Theo
 retical Physics 2022\n\n\nAbstract\nThe Symmetries of Feynman Integrals (S
 FI) is a method for evaluating Feynman Integrals which exposes a novel con
 tinuous group associated with the diagram which depends only on its topolo
 gy and acts on its parameters. Using this method we study the kite diagram
  (a two-loop diagram with two external legs) and the most general triangle
  diagram (one-loop diagram with three external legs) with arbitrary masses
  and space-time dimensions. Generically\, this method reduces a Feynman in
 tegral into a line integral over simpler diagrams. We identify the locus/l
 oci in parameter space where the integrals further reduce to a mere linear
  combination of simpler diagrams. We generalize and revisit some known res
 ults.\n
LOCATION:https://researchseminars.org/talk/ATP2022/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Akhil Sivakumar (ICTS)
DTSTART:20220124T113000Z
DTEND:20220124T123000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/4
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ATP2022/4/">
 Lecture: Schwinger-Keldysh formalism and open field theories</a>\nby Akhil
  Sivakumar (ICTS) as part of Advances in Theoretical Physics 2022\n\n\nAbs
 tract\nSchwinger-Keldysh path integral is a technique to study evolution o
 f mixed states. In this lecture\, I will introduce this formalism and expl
 ain how it can be used to compute the effective action of a quantum system
  interacting with a bath. Such a system will undergo non-unitary evolution
  and is an open quantum system. Using the toy model of a Brownian particle
 \, I will show how the data contained in the SK description can be mapped 
 to the more familiar form of a Langevin equation.\n
LOCATION:https://researchseminars.org/talk/ATP2022/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mukund Rangamani (UC Davis)
DTSTART:20220125T003000Z
DTEND:20220125T013000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/5
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ATP2022/5/">
 Real-time gravitational replicas</a>\nby Mukund Rangamani (UC Davis) as pa
 rt of Advances in Theoretical Physics 2022\n\n\nAbstract\nI will discuss r
 eal-time path integrals in gravitational theories. As applications we will
  describe the general structure of replica wormhole saddles and exemplify 
 them with some low dimensional examples. Time permitting\, I will also men
 tion\,  some aspects of effective dynamics of open quantum systems with lo
 ng-term memory.\n
LOCATION:https://researchseminars.org/talk/ATP2022/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Shota Komatsu (CERN)
DTSTART:20220125T020000Z
DTEND:20220125T030000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/6
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ATP2022/6/">
 Analyticity and Unitarity for Cosmological Correlators</a>\nby Shota Komat
 su (CERN) as part of Advances in Theoretical Physics 2022\n\n\nAbstract\nI
  will discuss the fundamentals of quantum field theory on a rigid de Sitte
 r space. First\, I will show that the perturbative expansion of late-time 
 correlation functions to all orders can be equivalently generated by a non
 -unitary Lagrangian on a Euclidean AdS geometry. This finding simplifies d
 ramatically perturbative computations\, as well as allows us to establish 
 basic properties of these correlators\, which comprise a Euclidean CFT. Se
 cond\, I use this to infer the analytic structure of the spectral density 
 that captures the conformal partial wave expansion of a late-time four-poi
 nt function\, to derive an OPE expansion\, and to constrain the operator s
 pectrum. Third\, I will prove that unitarity of the de Sitter theory manif
 ests itself as the positivity of the spectral density. This statement does
  not rely on the use of Euclidean AdS Lagrangians and holds non-perturbati
 vely.\n
LOCATION:https://researchseminars.org/talk/ATP2022/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Pavel Kovtun (University of Victoria)
DTSTART:20220125T100000Z
DTEND:20220125T110000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/7
DESCRIPTION:by Pavel Kovtun (University of Victoria) as part of Advances i
 n Theoretical Physics 2022\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/ATP2022/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Matti Jarvinen (APCTP)
DTSTART:20220125T113000Z
DTEND:20220125T123000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/8
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ATP2022/8/">
 Strong coupling models for dense and hot QCD</a>\nby Matti Jarvinen (APCTP
 ) as part of Advances in Theoretical Physics 2022\n\n\nAbstract\nGauge/gra
 vity duality can be useful to model QCD at intermediate temperatures and d
 ensities\, where first-principles results are not available. This region i
 s relevant for core-collapse supernovae and binary neutron star mergers. I
  present a new framework for the QCD equation of state which combines the 
 holographic V-QCD model with traditional nuclear theory models\, and cover
 s all relevant temperatures and densities. I use V-QCD to describe both nu
 clear and quark matter at high densities\, with temperature dependence est
 imated by employing a simple van der Waals hadron gas model. At low densit
 ies\, I use DD2 Hempel-Schaffner-Bielich model\, i.e.\, a statistical mode
 l for nuclear matter with relativistic mean field interactions. The result
 ing "hybrid" model gives predictions\, among other things\, for the mixed 
 quark-hadron phase and the location of the critical endpoint of the quark-
 hadron transition. I will also discuss preliminary results from neutron st
 ar merger simulations which use this model.\n
LOCATION:https://researchseminars.org/talk/ATP2022/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kanghoon Lee (APCTP)
DTSTART:20220126T100000Z
DTEND:20220126T110000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/9
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ATP2022/9/">
 Quantum Perturbiner Method</a>\nby Kanghoon Lee (APCTP) as part of Advance
 s in Theoretical Physics 2022\n\n\nAbstract\nWe construct the off-shell re
 cursion relation for arbitrary loop-level scattering amplitudes beyond the
  tree-level Berends-Giele recursion relation for any quantum field theory.
  We define the quantum perturbiner expansion from the quantum effective ac
 tion formalism\, including the perturbative quantum corrections. Instead o
 f the classical EoM in the conventional perturbiner method\, we exploit th
 e Dyson-Schwinger equation to derive the recursion relation for arbitrary 
 order of loop-level scattering amplitudes. Furthermore\, we extend this te
 chnique to compute the loop-level correlation functions.\n
LOCATION:https://researchseminars.org/talk/ATP2022/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Miok Park (IBS-CTPU)
DTSTART:20220126T113000Z
DTEND:20220126T123000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/10
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ATP2022/10/"
 >Identifying Riemannian singularities with regular non-Riemannian geometry
 </a>\nby Miok Park (IBS-CTPU) as part of Advances in Theoretical Physics 2
 022\n\n\nAbstract\nAdmitting non-Riemannian geometries\, Double Field Theo
 ry extends the notion of spacetime beyond the Riemannian paradigm. We iden
 tify a class of singular spacetimes known in General Relativity with regul
 ar non-Riemannian geometries. The former divergences merely correspond to 
 coordinate singularities of the generalised metric for the latter. Compute
 d in string frame\, they feature an impenetrable non-Riemannian sphere out
 side of which geodesics are complete with no singular deviation. Approachi
 ng the non-Riemannian points\, particles freeze and strings become (anti-)
 chiral.\n
LOCATION:https://researchseminars.org/talk/ATP2022/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Paolo Glorioso (Stanford University)
DTSTART:20220127T003000Z
DTEND:20220127T013000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/11
DESCRIPTION:by Paolo Glorioso (Stanford University) as part of Advances in
  Theoretical Physics 2022\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/ATP2022/11/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Stephen Angus (APCTP)
DTSTART:20220127T020000Z
DTEND:20220127T030000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/12
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ATP2022/12/"
 >Fractons\, geometrically</a>\nby Stephen Angus (APCTP) as part of Advance
 s in Theoretical Physics 2022\n\n\nAbstract\nI will discuss how fracton ph
 ysics can be studied systematically within the geometric framework of Doub
 le Field Theory (DFT).  Following an introductory review of fractons\, I w
 ill argue that their restricted mobility and large degeneracy of quantum s
 tates can be attributed to the generalized geodesics and infinite-dimensio
 nal isometries present in non-Riemannian backgrounds of DFT.  Furthermore\
 , we find that a doubled pure Yang-Mills or Maxwell theory reduces to an o
 rdinary one interacting with a strain tensor theory\, giving a unifying de
 scription of photons and phonons.  I will show how this photon-phonon theo
 ry\, when minimally coupled to a charged particle in a non-Riemannian back
 ground\, lifts the particle immobility to a saturation velocity and gives 
 a modified dispersion relation.\n
LOCATION:https://researchseminars.org/talk/ATP2022/12/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jesse Van Muiden (SISSA)
DTSTART:20220127T100000Z
DTEND:20220127T110000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/13
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ATP2022/13/"
 >Janus Interfaces\, S-Folds\, and Conformal Manifolds</a>\nby Jesse Van Mu
 iden (SISSA) as part of Advances in Theoretical Physics 2022\n\n\nAbstract
 \nIn this talk I will present some recent holographic studies on Janus int
 erfaces in four-dimensional N=4 SYM\, and the CFTs living on these interfa
 ces. Interestingly\, these theories can be compactified on S^1\, with an S
 -duality twist\, resulting in a new class of three-dimensional CFTs\, know
 n as S-folds. Finally\, I will discuss the conformal manifolds on which th
 ese S-fold CFTs lie\, which preserve either three-dimensional N=1 or N=2 s
 upersymmetry.\n
LOCATION:https://researchseminars.org/talk/ATP2022/13/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Chris Couzens (Kyunghee University)
DTSTART:20220127T113000Z
DTEND:20220127T123000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/14
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ATP2022/14/"
 >Defect black hole horizons and new SCFT twists</a>\nby Chris Couzens (Kyu
 nghee University) as part of Advances in Theoretical Physics 2022\n\n\nAbs
 tract\nIn this talk we will give a pedagogical review of new (supersymmetr
 ic) black hole horizons containing defects\, that have appeared recently i
 n the literature. These 2d horizons are topologically punctured two-sphere
 s\, with at least two punctures\, and are equipped with non-constant curva
 ture metrics. They arise when considering the near-horizon limit of extrem
 al asymptotically AdS accelerating black holes. Interestingly\, despite th
 e black hole solutions having singularities\, by uplifting the solutions t
 o string theory the solution can be made singularity free in certain cases
 . By using AdS/CFT we have a complimentary dual field theory perspective. 
 The near-horizon geometry corresponds to the fixed point of an RG-flow acr
 oss dimensions\, triggered by wrapping a parent theory  on the 2d horizon.
  As we will show\, in order for the fixed point to preserve supersymmetry\
 , the introduction of new and novel twists of the theory is required. We w
 ill make some comments on performing a microstate computation of the entro
 py of the black hole.\n
LOCATION:https://researchseminars.org/talk/ATP2022/14/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Taiki Haga (University of Tokyo)
DTSTART:20220128T003000Z
DTEND:20220128T013000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/15
DESCRIPTION:by Taiki Haga (University of Tokyo) as part of Advances in The
 oretical Physics 2022\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/ATP2022/15/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dario Rosa (PCS-IBS)
DTSTART:20220128T020000Z
DTEND:20220128T030000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/16
DESCRIPTION:by Dario Rosa (PCS-IBS) as part of Advances in Theoretical Phy
 sics 2022\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/ATP2022/16/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Viktor Jahnke (GIST)
DTSTART:20220128T100000Z
DTEND:20220128T110000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/17
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ATP2022/17/"
 >Holographic teleportation with conservation laws: diffusion on traversabl
 e wormholes</a>\nby Viktor Jahnke (GIST) as part of Advances in Theoretica
 l Physics 2022\n\n\nAbstract\nWe study the effects of conservation laws on
  wormholes that are made traversable by a double trace deformation. After 
 coupling the two asymptotic boundaries of an eternal AdS-Schwarzschild bla
 ck hole with $U(1)$ conserved current operators\, we find that the corresp
 onding quantum matter stress-energy tensor violates the averaged null ener
 gy condition (ANEC) in the bulk\, rendering the wormhole traversable. We d
 iscuss how the wormhole opening depends on the charge diffusion constant a
 nd how this affects the amount of information that can be sent through the
  wormhole.\n
LOCATION:https://researchseminars.org/talk/ATP2022/17/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kaiwen Sun (KIAS)
DTSTART:20220128T113000Z
DTEND:20220128T123000Z
DTSTAMP:20260422T212927Z
UID:ATP2022/18
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ATP2022/18/"
 >New  dualities between 2d rational CFTs</a>\nby Kaiwen Sun (KIAS) as part
  of Advances in Theoretical Physics 2022\n\n\nAbstract\nI discuss some int
 eresting new developments on 2d rational CFTs\, which are basic tools for 
 both string theory and condensed matter theory. For the last a few years\,
  holomorphic modular bootstrap has become a powerful approach to classify 
 2d rational CFTs with given number of characters. A large number of new CF
 Ts have been revealed. Benefited from the recent results on the classifica
 tion\, a new pattern of duality emerges for pairs of two CFTs with sumatio
 n of their central charge as 24. The characters of the dual CFTs satisfy c
 ertain universal bilinear relations. We systemically study such duality am
 ong 2d rational CFTs with less than six characters. This is based on a rec
 ent work with Zhihao Duan and Kimyeong Lee.\n
LOCATION:https://researchseminars.org/talk/ATP2022/18/
END:VEVENT
END:VCALENDAR