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BEGIN:VEVENT
SUMMARY:Clifford V. Johnson (University of Southern California)
DTSTART:20200720T174500Z
DTEND:20200720T190000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/1
DESCRIPTION:Title: Non-perturbative Studies of JT Gravity and Supergravity using
Minimal Strings\nby Clifford V. Johnson (University of Southern Calif
ornia) as part of IAS High Energy Theory Monday Seminar Series\n\n\nAbstra
ct\nVarious Jackiw–Teitelboim (JT) gravity and supergravity theories hav
e been shown (by Saad\, Shenker and Stanford\, and by Stanford and Witten)
to have double scaled random matrix model descriptions\, capturing the (s
pacetime) topological perturbative expansion of the partition function us
ing beautiful recursive methods developed by Mirzakhani and others. I will
describe an alternative method for building the matrix model description\
, using techniques from minimal string theory. This method is particularly
useful for supplying non-perturbative definitions of the physics. I apply
this to computing - for the first time - the non-perturbative spectral de
nsity and spectral form factor for several examples.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ken Van Tilburg (KITP\, University of California\, Santa Barbara)
DTSTART:20200810T183000Z
DTEND:20200810T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/2
DESCRIPTION:Title: Stellar Basins of Gravitationally Bound Particles\nby Ken
Van Tilburg (KITP\, University of California\, Santa Barbara) as part of
IAS High Energy Theory Monday Seminar Series\n\n\nAbstract\nI will describ
e and explore the consequences of a newly identified physical phenomenon:
volumetric stellar emission into gravitationally bound orbits of weakly co
upled particles such as axions\, moduli\, hidden photons\, and neutrinos.
While only a tiny fraction of the instantaneous luminosity of a star (the
vast majority of the emission is into relativistic modes)\, the continual
injection of these particles into a small part of phase space causes them
to accumulate over astrophysically long time scales\, forming what I call
a "stellar basin"\, in analogy with the geologic kind. The energy density
of the Solar basin can surpass that of the relativistic Solar flux at Eart
h's location after only a million years\, for any sufficiently long-lived
particle produced through an emission process whose matrix elements are un
suppressed at low momentum. This observation has immediate and striking co
nsequences for direct detection experiments---including new limits on axio
n and hidden-photon parameter space independent of dark matter assumptions
---and may also increase the prospects for indirect detection of weakly in
teracting particles around stars.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Xi Dong (University of California\, Santa Barbara)
DTSTART:20200817T183000Z
DTEND:20200817T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/3
DESCRIPTION:Title: Enhanced Corrections to the Page Curve near Holographic Entan
glement Transitions\nby Xi Dong (University of California\, Santa Barb
ara) as part of IAS High Energy Theory Monday Seminar Series\n\n\nAbstract
\nI will present enhanced corrections to the entanglement entropy of a sub
system in holographic states. These corrections appear near phase transit
ions in the entanglement entropy due to competing extremal surfaces\, and
they are holographic avatars of similar corrections previously found in ch
aotic energy eigenstates. I will first show explicitly how to find these
corrections in chaotic eigenstates by summing over contributions of all bu
lk saddle point solutions\, including those that break the replica symmetr
y\, and by making use of fixed-area states. I will then comment on severa
l intriguing features of this tractable example and discuss a way of under
standing these enhanced corrections in other\, more general holographic ex
amples.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andy Neitzke (Yale University)
DTSTART:20200824T174500Z
DTEND:20200824T190000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/4
DESCRIPTION:Title: An update on exact WKB and supersymmetric field theory\nb
y Andy Neitzke (Yale University) as part of IAS High Energy Theory Monday
Seminar Series\n\n\nAbstract\nOver the last decade it has become clear tha
t there is a close connection between the BPS sector of N=2 supersymmetric
field theories in four dimensions and the exact WKB method for analysis o
f ordinary differential equations (Schrodinger equations and their higher-
order analogues). I will review the basic players in this story and some o
f the main results\, and describe some outstanding puzzles.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Zohar Komargodski (Simons Center for Geometry and Physics\, Stony
Brook University)
DTSTART:20200914T183000Z
DTEND:20200914T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/5
DESCRIPTION:Title: Non-Symmetries\, Naturalness\, and Two-Dimensional Adjoint QC
D\nby Zohar Komargodski (Simons Center for Geometry and Physics\, Sto
ny Brook University) as part of IAS High Energy Theory Monday Seminar Seri
es\n\n\nAbstract\nWe will explain the notion of "non-symmetries" or "defec
t symmetries." We will show that massless two-dimensional QCD admits expon
entially many such symmetries. We will use them to prove deconfinement as
well as to compute exactly the tension of all k-strings in the small mass
limit. Finally\, we will discuss quartic fermion deformations and exhibit
some unexpected phases which we can determine using the defect symmetries.
\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Thomas Faulkner (University of Illinois Urbana-Champaign)
DTSTART:20200928T183000Z
DTEND:20200928T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/6
DESCRIPTION:Title: The Holographic Map as a Conditional Expectation\nby Thom
as Faulkner (University of Illinois Urbana-Champaign) as part of IAS High
Energy Theory Monday Seminar Series\n\n\nAbstract\nI will demonstrate that
holographic error correcting codes naturally give rise to conditional exp
ectations acting on the local operator algebras in the boundary theory. I
will use this to give simple derivations of some previously known results
as well as some new results when multiple boundary/bulk algebras are consi
dered. Connections to the theory of QFT superselection sectors will be dis
cussed. I will also discuss some shortcomings of these codes as models of
AdS/CFT.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Senthil Todadri (Massachusetts Institute of Technology)
DTSTART:20201012T183000Z
DTEND:20201012T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/7
DESCRIPTION:Title: Compressible Quantum Matter: General Constraints\, Emergent S
ymmetries\, and Anomalies\nby Senthil Todadri (Massachusetts Institute
of Technology) as part of IAS High Energy Theory Monday Seminar Series\n\
n\nAbstract\nI will discuss properties of phases of matter in systems with
a global U(1) symmetry and a (possibly discrete) translation symmetry. \
n\nThe low energy theory of such systems is strongly constrained by these
symmetries. I will give a framework to understand such constraints in grea
t generality\, vastly generalizing old theorems. The most powerful constr
aint comes about if the system is compressible\, in which case the low-en
ergy theory must have a very large emergent symmetry group -- larger than
any compact Lie group. A familiar example is a Landau Fermi liquid\, who
se properties I will revisit from a modern point of view of characterizin
g its emergent symmetry and the associated 't Hooft anomaly. Many\, if n
ot all\, non-Fermi liquids will have the same emergent symmetry group/anom
aly as a Fermi liquid (even though they could have very different dynamics
)\, and this determines some of their universal properties. I will discuss
the implications for understanding the famous "strange metal" physics obs
erved in experiments in some condensed matter systems.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Geoff Penington (Stanford University)
DTSTART:20201026T183000Z
DTEND:20201026T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/8
DESCRIPTION:Title: Leading order corrections to the quantum extremal surface pre
scription\nby Geoff Penington (Stanford University) as part of IAS Hig
h Energy Theory Monday Seminar Series\n\n\nAbstract\nWe show that a naïve
application of the quantum extremal surface (QES) prescription can lead t
o paradoxical results and must be corrected at leading order. The correcti
ons arise when there is a second QES (with strictly larger generalized ent
ropy at leading order than the minimal QES)\, together with a large amount
of highly incompressible bulk entropy between the two surfaces. We trace
the source of the corrections to a failure of the assumptions used in the
replica trick derivation of the QES prescription\, and show that a more ca
reful derivation correctly computes the corrections. Using tools from one-
shot quantum Shannon theory (smooth min-and max-entropies)\, we generalize
these results to a set of refined conditions that determine whether the Q
ES prescription holds. We find similar refinements to the conditions neede
d for entanglement wedge reconstruction (EWR)\, and show how EWR can be re
interpreted as the task of one-shot quantum state merging (using zero-bits
rather than classical bits)\, a task gravity is able to achieve optimally
efficiently.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ryan Thorngren (Harvard University)
DTSTART:20201109T193000Z
DTEND:20201109T210000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/9
DESCRIPTION:Title: Adventures in Gapless Topological Phases\nby Ryan Thorngr
en (Harvard University) as part of IAS High Energy Theory Monday Seminar S
eries\n\n\nAbstract\nA fascinating feature of some gapped systems is topol
ogical order\, where the system flows to a nontrivial TQFT in the infrared
. The gap is often essential to the description of these phases\, so it is
interesting to ask what happens to them when the gap closes\, and if ther
e are more general topological phases which require the absence of a gap.
In this talk\, I will describe recent progress in exploring such phases. T
he talk will follow two main themes: the fate of a gapped SPT phase at a s
ymmetry breaking transition\, and intrinsically gapless SPT phases in the
presence of an emergent anomaly. I will describe a conjectural bulk-bounda
ry correspondence which explains the edge modes in both of these cases.\n\
nThis talk is based on arXiv:2008.06638 and arXiv:1905.06969.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andrew Strominger (Harvard University)
DTSTART:20201123T193000Z
DTEND:20201123T210000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/10
DESCRIPTION:Title: Progress on Celestial Holography\nby Andrew Strominger (
Harvard University) as part of IAS High Energy Theory Monday Seminar Serie
s\n\n\nAbstract\nWe review some recent progress towards understanding h
olographic duality for quantum gravity in asymptotically flat four-dimensi
onal spacetimes.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Simon Caron-Huot (McGill University)
DTSTART:20201214T193000Z
DTEND:20201214T210000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/12
DESCRIPTION:Title: Causality and Effective Field Theories\nby Simon Caron-H
uot (McGill University) as part of IAS High Energy Theory Monday Seminar S
eries\n\n\nAbstract\nDispersion relations are statements of causality. The
y give sum rules connecting infrared and ultraviolet physics. They are gre
at. While they originate from optics and quantum field theory\, in a first
part of this talk I will argue that their 'true purpose' is gravity\, vie
wed as a low-energy effective theory. I will present ongoing work mapping
out the space of consistent effective theories\, including recent results
in scalar models deriving a sharp version of dimensional analysis scaling
from causality.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/12/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jorrit Kruthoff (Stanford University)
DTSTART:20210125T193000Z
DTEND:20210125T210000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/13
DESCRIPTION:Title: Classical Aspects of Black Hole Interiors\nby Jorrit Kru
thoff (Stanford University) as part of IAS High Energy Theory Monday Semin
ar Series\n\n\nAbstract\nWe will discuss the geometry behind the horizon o
f various asymptotically AdS black holes when the boundary CFT is deformed
by a scalar operator. The dynamics of classical GR in the region inside t
he black hole turns out to be rather intricate\, with even fractal like be
havior emerging in some situations. We will see that\, generically\, in th
e presence of a scalar deformation\, Cauchy horizons are replaced by a spa
celike singularity. This motivates a notion of 'holographic' cosmic censor
ship. This talk is based on 2004.01192\, 2006.10056 and 2008.12786.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/13/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Xiao-Gang Wen (Massachusetts Institute of Technology)
DTSTART:20210201T193000Z
DTEND:20210201T210000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/14
DESCRIPTION:Title: A Categorical and Holographic View of Symmetry\nby Xiao-
Gang Wen (Massachusetts Institute of Technology) as part of IAS High Energ
y Theory Monday Seminar Series\n\n\nAbstract\nA symmetry is usually descri
bed by transformations and an associated group. However\, a symmetry can a
lso be described by the conservation of charges\, encoded by their fusion
rule. This leads to a description of symmetry based on fusion category. Ho
wever\, only fusion categories that describe excitations of of a topologi
cal order in one higher dimension correspond to a non-trivial symmetry. In
fact\, the symmetry directly correspond to the topological order in one h
igher dimension\, which leads to a holographic view of symmetry.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/14/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Patrick Hayden (Stanford University)
DTSTART:20210215T193000Z
DTEND:20210215T210000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/15
DESCRIPTION:Title: Fault-tolerant qubit from a constant number of components\nby Patrick Hayden (Stanford University) as part of IAS High Energy Theo
ry Monday Seminar Series\n\n\nAbstract\nWith gate error rates in multiple
technologies now below the threshold required for fault-tolerant quantum c
omputation\, the major remaining obstacle to useful quantum computation is
scaling\, a challenge greatly amplified by the huge overhead imposed by q
uantum error correction itself. I’ll discuss a new a fault-tolerant quan
tum computing scheme that can nonetheless be assembled from a small number
of experimental components\, potentially dramatically reducing the engine
ering challenges associated with building a large-scale fault-tolerant qua
ntum computer. The architecture couples a single controllable qubit to a p
air of delay lines which terminate in a detector. Below a threshold noise
value for the controllable qubit\, the logical error rate decays exponenti
ally with the square root of the delay line coherence time. The required g
ates can be implemented using existing technologies in quantum photonic an
d phononic systems. With continued incremental improvements in only a few
components\, we expect these systems to be promising candidates for demons
trating fault-tolerant quantum computation with comparatively modest exper
imental effort.\n\nBased on joint work with Kianna Wan\, Soonwon Choi\, Is
aac Kim and Noah Shutty.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/15/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Surjeet Rajendran (Johns Hopkins University)
DTSTART:20210301T193000Z
DTEND:20210301T210000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/16
DESCRIPTION:Title: Firewalls in General Relativity\nby Surjeet Rajendran (J
ohns Hopkins University) as part of IAS High Energy Theory Monday Seminar
Series\n\n\nAbstract\nWe present spherically symmetric solutions to Einste
in’s equations\, which are equivalent to canonical Schwarzschild and Rei
ssner-Nordstrom black holes on the exterior\, but with singular (Planck-de
nsity) shells at their respective event and inner horizons. The locally me
asured mass of the shell and the singularity are much larger than the asym
ptotic Arnowitt-Deser-Misner mass. The area of the shell is equal to that
of the corresponding canonical black hole\, but the physical distance from
the shell to the singularity is a Planck length\, suggesting a natural ex
planation for the scaling of the black hole entropy with area. The existen
ce of such singular shells enables solutions to the black hole information
problem of Schwarzschild black holes and the Cauchy horizon problem of Re
issner-Nordstrom black holes. While we cannot rigorously address the forma
tion of these solutions\, we suggest plausibility arguments for how “nor
mal” black hole solutions may evolve into such states. We also discuss t
he stability of these structures.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/16/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Greg Moore (Rutgers University)
DTSTART:20210315T183000Z
DTEND:20210315T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/17
DESCRIPTION:Title: N=2* SU(2) Supersymmetric Yang-Mills Theory and Four-Manifol
d Invariants\nby Greg Moore (Rutgers University) as part of IAS High E
nergy Theory Monday Seminar Series\n\n\nAbstract\nThis is a continuation o
f a series of talks I have given in recent years reporting on work with Ja
n Manschot\, et. al.\n\nThere will be some repetition\, and some updates a
nd new results. (See below for some relevant links.)\n\nManschot and I h
ave revisited the derivation of topological invariants of four-manifolds
(smooth\, compact\, oriented\, no boundary) using N=2 supersymmetric field
theory.\n\nFor the N=2* theory topological twisting introduces a depende
nce on an ``ultraviolet'' spin-c structure. The dependence on the ultravi
olet spin-c structure is thoroughly investigated in this work in the case
where the gauge group is SU(2) or SO(3). \n\nA key step in the derivation
of the invariants involves an integral over the Coulomb branch of the the
ory. It should be possible to write a Coulomb branch integral for any clas
s S theory. However\, the present example illustrates some subtleties\, w
hich were not appreciated when the subject was first studied in the 1990's
\, in forming a well-defined measure. There has also been recent progress
in evaluating Coulomb branch integrals. This is due to an improved underst
anding of the relation of the integrand to Jacobi-Maass forms\, indefinite
theta functions\, and mock modular forms.\n\nIn the N=2* case the partiti
on functions are are (mock) modular in the ultraviolet coupling constant
and are (suitably) S-duality covariant in that parameter. For b2+>1 the pa
th integral can be explicitly expressed as a finite sum over (infrared) sp
in-c structures of modular expressions in the ultraviolet coupling.\n\nThe
SU(2) N=2* theory also has a mass parameter. Using the large mass limit
one can rederive the renowned Witten conjecture expressing the Donaldson i
nvariants in terms of the Seiberg-Witten invariants. When the ultraviolet
spin-c structure is the canonical one determined by an almost complex stru
cture\, the mass to zero limit reproduces (somewhat surprisingly) the resu
lts of Vafa and Witten for topologically twisted N=4 SYM. The expressions
are also closely related to recent results in enumerative algebraic geomet
ry due to Gottsche\, Kool\, Nakajima\, and Williams.\n\nPrevious talks clo
sely related to this one:\n\nStringMath 2018: http://www.physics.rutgers.e
du/~gmoore/StringMath2018-Final.pdf\n\nJMM January 2020: http://www.physic
s.rutgers.edu/~gmoore/JMM-Talk-Jan18-2020.pdf\n\nWHCGP July 2020: http://w
ww.physics.rutgers.edu/~gmoore/WHCGP-July20-2020.pdf\n\nKITP December 2020
: https://online.kitp.ucsb.edu/online/mod20/moore/\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/17/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Arvin Shahbazi-Moghaddam (Stanford University)
DTSTART:20210412T183000Z
DTEND:20210412T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/18
DESCRIPTION:Title: Causal Bulk Reconstruction and the Python’s Lunch\nby
Arvin Shahbazi-Moghaddam (Stanford University) as part of IAS High Energy
Theory Monday Seminar Series\n\n\nAbstract\nIt is possible to find simple
boundary duals to bulk operators in the causal wedge using the bulk equati
ons of motion. By contrast\, it has been suggested that operators behind a
non-minimal extremal surface (in a python’s lunch) are encoded on the b
oundary with exponential complexity. There is generically a large gap regi
on between the causal wedge and the python's lunch. To close this gap\, I
will argue that causal wedges can always be expanded using appropriate sou
rces and multiple boundary time folds. This implies that the operators out
side of the lunch can be simply\, and causally\, reconstructed. I will als
o explain how in some cases\, e.g. in non-evaporating black holes\, python
’s lunches could appear unexpectedly.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/18/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mina Aganagic (University of California\, Berkeley)
DTSTART:20210426T183000Z
DTEND:20210426T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/19
DESCRIPTION:Title: Khovanov Homology from Mirror Symmetry\nby Mina Aganagic
(University of California\, Berkeley) as part of IAS High Energy Theory M
onday Seminar Series\n\n\nAbstract\nKhovanov showed\, more than 20 years a
go\, that there is a deeper theory underlying the Jones polynomial. The``k
not categorification problem” is to find a uniform description of this t
heory\, for all gauge groups\, which originates from physics. I found two
solutions to this problem\, related by a version of two dimensional (homol
ogical) mirror symmetry. They are based on two descriptions of the theory
that lives on defects of the six dimensional (0\,2) CFT\, which are suppor
ted on a link times ``time". \n\nIn this talk\, I will focus on the descri
ption in terms of A-branes\, which is new and surprising. (While the B-bra
ne description is new as well\, it shares flavors of theories mathematicia
ns discovered earlier.) The theory turns out to be solvable explicitly. In
the Khovanov homology case\, the A-model gives a way to compute it which
is significantly more efficient than the algebraic descriptions mathematic
ians have found.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/19/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Leonard Susskind (Stanford University)
DTSTART:20210329T183000Z
DTEND:20210329T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/20
DESCRIPTION:Title: Some Half-Baked Thoughts about de Sitter Space\nby Leona
rd Susskind (Stanford University) as part of IAS High Energy Theory Monday
Seminar Series\n\n\nAbstract\nThe question I will address is: How does th
e holographic principle apply to de Sitter space?\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/20/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ian Moult (Stanford University)
DTSTART:20210503T183000Z
DTEND:20210503T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/21
DESCRIPTION:Title: Conformal Colliders Meet the LHC\nby Ian Moult (Stanford
University) as part of IAS High Energy Theory Monday Seminar Series\n\n\n
Abstract\nLightray operators have played an important role in numerous rec
ent developments in conformal field theory. These operators\, and their as
sociated operator product expansion (OPE)\, also play a central role in co
llider experiments\, where they govern the flow of energy at small angles.
\n\nTaking advantage of recent experimental and theoretical progress in u
nderstanding the structure of jets at the LHC\, a field referred to as jet
substructure\, I will show that one can directly measure the shape depend
ence and scaling properties of multipoint correlators of energy flow opera
tors in LHC data. Remarkably\, the exceptional quality of the data allows
basic properties\, such as the convexity of the twist-two anomalous dimens
ions governing the OPE\, to be immediately seen by eye. This rich dataset
provides an opportunity for an interesting interplay between recent develo
pments in CFT and LHC phenomenology.\n\nIn the second part of the talk\, I
will describe progress in understanding the perturbative structure of mul
tipoint correlators of energy flow operators\, focusing on the case of the
three-point correlator. I will show that the three-point correlator take
s a remarkably simple form in perturbation theory\, admitting a representa
tion in terms of dual Feynman integrals. This perturbative data also provi
des a playground for understanding the lightray OPE in a non-trivial conte
xt\, leading to the observation of some interesting features\, such as ana
lyticity in the transverse spin of the lightray operators appearing in the
OPE.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/21/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Francis Brown (Oxford University)
DTSTART:20210517T183000Z
DTEND:20210517T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/22
DESCRIPTION:Title: Superstring Amplitudes in Genus 0 and Double Copy\nby Fr
ancis Brown (Oxford University) as part of IAS High Energy Theory Monday S
eminar Series\n\n\nAbstract\nThis is joint work with Clément Dupont. Moti
vated by double-copy (Kawai-Lewellen-Tye) formulae relating open and clos
ed superstring amplitudes at tree-level\, I will explain a general double-
copy formula for period integrals on algebraic varieties and its relation
to single-valued functions. As an application\, we deduce a conjecture of
Stieberger which states that the passage from open to closed amplitudes in
string perturbation theory at genus zero is given by the so-called single
-valued map.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/22/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ignacio Cirac (Max-Planck Institut für Quantenoptik)
DTSTART:20210607T183000Z
DTEND:20210607T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/23
DESCRIPTION:Title: Quantum Computing and the Difficulty of Simulating Quantum M
any-Body Systems\nby Ignacio Cirac (Max-Planck Institut für Quantenop
tik) as part of IAS High Energy Theory Monday Seminar Series\n\n\nAbstract
\nQuantum many-body systems are very hard to simulate\, since computationa
l resources (time and memory) typically grow exponentially with the system
size. However\, quantum computers or analog quantum simulators may perfor
m that task in a much more efficient way. In this talk\, I will review som
e of the quantum algorithms that have been proposed for this task and then
explain the advantages\nand disadvantages of analog quantum simulators. I
n particular\, I will describe methods to simulate the dynamics\, to find
ground states\, or compute physical properties at finite temperatures.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/23/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Monica Pate (Harvard University)
DTSTART:20210920T183000Z
DTEND:20210920T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/24
DESCRIPTION:Title: Celestial Operator Product Expansions and $w_{1+infinity}$ S
ymmetry for All Spins\nby Monica Pate (Harvard University) as part of
IAS High Energy Theory Monday Seminar Series\n\nLecture held in Wolfensohn
Hall.\n\nAbstract\nThe operator product expansion of massless celestial p
rimary operators of arbitrary spin is investigated. Poincare symmetry is
found to imply a set of recursion relations on the operator product expans
ion coefficients of the leading singular terms at tree-level in a holomorp
hic limit. The symmetry constraints are solved by an Euler beta function w
ith arguments that depend simply on the right-moving conformal weights of
the operators in the product. These symmetry-derived coefficients are sho
wn not only to match precisely those arising from momentum-space tree-lev
el collinear limits\, but also to obey an infinite number of additional sy
mmetry transformations that respect the algebra of $w_{1+infinity}$. In t
ree-level minimally-coupled gravitational theories\, celestial currents ar
e constructed from light transforms of conformally soft gravitons and foun
d to generate the action of $w_{1+infinity}$ on arbitrary massless celesti
al primaries. Results include operator product expansion coefficients for
fermions as well as those arising from higher-derivative non-minimal coup
lings of gluons and gravitons.\n\nFor more information about in-person att
endance and registration: https://www.ias.edu/sns/events/physics\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/24/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Miguel Montero (Harvard University)
DTSTART:20210927T183000Z
DTEND:20210927T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/25
DESCRIPTION:Title: The anomaly that was not meant IIB\nby Miguel Montero (H
arvard University) as part of IAS High Energy Theory Monday Seminar Series
\n\nLecture held in Wolfensohn Hall.\n\nAbstract\nType IIB supergravity fa
mously has a discrete duality group\, which is an exact symmetry of the fu
ll type IIB string theory. This symmetry has potential quantum anomalies\,
which could render the theory inconsistent. In this talk I will describe
how we computed these anomalies in recent work\, and show they are nonvani
shing\, but remarkably\, they can be cancelled by a subtle modification of
the IIB Chern-Simons term in what amounts to a new variant of the Green-S
chwarz mechanism. This only happens because of some cancellations that dep
end on the precise details of the IIB supergravity spectrum. I will also d
escribe alternative ways to cancel this anomaly\, presenting variant versi
ons of IIB string theory which have the same IIB supergravity as the low-e
nergy limit\, but which differ at the nonperturbative level. These theorie
s may or may not be in the Swampland.\n\nFor more information about in-per
son attendance and registration: https://www.ias.edu/sns/events/physics\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/25/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Adar Sharon (Weizmann Institute of Science)
DTSTART:20211018T183000Z
DTEND:20211018T194500Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/26
DESCRIPTION:Title: The Onset of Quantum Chaos in Disordered Systems\nby Ada
r Sharon (Weizmann Institute of Science) as part of IAS High Energy Theory
Monday Seminar Series\n\n\nAbstract\nWe study the Lyapunov exponent in di
sordered quantum field theories. Generically the Lyapunov exponent can onl
y be computed in isolated CFTs\, and little is known about the way in whic
h chaos grows as we deform the theory away from weak coupling. In this pap
er we describe families of theories in which the disorder coupling is an e
xactly marginal deformation\, allowing us to follow the Lyapunov exponent
from weak to strong coupling. We find surprising behaviors in some cases\,
including a discontinuous transition into chaos. We also describe a new m
ethod allowing for computations in nontrivial CFTs deformed by disorder at
leading order in 1/N.\n\nFor more information about in-person attendance
and registration: https://www.ias.edu/sns/events/physics\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/26/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Shai Chester (Weizmann Institute of Science)
DTSTART:20211115T193000Z
DTEND:20211115T204500Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/27
DESCRIPTION:by Shai Chester (Weizmann Institute of Science) as part of IAS
High Energy Theory Monday Seminar Series\n\nAbstract: TBA\n\nFor more inf
ormation about in-person attendance and registration: https://www.ias.edu/
sns/events/physics\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/27/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ignacio Cirac (Max Planck Institute of Quantum Optics)
DTSTART:20211004T183000Z
DTEND:20211004T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/28
DESCRIPTION:Title: Quantum Circuits\, Cellular Automata and Tensor Networks
\nby Ignacio Cirac (Max Planck Institute of Quantum Optics) as part of IAS
High Energy Theory Monday Seminar Series\n\n\nAbstract\nQuantum computers
employ quantum circuits to implement algorithms. They are composed of qua
ntum gates that act on near neighbors according to some spatial geometry.
They are particular instances of quantum cellular automata (QCA)\, the set
of operators whose action respects both locality and causality. I will sh
ow that QCAs can be effectively represented in terms of tensor networks in
any spatial dimension. As a result\, they obey an area law for the entang
lement entropy they can create. Then\, I will generalize these notions in
two different ways: (i) by replacing unitary operators by quantum channels
\, i.e.\, operations that do not preserve the purity of states\; (ii) by i
ncluding local measurements assisted by classical communication. In the fi
rst case\, the resulting operations still comply with an area law for the
mutual information they can create but\, in general\, cannot be efficientl
y expressed as tensor networks. In the second\, they can still give rise t
o unitary dynamics but cannot be described in terms of QCA in general.\n(J
oint work with Lorenzo Piroli and Goegios Styliaris)\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/28/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michael Levin (University of Chicago)
DTSTART:20211025T183000Z
DTEND:20211025T194500Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/29
DESCRIPTION:Title: Lattice Edge Theories for Topological Phases of Matter\n
by Michael Levin (University of Chicago) as part of IAS High Energy Theory
Monday Seminar Series\n\n\nAbstract\nEdge excitations of (2+1)D topologic
al phases are usually described using continuum field theories. But the bo
undaries of some (2+1)D topological phases can also be described using lat
tice-like edge theories that have a finite dimensional Hilbert space for a
finite size boundary. I will discuss several examples of such finite dime
nsional edge theories. The most interesting examples are ``ungappable'': t
hey have the property that they cannot be gapped by any local interaction.
\n\nFor more information about in-person attendance and registration: http
s://www.ias.edu/sns/events/physics\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/29/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nima Arkani-Hamed (Institute for Advanced Study)
DTSTART:20211026T173000Z
DTEND:20211026T183000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/30
DESCRIPTION:Title: Spacetime and Quantum Mechanics\; Particles and "Strings"\;
Polytopes\, Binary Geometries and Quiver Categories\nby Nima Arkani-Ha
med (Institute for Advanced Study) as part of IAS High Energy Theory Monda
y Seminar Series\n\n\nAbstract\nThe past decade has seen the emergence of
surprising new connections between the real-world physics of elementary pa
rticle scattering processes\, and simple new mathematical structures in co
mbinatorics\, algebra and geometry. These ideas provide\, in a number of e
xamples\, a different starting point for conceptualizing this basic physic
s\, where the fundamental principles of spacetime and quantum mechanics ar
e not taken as primary\, but instead emerge from a more primitive mathemat
ical rubric. In this talk I will illustrate these ideas in their most elem
entary setting\, showing how the simplest particle scattering amplitudes a
re determined by avatars of famous polytopes known as (generalized) associ
ahedra. I will also show how the combinatorial relationships captured by t
he facets of these polytopes remarkably admit a "curvy" realization in ter
ms of "binary geometries"\, with the physical interpretation of generalizi
ng particles to "strings". I will finally discuss the most basic mathemati
cal ideas underlying and generalizing these structures\, involving categor
ies of quiver representations.\n\nFor more information about in-person att
endance and registration: https://www.ias.edu/sns/events/physics\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/30/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kevin Costello (Perimeter Institute)
DTSTART:20220207T193000Z
DTEND:20220207T210000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/31
DESCRIPTION:Title: Scattering Amplitudes in Gauge Theory as Chiral Algebra Corr
elators\nby Kevin Costello (Perimeter Institute) as part of IAS High E
nergy Theory Monday Seminar Series\n\n\nAbstract\nI will report on my rece
nt work with Natalie Paquette\, where we derive expressions for form facto
rs and scattering amplitudes of gauge theory as correlators of a chiral al
gebra. The chiral algebra is closely related to algebras appearing in the
celestial holography program.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/31/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Anatoly Dymarsky (University of Kentucky & Skoltech)
DTSTART:20220314T183000Z
DTEND:20220314T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/32
DESCRIPTION:Title: Codes and Conformal Field Theories\nby Anatoly Dymarsky
(University of Kentucky & Skoltech) as part of IAS High Energy Theory Mond
ay Seminar Series\n\n\nAbstract\nI will review recent progress connecting
(quantum) codes with two-dimensional conformal field theories of the Narai
n type. In the first part of the talk I will show how codes can be used to
construct CFTs with large spectral gap. In the second part I will constru
ct a map from a large class of rational Narain CFTs to quantum stabilizer
codes.\n\nhttps://www.ias.edu/sns/events/ias-high-energy-theory-seminar-13
\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/32/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Amit Sever (Tel-Aviv University)
DTSTART:20220418T183000Z
DTEND:20220418T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/33
DESCRIPTION:Title: Line Operators in Chern-Simons-Matter Theories and Bosonizat
ion in Three Dimensions\nby Amit Sever (Tel-Aviv University) as part o
f IAS High Energy Theory Monday Seminar Series\n\n\nAbstract\nWe study Che
rn-Simons theories at large N with either bosonic or fermionic matter in t
he fundamental representation. The most fundamental operators in these the
ories are mesonic line operators\, the simplest example being Wilson lines
ending on fundamentals. We classify the conformal line operators along an
arbitrary smooth path as well as the spectrum of conformal dimensions and
transverse spins of their boundary operators at finite 't Hooft coupling.
These line operators are shown to satisfy first-order chiral evolution eq
uations\, in which a smooth variation of the path is given by a factorized
product of two line operators. We argue that this equation together with
the spectrum of boundary operators are sufficient to uniquely determine th
e expectation values of these operators. We demonstrate this by bootstrapp
ing the two-point function of the displacement operator on a straight line
. We show that the line operators in the theory of bosons and the theory o
f fermions satisfy the same evolution equation and have the same spectrum
of boundary operators.\n\nhttps://www.ias.edu/sns/events/ias-high-energy-t
heory-seminar-14\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/33/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Javier Fuentes (University of Granada)
DTSTART:20220328T183000Z
DTEND:20220328T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/34
DESCRIPTION:Title: Following the footprints of the B-physics anomalies\nby
Javier Fuentes (University of Granada) as part of IAS High Energy Theory M
onday Seminar Series\n\n\nAbstract\nRecent B-meson data show a reinforced
set of deviations from the Standard Model predictions\, pointing to violat
ions of lepton flavor universality. I will critically review these data an
d discuss their theoretical interpretation\, including their possible conn
ection to the hierarchical pattern of fermions masses and mixing angles. T
o this end\, I will first interpret the data following an effective field
theory approach and later discuss possible UV completions. Complementary c
onstraints and implications for direct searches at LHC will also be discus
sed.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/34/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hong Liu (MIT)
DTSTART:20220404T183000Z
DTEND:20220404T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/35
DESCRIPTION:Title: Emergent Times in Holography\nby Hong Liu (MIT) as part
of IAS High Energy Theory Monday Seminar Series\n\n\nAbstract\nWe discuss
emergent type III1 von Neumann algebraic structures in the large N limit o
f certain class of quantum field theories. We show that this is important
for understanding various aspects of bulk physics in the AdS/CFT duality\,
including explicit boundary constructions of Kruskal-like time evolution
in an eternal black hole\, boundary descriptions of the black hole horizon
s\, the interiors\, and the associated causal structure. If time allows I
will also briefly discuss ongoing work on the boundary emergence of the qu
antum error correcting properties of the bulk description.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/35/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Austin Joyce (University of Chicago)
DTSTART:20220307T193000Z
DTEND:20220307T210000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/36
DESCRIPTION:Title: Static Responses and Symmetries of Black Holes\nby Austi
n Joyce (University of Chicago) as part of IAS High Energy Theory Monday S
eminar Series\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/36/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Javier Magan (University of Pennsylvania)
DTSTART:20211220T193000Z
DTEND:20211220T210000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/37
DESCRIPTION:Title: A new look at completeness and generalized symmetries\nb
y Javier Magan (University of Pennsylvania) as part of IAS High Energy The
ory Monday Seminar Series\n\n\nAbstract\nWe describe a general principle o
f completeness in QFT. It asserts that the physical observable algebras pr
oduced by local degrees of freedom are the maximal ones compatible with ca
usality. We elaborate on equivalent statements to this principle such as t
he non-existence of generalized symmetries and the uniqueness of the net o
f algebras. For non-complete theories\, we explain how the existence of ge
neralized symmetries is unavoidable\, and further\, that they always come
in dual pairs with precisely the same ``size''\, measured by the Jones or
algebraic index. Entropic order/disorder parameters can be defined that se
nse the dual pairs of generalized symmetries and satisfy a relation dubbed
the certainty principle\, due to its connection with the uncertainty prin
ciple in quantum mechanics. Using this new understanding we prove a recent
conjecture by Harlow and Ooguri concerning a universal formula for the ch
arged density of states in QFT\, comment on relations with the Weinberg-Wi
tten theorem\, and argue against the existence of generalized symmetries i
n the bulk of holographic theories.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/37/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lance Dixon (Stanford University)
DTSTART:20220502T183000Z
DTEND:20220502T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/38
DESCRIPTION:Title: Scattering Amplitudes in Maximally Supersymmetric Gauge Theo
ry and a New Duality\nby Lance Dixon (Stanford University) as part of
IAS High Energy Theory Monday Seminar Series\n\n\nAbstract\nScattering amp
litudes are the arena where quantum field theory directly meets collider e
xperiments. An excellent model for scattering in QCD is provided by N=4 s
uper-Yang-Mills theory\, particularly in the planar limit of a large numbe
r of colors\, where the theory becomes integrable\, and amplitudes become
dual to light-like polygonal Wilson-loop expectation values. The first no
ntrivial case is the 6-gluon amplitude (hexagonal Wilson loop)\, which can
be computed to 7 loops using a bootstrap which is based on the rigidity o
f the function space of multiple polylogarithms\, together with a few othe
r conditions. It is also possible to bootstrap a particular form factor\,
for the chiral stress-tensor operator to produce 3 gluons\, through 8 loo
ps. Remarkably\, the two sets of results are related by a mysterious “a
ntipodal” duality\, which exchanges the role of branch cuts and derivati
ves. I will describe how bootstrapping works and what we know about this
new duality.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/38/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tracy Slatyer (MIT)
DTSTART:20221003T183000Z
DTEND:20221003T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/39
DESCRIPTION:Title: Thermal Squeezeout for Strongly Interacting Dark Matter\
nby Tracy Slatyer (MIT) as part of IAS High Energy Theory Monday Seminar S
eries\n\nLecture held in Wolfensohn Hall.\n\nAbstract\nI will discuss the
potential importance of a dark-sector phase transition in the early univer
se in setting the measured relic abundance\, for a simple scenario with st
rongly interacting dark matter. Enhancement of the dark matter density wit
hin shrinking pockets of the high-temperature phase leads to a dramatic re
duction in the late-time dark matter abundance\, allowing for much heavier
dark matter than in the standard thermal freezeout scenario. I will show
results for a class of specific models realizing this scenario\, including
experimental constraints and the effects of entropy injection from decay
of metastable dark-sector particles.\n\nAll in-person attendees must be fu
lly vaccinated\, including a booster dose. Individuals must be prepared to
present proof of vaccination and booster if asked but will not be require
d to submit proof. Masks are optional in all indoor spaces.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/39/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hirosi Ooguri (Caltech & Kavli IPMU)
DTSTART:20231002T183000Z
DTEND:20231002T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/40
DESCRIPTION:Title: Symmetry Resolution at High Energy\nby Hirosi Ooguri (Ca
ltech & Kavli IPMU) as part of IAS High Energy Theory Monday Seminar Serie
s\n\n\nAbstract\nThe density of states of a unitary conformal field theory
is known to have a universal behavior at high energy. In two dimensions\,
this behavior is described by the Cardy formula. If the theory has symmet
ry\, it is interesting to understand the symmetry resolution\, namely the
decomposition of its Hilbert space into irreducible representations of the
symmetry. In this talk\, I will present universal formulas for the symmet
ry resolution with respect to both internal global symmetry and spacetime
symmetry. I will also discuss the entanglement entropy\, the entanglement
spectra\, and the high energy properties of the three-point functions. The
formulas are derived by using thermal effective field theory and are appl
icable to any unitary conformal field theory in arbitrary spacetime dimens
ions.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/40/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Atish Dabholkar (International Centre for Theoretical Physics)
DTSTART:20231009T183000Z
DTEND:20231009T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/41
DESCRIPTION:Title: Finite Entanglement Entropy in String Compactifications\
nby Atish Dabholkar (International Centre for Theoretical Physics) as part
of IAS High Energy Theory Monday Seminar Series\n\n\nAbstract\nI discuss
physical motivations from black hole physics and holography for expecting
finite quantum entanglement entropy in quantum gravity. I describe recent
and earlier results in defining such a notion in perturbative string theor
y by a stringy analog of the replica method using $Z_N$ orbifolds construc
ted for any odd positive integer N. The entropy so defined naturally inclu
des a classical piece and is manifestly UV finite but has potential tachyo
nic IR divergences. I show that for several string compactifications\, the
specific structure of the tachyonic spectrum allows for a re-summation an
d analytic continuation to the physical region 0 < N ≤ 1 where the IR di
vergences are absent and the resulting entropy is finite to one-loop order
.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/41/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Natalia Toro (Stanford University)
DTSTART:20231016T183000Z
DTEND:20231016T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/42
DESCRIPTION:Title: A New Spin on Long-Range Interactions: Continuous Spin Parti
cles and Predictions for their Interactions\nby Natalia Toro (Stanford
University) as part of IAS High Energy Theory Monday Seminar Series\n\n\n
Abstract\nKinematically\, massless particles in Lorentz-invariant theories
are classified by a dimensionful "spin scale"ρ ($2^{nd}$ Casimir invari
ant) that characterizes helicity states' mixing under little group transfo
rmations. However\, dynamics for particles with generic spin scale is poo
rly understood --- all known interacting theories’ massless modes have z
ero spin-scale (and hence exactly Lorentz-invariant helicity)\, and the po
werful no-go theorems that exclude higher spins also presume a vanishing s
pin scale. \n\nI will introduce a field theory for the general case of non
-zero spin scale or "continuous spin" bosons and discuss its coupling t
o matter particles in a Lagrangian formalism. Remarkably\, physical obser
vables are well approximated by familiar theories at frequencies larger th
an ρ\, with calculable and (so far) well behaved infrared deviations at l
ow frequencies and long distances. For example\, our recent work predicts
specific ρ-dependent modifications to the Lorentz force law\, the Larmor
formula\, and Compton scattering\, laying the foundation for experimental
tests of the photon's spin scale. I will also highlight open theoretical q
uestions spurred by this work\, including the localization of matter curre
nts\, the possibility of continuous spin analogues of gravity and non-Abel
ian gauge theories\, and potential connections to the hierarchy problem.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/42/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Erez Urbach (Weizmann Institute of Science)
DTSTART:20231204T193000Z
DTEND:20231204T210000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/43
DESCRIPTION:Title: The Black Hole/String Transition in anti de Sitter Space
\nby Erez Urbach (Weizmann Institute of Science) as part of IAS High Energ
y Theory Monday Seminar Series\n\n\nAbstract\nString stars\, or Horowitz-P
olchinski solutions\, are string theory saddles with normalizable condensa
tes of thermal-winding strings. In the past\, string stars were offered as
a possible description of stringy (Euclidean) black holes in asymptotical
ly flat spacetime\, close to the Hagedorn temperature. I will discuss the
thermodynamic properties of string stars in asymptotically (thermal) anti-
de Sitter background (including AdS3 with NS-NS flux)\, their possible con
nection to small black holes in AdS\, and their implications for holograph
y. I will also present new ``winding-string gas'' saddles for confining ho
lographic backgrounds such as the Witten model\, and their relation to the
deconfined phase of 3+1 pure Yang-Mills.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/43/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mithat Ünsal (North Carolina State University)
DTSTART:20231030T183000Z
DTEND:20231030T200000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/44
DESCRIPTION:Title: Refined Instanton Analysis for Asymptotically Free QFTs and
Mass Gap\nby Mithat Ünsal (North Carolina State University) as part o
f IAS High Energy Theory Monday Seminar Series\n\n\nAbstract\nInstantons a
re an important source of nonperturbative effects in quantum field theorie
s\, but their role in asymptotically free theories has not been well under
stood. In this talk\, we will present a new approach to instanton analysis
in the context of 2d $CP^N$ sigma models. From this\, we will show that\
, contrary to common belief\, instantons can in fact capture the vacuum st
ructure and non-perturbative properties such as mass gap\, fractional thet
a dependence\, and confinement. In the supersymmetric sigma model\, our me
thod gives a new derivation of the mirror symmetry and the Landau-Ginzburg
dual theory.\nOur construction also demonstrates that there is no conflic
t between large N and instantons.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/44/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Martijn Wijnholt (University of Pennsylvania)
DTSTART:20231120T193000Z
DTEND:20231120T210000Z
DTSTAMP:20260422T212858Z
UID:IAS_HighEnergyTheory/45
DESCRIPTION:Title: The M-theory Three-Form and ADE Gauge Symmetry\nby Marti
jn Wijnholt (University of Pennsylvania) as part of IAS High Energy Theory
Monday Seminar Series\n\n\nAbstract\nM- and F-theory compactifications wi
th ADE singularities give rise to non-abelian ADE gauge symmetries. The ph
ysical explanation for this phenomenon involves M2-branes wrapped on vanis
hing cycles. We consider an alternative approach which relies on relating
the M-theory three-form to the Chern-Simons form of a bundle\, and allows
us to address some outstanding questions.\n
LOCATION:https://researchseminars.org/talk/IAS_HighEnergyTheory/45/
END:VEVENT
END:VCALENDAR