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BEGIN:VEVENT
SUMMARY:Clifford V. Johnson (University of Southern California)
DTSTART:20200720T174500Z
DTEND:20200720T190000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/1
DESCRIPTION:Title: Non-perturbative Studies of JT Gravity and Supergravit
y using Minimal Strings\nby Clifford V. Johnson (University of Souther
n California) as part of IAS High Energy Theory Monday Seminar Series\n\n\
nAbstract\nVarious Jackiw–Teitelboim (JT) gravity and supergravity theor
ies have been shown (by Saad\, Shenker and Stanford\, and by Stanford and
Witten) to have double scaled random matrix model descriptions\, capturing
the (spacetime) topological perturbative expansion of the partition func
tion using beautiful recursive methods developed by Mirzakhani and others.
I will describe an alternative method for building the matrix model descr
iption\, using techniques from minimal string theory. This method is parti
cularly useful for supplying non-perturbative definitions of the physics.
I apply this to computing - for the first time - the non-perturbative spec
tral density and spectral form factor for several examples.\n
LOCATION:https://stable.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:20260404T094703Z
UID:IAS_HighEnergyTheory/2
DESCRIPTION:Title: Stellar Basins of Gravitationally Bound Particles\
nby Ken Van Tilburg (KITP\, University of California\, Santa Barbara) as p
art of IAS High Energy Theory Monday Seminar Series\n\n\nAbstract\nI will
describe and explore the consequences of a newly identified physical pheno
menon: volumetric stellar emission into gravitationally bound orbits of we
akly coupled particles such as axions\, moduli\, hidden photons\, and neut
rinos. While only a tiny fraction of the instantaneous luminosity of a sta
r (the vast majority of the emission is into relativistic modes)\, the con
tinual injection of these particles into a small part of phase space cause
s them to accumulate over astrophysically long time scales\, forming what
I call a "stellar basin"\, in analogy with the geologic kind. The energy d
ensity of the Solar basin can surpass that of the relativistic Solar flux
at Earth's location after only a million years\, for any sufficiently long
-lived particle produced through an emission process whose matrix elements
are unsuppressed at low momentum. This observation has immediate and stri
king consequences for direct detection experiments---including new limits
on axion and hidden-photon parameter space independent of dark matter assu
mptions---and may also increase the prospects for indirect detection of we
akly interacting particles around stars.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Xi Dong (University of California\, Santa Barbara)
DTSTART:20200817T183000Z
DTEND:20200817T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/3
DESCRIPTION:Title: Enhanced Corrections to the Page Curve near Holographi
c Entanglement Transitions\nby Xi Dong (University of California\, San
ta Barbara) as part of IAS High Energy Theory Monday Seminar Series\n\n\nA
bstract\nI will present enhanced corrections to the entanglement entropy o
f a subsystem in holographic states. These corrections appear near phase
transitions in the entanglement entropy due to competing extremal surfaces
\, and they are holographic avatars of similar corrections previously foun
d in chaotic energy eigenstates. I will first show explicitly how to find
these corrections in chaotic eigenstates by summing over contributions of
all bulk saddle point solutions\, including those that break the replica
symmetry\, and by making use of fixed-area states. I will then comment on
several intriguing features of this tractable example and discuss a way o
f understanding these enhanced corrections in other\, more general hologra
phic examples.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andy Neitzke (Yale University)
DTSTART:20200824T174500Z
DTEND:20200824T190000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/4
DESCRIPTION:Title: An update on exact WKB and supersymmetric field theory
\nby Andy Neitzke (Yale University) as part of IAS High Energy Theory
Monday Seminar Series\n\n\nAbstract\nOver the last decade it has become cl
ear that there is a close connection between the BPS sector of N=2 supersy
mmetric field theories in four dimensions and the exact WKB method for ana
lysis of ordinary differential equations (Schrodinger equations and their
higher-order analogues). I will review the basic players in this story and
some of the main results\, and describe some outstanding puzzles.\n
LOCATION:https://stable.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:20260404T094703Z
UID:IAS_HighEnergyTheory/5
DESCRIPTION:Title: Non-Symmetries\, Naturalness\, and Two-Dimensional Adj
oint QCD\nby Zohar Komargodski (Simons Center for Geometry and Physics
\, Stony Brook University) as part of IAS High Energy Theory Monday Semin
ar Series\n\n\nAbstract\nWe will explain the notion of "non-symmetries" or
"defect symmetries." We will show that massless two-dimensional QCD admit
s exponentially many such symmetries. We will use them to prove deconfinem
ent as well as to compute exactly the tension of all k-strings in the smal
l mass limit. Finally\, we will discuss quartic fermion deformations and e
xhibit some unexpected phases which we can determine using the defect symm
etries.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Thomas Faulkner (University of Illinois Urbana-Champaign)
DTSTART:20200928T183000Z
DTEND:20200928T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/6
DESCRIPTION:Title: The Holographic Map as a Conditional Expectation\n
by Thomas Faulkner (University of Illinois Urbana-Champaign) as part of IA
S High Energy Theory Monday Seminar Series\n\n\nAbstract\nI will demonstra
te that holographic error correcting codes naturally give rise to conditio
nal expectations acting on the local operator algebras in the boundary the
ory. I will use this to give simple derivations of some previously known r
esults as well as some new results when multiple boundary/bulk algebras ar
e considered. Connections to the theory of QFT superselection sectors will
be discussed. I will also discuss some shortcomings of these codes as mod
els of AdS/CFT.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Senthil Todadri (Massachusetts Institute of Technology)
DTSTART:20201012T183000Z
DTEND:20201012T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/7
DESCRIPTION:Title: Compressible Quantum Matter: General Constraints\, Eme
rgent Symmetries\, and Anomalies\nby Senthil Todadri (Massachusetts In
stitute of Technology) as part of IAS High Energy Theory Monday Seminar Se
ries\n\n\nAbstract\nI will discuss properties of phases of matter in syste
ms with a global U(1) symmetry and a (possibly discrete) translation symme
try. \n\nThe low energy theory of such systems is strongly constrained by
these symmetries. I will give a framework to understand such constraints
in great generality\, vastly generalizing old theorems. The most powerful
constraint comes about if the system is compressible\, in which case the
low-energy theory must have a very large emergent symmetry group -- large
r than any compact Lie group. A familiar example is a Landau Fermi liqui
d\, whose properties I will revisit from a modern point of view of charac
terizing its emergent symmetry and the associated 't Hooft anomaly. Many
\, if not all\, non-Fermi liquids will have the same emergent symmetry gro
up/anomaly as a Fermi liquid (even though they could have very different d
ynamics)\, and this determines some of their universal properties. I will
discuss the implications for understanding the famous "strange metal" phys
ics observed in experiments in some condensed matter systems.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Geoff Penington (Stanford University)
DTSTART:20201026T183000Z
DTEND:20201026T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/8
DESCRIPTION:Title: Leading order corrections to the quantum extremal surf
ace prescription\nby Geoff Penington (Stanford University) as part of
IAS High Energy Theory Monday Seminar Series\n\n\nAbstract\nWe show that a
naïve application of the quantum extremal surface (QES) prescription can
lead to paradoxical results and must be corrected at leading order. The c
orrections arise when there is a second QES (with strictly larger generali
zed entropy 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 careful derivation correctly computes the corrections. Using tools fr
om one-shot quantum Shannon theory (smooth min-and max-entropies)\, we gen
eralize these results to a set of refined conditions that determine whethe
r the QES prescription holds. We find similar refinements to the condition
s needed for entanglement wedge reconstruction (EWR)\, and show how EWR ca
n be reinterpreted as the task of one-shot quantum state merging (using ze
ro-bits rather than classical bits)\, a task gravity is able to achieve op
timally efficiently.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ryan Thorngren (Harvard University)
DTSTART:20201109T193000Z
DTEND:20201109T210000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/9
DESCRIPTION:Title: Adventures in Gapless Topological Phases\nby Ryan
Thorngren (Harvard University) as part of IAS High Energy Theory Monday Se
minar Series\n\n\nAbstract\nA fascinating feature of some gapped systems i
s topological order\, where the system flows to a nontrivial TQFT in the i
nfrared. The gap is often essential to the description of these phases\, s
o it is interesting to ask what happens to them when the gap closes\, and
if there are more general topological phases which require the absence of
a gap. In this talk\, I will describe recent progress in exploring such ph
ases. The talk will follow two main themes: the fate of a gapped SPT phase
at a symmetry breaking transition\, and intrinsically gapless SPT phases
in the presence of an emergent anomaly. I will describe a conjectural bulk
-boundary correspondence which explains the edge modes in both of these ca
ses.\n\nThis talk is based on arXiv:2008.06638 and arXiv:1905.06969.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andrew Strominger (Harvard University)
DTSTART:20201123T193000Z
DTEND:20201123T210000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/10
DESCRIPTION:Title: Progress on Celestial Holography\nby Andrew Strom
inger (Harvard University) as part of IAS High Energy Theory Monday Semina
r Series\n\n\nAbstract\nWe review some recent progress towards understand
ing holographic duality for quantum gravity in asymptotically flat four-
dimensional spacetimes.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Simon Caron-Huot (McGill University)
DTSTART:20201214T193000Z
DTEND:20201214T210000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/12
DESCRIPTION:Title: Causality and Effective Field Theories\nby Simon
Caron-Huot (McGill University) as part of IAS High Energy Theory Monday Se
minar Series\n\n\nAbstract\nDispersion relations are statements of causali
ty. They give sum rules connecting infrared and ultraviolet physics. They
are great. While they originate from optics and quantum field theory\, in
a first part of this talk I will argue that their 'true purpose' is gravit
y\, viewed as a low-energy effective theory. I will present ongoing work m
apping out the space of consistent effective theories\, including recent r
esults in scalar models deriving a sharp version of dimensional analysis s
caling from causality.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/12/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jorrit Kruthoff (Stanford University)
DTSTART:20210125T193000Z
DTEND:20210125T210000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/13
DESCRIPTION:Title: Classical Aspects of Black Hole Interiors\nby Jor
rit Kruthoff (Stanford University) as part of IAS High Energy Theory Monda
y Seminar Series\n\n\nAbstract\nWe will discuss the geometry behind the ho
rizon of various asymptotically AdS black holes when the boundary CFT is d
eformed by a scalar operator. The dynamics of classical GR in the region i
nside the black hole turns out to be rather intricate\, with even fractal
like behavior emerging in some situations. We will see that\, generically\
, in the presence of a scalar deformation\, Cauchy horizons are replaced b
y a spacelike singularity. This motivates a notion of 'holographic' cosmic
censorship. This talk is based on 2004.01192\, 2006.10056 and 2008.12786.
\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/13/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Xiao-Gang Wen (Massachusetts Institute of Technology)
DTSTART:20210201T193000Z
DTEND:20210201T210000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/14
DESCRIPTION:Title: A Categorical and Holographic View of Symmetry\nb
y Xiao-Gang Wen (Massachusetts Institute of Technology) as part of IAS Hig
h Energy Theory Monday Seminar Series\n\n\nAbstract\nA symmetry is usually
described by transformations and an associated group. However\, a symmetr
y can also be described by the conservation of charges\, encoded by their
fusion rule. This leads to a description of symmetry based on fusion categ
ory. However\, only fusion categories that describe excitations of of a t
opological order in one higher dimension correspond to a non-trivial symme
try. In fact\, the symmetry directly correspond to the topological order i
n one higher dimension\, which leads to a holographic view of symmetry.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/14/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Patrick Hayden (Stanford University)
DTSTART:20210215T193000Z
DTEND:20210215T210000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/15
DESCRIPTION:Title: Fault-tolerant qubit from a constant number of compon
ents\nby Patrick Hayden (Stanford University) as part of IAS High Ener
gy Theory Monday Seminar Series\n\n\nAbstract\nWith gate error rates in mu
ltiple technologies now below the threshold required for fault-tolerant qu
antum computation\, the major remaining obstacle to useful quantum computa
tion is scaling\, a challenge greatly amplified by the huge overhead impos
ed by quantum error correction itself. I’ll discuss a new a fault-tolera
nt quantum computing scheme that can nonetheless be assembled from a small
number of experimental components\, potentially dramatically reducing the
engineering challenges associated with building a large-scale fault-toler
ant quantum computer. The architecture couples a single controllable qubit
to a pair of delay lines which terminate in a detector. Below a threshold
noise value for the controllable qubit\, the logical error rate decays ex
ponentially with the square root of the delay line coherence time. The req
uired gates can be implemented using existing technologies in quantum phot
onic and phononic systems. With continued incremental improvements in only
a few components\, we expect these systems to be promising candidates for
demonstrating fault-tolerant quantum computation with comparatively modes
t experimental effort.\n\nBased on joint work with Kianna Wan\, Soonwon Ch
oi\, Isaac Kim and Noah Shutty.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/15/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Surjeet Rajendran (Johns Hopkins University)
DTSTART:20210301T193000Z
DTEND:20210301T210000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/16
DESCRIPTION:Title: Firewalls in General Relativity\nby Surjeet Rajen
dran (Johns Hopkins University) as part of IAS High Energy Theory Monday S
eminar Series\n\n\nAbstract\nWe present spherically symmetric solutions to
Einstein’s equations\, which are equivalent to canonical Schwarzschild
and Reissner-Nordstrom black holes on the exterior\, but with singular (Pl
anck-density) shells at their respective event and inner horizons. The loc
ally measured mass of the shell and the singularity are much larger than t
he asymptotic Arnowitt-Deser-Misner mass. The area of the shell is equal t
o that of the corresponding canonical black hole\, but the physical distan
ce from the shell to the singularity is a Planck length\, suggesting a nat
ural explanation for the scaling of the black hole entropy with area. The
existence of such singular shells enables solutions to the black hole info
rmation problem of Schwarzschild black holes and the Cauchy horizon proble
m of Reissner-Nordstrom black holes. While we cannot rigorously address th
e formation of these solutions\, we suggest plausibility arguments for how
“normal” black hole solutions may evolve into such states. We also di
scuss the stability of these structures.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/16/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Greg Moore (Rutgers University)
DTSTART:20210315T183000Z
DTEND:20210315T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/17
DESCRIPTION:Title: N=2* SU(2) Supersymmetric Yang-Mills Theory and Four-
Manifold Invariants\nby Greg Moore (Rutgers University) as part of IAS
High Energy Theory Monday Seminar Series\n\n\nAbstract\nThis is a continu
ation of a series of talks I have given in recent years reporting on work
with Jan Manschot\, et. al.\n\nThere will be some repetition\, and some up
dates and new results. (See below for some relevant links.)\n\nManschot
and I have revisited the derivation of topological invariants of four-man
ifolds (smooth\, compact\, oriented\, no boundary) using N=2 supersymmetri
c field theory.\n\nFor the N=2* theory topological twisting introduces a
dependence on an ``ultraviolet'' spin-c structure. The dependence on the
ultraviolet spin-c structure is thoroughly investigated in this work in th
e case where the gauge group is SU(2) or SO(3). \n\nA key step in the der
ivation of the invariants involves an integral over the Coulomb branch of
the theory. It should be possible to write a Coulomb branch integral for a
ny class S theory. However\, the present example illustrates some subtlet
ies\, which were not appreciated when the subject was first studied in the
1990's\, in forming a well-defined measure. There has also been recent pr
ogress in evaluating Coulomb branch integrals. This is due to an improved
understanding of the relation of the integrand to Jacobi-Maass forms\, ind
efinite theta functions\, and mock modular forms.\n\nIn the N=2* case the
partition functions are are (mock) modular in the ultraviolet coupling co
nstant and are (suitably) S-duality covariant in that parameter. For b2+>1
the path integral can be explicitly expressed as a finite sum over (infra
red) spin-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 Dona
ldson invariants in terms of the Seiberg-Witten invariants. When the ultra
violet spin-c structure is the canonical one determined by an almost compl
ex structure\, the mass to zero limit reproduces (somewhat surprisingly) t
he results of Vafa and Witten for topologically twisted N=4 SYM. The expre
ssions are also closely related to recent results in enumerative algebraic
geometry due to Gottsche\, Kool\, Nakajima\, and Williams.\n\nPrevious ta
lks closely related to this one:\n\nStringMath 2018: http://www.physics.ru
tgers.edu/~gmoore/StringMath2018-Final.pdf\n\nJMM January 2020: http://www
.physics.rutgers.edu/~gmoore/JMM-Talk-Jan18-2020.pdf\n\nWHCGP July 2020: h
ttp://www.physics.rutgers.edu/~gmoore/WHCGP-July20-2020.pdf\n\nKITP Decemb
er 2020: https://online.kitp.ucsb.edu/online/mod20/moore/\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/17/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Arvin Shahbazi-Moghaddam (Stanford University)
DTSTART:20210412T183000Z
DTEND:20210412T200000Z
DTSTAMP:20260404T094703Z
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
equations of motion. By contrast\, it has been suggested that operators b
ehind a non-minimal extremal surface (in a python’s lunch) are encoded o
n the boundary with exponential complexity. There is generically a large g
ap region between the causal wedge and the python's lunch. To close this g
ap\, I will argue that causal wedges can always be expanded using appropri
ate sources and multiple boundary time folds. This implies that the operat
ors outside of the lunch can be simply\, and causally\, reconstructed. I w
ill also explain how in some cases\, e.g. in non-evaporating black holes\,
python’s lunches could appear unexpectedly.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/18/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mina Aganagic (University of California\, Berkeley)
DTSTART:20210426T183000Z
DTEND:20210426T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/19
DESCRIPTION:Title: Khovanov Homology from Mirror Symmetry\nby Mina A
ganagic (University of California\, Berkeley) as part of IAS High Energy T
heory Monday Seminar Series\n\n\nAbstract\nKhovanov showed\, more than 20
years ago\, that there is a deeper theory underlying the Jones polynomial.
The``knot categorification problem” is to find a uniform description of
this theory\, for all gauge groups\, which originates from physics. I fou
nd two solutions to this problem\, related by a version of two dimensional
(homological) mirror symmetry. They are based on two descriptions of the
theory that lives on defects of the six dimensional (0\,2) CFT\, which are
supported on a link times ``time". \n\nIn this talk\, I will focus on the
description in terms of A-branes\, which is new and surprising. (While th
e B-brane description is new as well\, it shares flavors of theories mathe
maticians discovered earlier.) The theory turns out to be solvable explici
tly. In the Khovanov homology case\, the A-model gives a way to compute it
which is significantly more efficient than the algebraic descriptions mat
hematicians have found.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/19/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Leonard Susskind (Stanford University)
DTSTART:20210329T183000Z
DTEND:20210329T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/20
DESCRIPTION:Title: Some Half-Baked Thoughts about de Sitter Space\nb
y Leonard Susskind (Stanford University) as part of IAS High Energy Theory
Monday Seminar Series\n\n\nAbstract\nThe question I will address is: How
does the holographic principle apply to de Sitter space?\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/20/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ian Moult (Stanford University)
DTSTART:20210503T183000Z
DTEND:20210503T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/21
DESCRIPTION:Title: Conformal Colliders Meet the LHC\nby Ian Moult (S
tanford University) as part of IAS High Energy Theory Monday Seminar Serie
s\n\n\nAbstract\nLightray operators have played an important role in numer
ous recent developments in conformal field theory. These operators\, and t
heir associated operator product expansion (OPE)\, also play a central rol
e in collider experiments\, where they govern the flow of energy at small
angles. \n\nTaking advantage of recent experimental and theoretical progre
ss in understanding the structure of jets at the LHC\, a field referred to
as jet substructure\, I will show that one can directly measure the shape
dependence and scaling properties of multipoint correlators of energy flo
w operators in LHC data. Remarkably\, the exceptional quality of the data
allows basic properties\, such as the convexity of the twist-two anomalous
dimensions governing the OPE\, to be immediately seen by eye. This rich d
ataset provides an opportunity for an interesting interplay between recent
developments in CFT and LHC phenomenology.\n\nIn the second part of the t
alk\, I will describe progress in understanding the perturbative structure
of multipoint correlators of energy flow operators\, focusing on the case
of the three-point correlator. I will show that the three-point correlat
or takes a remarkably simple form in perturbation theory\, admitting a rep
resentation in terms of dual Feynman integrals. This perturbative data als
o provides a playground for understanding the lightray OPE in a non-trivia
l context\, leading to the observation of some interesting features\, such
as analyticity in the transverse spin of the lightray operators appearing
in the OPE.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/21/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Francis Brown (Oxford University)
DTSTART:20210517T183000Z
DTEND:20210517T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/22
DESCRIPTION:Title: Superstring Amplitudes in Genus 0 and Double Copy
\nby Francis Brown (Oxford University) as part of IAS High Energy Theory M
onday Seminar Series\n\n\nAbstract\nThis is joint work with Clément Dupon
t. Motivated by double-copy (Kawai-Lewellen-Tye) formulae relating open a
nd closed superstring amplitudes at tree-level\, I will explain a general
double-copy formula for period integrals on algebraic varieties and its re
lation to single-valued functions. As an application\, we deduce a conject
ure of Stieberger which states that the passage from open to closed amplit
udes in string perturbation theory at genus zero is given by the so-called
single-valued map.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/22/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ignacio Cirac (Max-Planck Institut für Quantenoptik)
DTSTART:20210607T183000Z
DTEND:20210607T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/23
DESCRIPTION:Title: Quantum Computing and the Difficulty of Simulating Qu
antum Many-Body Systems\nby Ignacio Cirac (Max-Planck Institut für Qu
antenoptik) as part of IAS High Energy Theory Monday Seminar Series\n\n\nA
bstract\nQuantum many-body systems are very hard to simulate\, since compu
tational resources (time and memory) typically grow exponentially with the
system size. However\, quantum computers or analog quantum simulators may
perform that task in a much more efficient way. In this talk\, I will rev
iew some of the quantum algorithms that have been proposed for this task a
nd then explain the advantages\nand disadvantages of analog quantum simula
tors. In particular\, I will describe methods to simulate the dynamics\, t
o find ground states\, or compute physical properties at finite temperatur
es.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/23/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Monica Pate (Harvard University)
DTSTART:20210920T183000Z
DTEND:20210920T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/24
DESCRIPTION:Title: Celestial Operator Product Expansions and $w_{1+infin
ity}$ Symmetry for All Spins\nby Monica Pate (Harvard University) as p
art of IAS High Energy Theory Monday Seminar Series\n\nLecture held in Wol
fensohn Hall.\n\nAbstract\nThe operator product expansion of massless cele
stial primary operators of arbitrary spin is investigated. Poincare symme
try is found to imply a set of recursion relations on the operator product
expansion coefficients of the leading singular terms at tree-level in a h
olomorphic limit. The symmetry constraints are solved by an Euler beta fun
ction with arguments that depend simply on the right-moving conformal weig
hts of the operators in the product. These symmetry-derived coefficients
are shown not only to match precisely those arising from momentum-space t
ree-level collinear limits\, but also to obey an infinite number of additi
onal symmetry transformations that respect the algebra of $w_{1+infinity}$
. In tree-level minimally-coupled gravitational theories\, celestial curr
ents are constructed from light transforms of conformally soft gravitons a
nd found to generate the action of $w_{1+infinity}$ on arbitrary massless
celestial primaries. Results include operator product expansion coefficien
ts for fermions as well as those arising from higher-derivative non-minim
al couplings of gluons and gravitons.\n\nFor more information about in-per
son attendance and registration: https://www.ias.edu/sns/events/physics\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/24/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Miguel Montero (Harvard University)
DTSTART:20210927T183000Z
DTEND:20210927T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/25
DESCRIPTION:Title: The anomaly that was not meant IIB\nby Miguel Mon
tero (Harvard University) as part of IAS High Energy Theory Monday Seminar
Series\n\nLecture held in Wolfensohn Hall.\n\nAbstract\nType IIB supergra
vity famously has a discrete duality group\, which is an exact symmetry of
the full type IIB string theory. This symmetry has potential quantum anom
alies\, which could render the theory inconsistent. In this talk I will de
scribe how we computed these anomalies in recent work\, and show they are
nonvanishing\, but remarkably\, they can be cancelled by a subtle modifica
tion of the IIB Chern-Simons term in what amounts to a new variant of the
Green-Schwarz mechanism. This only happens because of some cancellations t
hat depend on the precise details of the IIB supergravity spectrum. I will
also describe alternative ways to cancel this anomaly\, presenting varian
t versions of IIB string theory which have the same IIB supergravity as th
e low-energy limit\, but which differ at the nonperturbative level. These
theories may or may not be in the Swampland.\n\nFor more information about
in-person attendance and registration: https://www.ias.edu/sns/events/phy
sics\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/25/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Adar Sharon (Weizmann Institute of Science)
DTSTART:20211018T183000Z
DTEND:20211018T194500Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/26
DESCRIPTION:Title: The Onset of Quantum Chaos in Disordered Systems\
nby Adar Sharon (Weizmann Institute of Science) as part of IAS High Energy
Theory Monday Seminar Series\n\n\nAbstract\nWe study the Lyapunov exponen
t in disordered quantum field theories. Generically the Lyapunov exponent
can only be computed in isolated CFTs\, and little is known about the way
in which chaos grows as we deform the theory away from weak coupling. In t
his paper we describe families of theories in which the disorder coupling
is an exactly marginal deformation\, allowing us to follow the Lyapunov ex
ponent from weak to strong coupling. We find surprising behaviors in some
cases\, including a discontinuous transition into chaos. We also describe
a new method allowing for computations in nontrivial CFTs deformed by diso
rder at leading order in 1/N.\n\nFor more information about in-person atte
ndance and registration: https://www.ias.edu/sns/events/physics\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/26/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Shai Chester (Weizmann Institute of Science)
DTSTART:20211115T193000Z
DTEND:20211115T204500Z
DTSTAMP:20260404T094703Z
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://stable.researchseminars.org/talk/IAS_HighEnergyTheory/27/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ignacio Cirac (Max Planck Institute of Quantum Optics)
DTSTART:20211004T183000Z
DTEND:20211004T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/28
DESCRIPTION:Title: Quantum Circuits\, Cellular Automata and Tensor Netwo
rks\nby Ignacio Cirac (Max Planck Institute of Quantum Optics) as part
of IAS High Energy Theory Monday Seminar Series\n\n\nAbstract\nQuantum co
mputers employ quantum circuits to implement algorithms. They are composed
of quantum gates that act on near neighbors according to some spatial geo
metry. They are particular instances of quantum cellular automata (QCA)\,
the set of operators whose action respects both locality and causality. I
will show that QCAs can be effectively represented in terms of tensor netw
orks in any spatial dimension. As a result\, they obey an area law for the
entanglement entropy they can create. Then\, I will generalize these noti
ons in two different ways: (i) by replacing unitary operators by quantum c
hannels\, i.e.\, operations that do not preserve the purity of states\; (i
i) by including local measurements assisted by classical communication. In
the first case\, the resulting operations still comply with an area law f
or the mutual information they can create but\, in general\, cannot be eff
iciently expressed as tensor networks. In the second\, they can still give
rise to unitary dynamics but cannot be described in terms of QCA in gener
al.\n(Joint work with Lorenzo Piroli and Goegios Styliaris)\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/28/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michael Levin (University of Chicago)
DTSTART:20211025T183000Z
DTEND:20211025T194500Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/29
DESCRIPTION:Title: Lattice Edge Theories for Topological Phases of Matte
r\nby Michael Levin (University of Chicago) as part of IAS High Energy
Theory Monday Seminar Series\n\n\nAbstract\nEdge excitations of (2+1)D to
pological phases are usually described using continuum field theories. But
the boundaries of some (2+1)D topological phases can also be described us
ing lattice-like edge theories that have a finite dimensional Hilbert spac
e for a finite size boundary. I will discuss several examples of such fini
te dimensional edge theories. The most interesting examples are ``ungappab
le'': they have the property that they cannot be gapped by any local inter
action.\n\nFor more information about in-person attendance and registratio
n: https://www.ias.edu/sns/events/physics\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/29/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nima Arkani-Hamed (Institute for Advanced Study)
DTSTART:20211026T173000Z
DTEND:20211026T183000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/30
DESCRIPTION:Title: Spacetime and Quantum Mechanics\; Particles and "Stri
ngs"\; Polytopes\, Binary Geometries and Quiver Categories\nby Nima Ar
kani-Hamed (Institute for Advanced Study) as part of IAS High Energy Theor
y Monday Seminar Series\n\n\nAbstract\nThe past decade has seen the emerge
nce of surprising new connections between the real-world physics of elemen
tary particle scattering processes\, and simple new mathematical structure
s in combinatorics\, algebra and geometry. These ideas provide\, in a numb
er of examples\, a different starting point for conceptualizing this basic
physics\, where the fundamental principles of spacetime and quantum mecha
nics are not taken as primary\, but instead emerge from a more primitive m
athematical rubric. In this talk I will illustrate these ideas in their mo
st elementary setting\, showing how the simplest particle scattering ampli
tudes are determined by avatars of famous polytopes known as (generalized)
associahedra. I will also show how the combinatorial relationships captur
ed by the facets of these polytopes remarkably admit a "curvy" realization
in terms of "binary geometries"\, with the physical interpretation of gen
eralizing particles to "strings". I will finally discuss the most basic ma
thematical ideas underlying and generalizing these structures\, involving
categories of quiver representations.\n\nFor more information about in-per
son attendance and registration: https://www.ias.edu/sns/events/physics\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/30/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kevin Costello (Perimeter Institute)
DTSTART:20220207T193000Z
DTEND:20220207T210000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/31
DESCRIPTION:Title: Scattering Amplitudes in Gauge Theory as Chiral Algeb
ra Correlators\nby Kevin Costello (Perimeter Institute) as part of IAS
High Energy Theory Monday Seminar Series\n\n\nAbstract\nI will report on
my recent work with Natalie Paquette\, where we derive expressions for for
m factors and scattering amplitudes of gauge theory as correlators of a ch
iral algebra. The chiral algebra is closely related to algebras appearing
in the celestial holography program.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/31/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Anatoly Dymarsky (University of Kentucky & Skoltech)
DTSTART:20220314T183000Z
DTEND:20220314T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/32
DESCRIPTION:Title: Codes and Conformal Field Theories\nby Anatoly Dy
marsky (University of Kentucky & Skoltech) as part of IAS High Energy Theo
ry Monday Seminar Series\n\n\nAbstract\nI will review recent progress conn
ecting (quantum) codes with two-dimensional conformal field theories of th
e Narain 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
construct a map from a large class of rational Narain CFTs to quantum stab
ilizer codes.\n\nhttps://www.ias.edu/sns/events/ias-high-energy-theory-sem
inar-13\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/32/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Amit Sever (Tel-Aviv University)
DTSTART:20220418T183000Z
DTEND:20220418T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/33
DESCRIPTION:Title: Line Operators in Chern-Simons-Matter Theories and Bo
sonization in Three Dimensions\nby Amit Sever (Tel-Aviv University) as
part of IAS High Energy Theory Monday Seminar Series\n\n\nAbstract\nWe st
udy Chern-Simons theories at large N with either bosonic or fermionic matt
er in the fundamental representation. The most fundamental operators in th
ese theories are mesonic line operators\, the simplest example being Wilso
n lines ending on fundamentals. We classify the conformal line operators a
long an arbitrary smooth path as well as the spectrum of conformal dimensi
ons and transverse spins of their boundary operators at finite 't Hooft co
upling. These line operators are shown to satisfy first-order chiral evolu
tion equations\, in which a smooth variation of the path is given by a fac
torized product of two line operators. We argue that this equation togethe
r with the spectrum of boundary operators are sufficient to uniquely deter
mine the expectation values of these operators. We demonstrate this by boo
tstrapping the two-point function of the displacement operator on a straig
ht line. We show that the line operators in the theory of bosons and the t
heory of fermions satisfy the same evolution equation and have the same sp
ectrum of boundary operators.\n\nhttps://www.ias.edu/sns/events/ias-high-e
nergy-theory-seminar-14\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/33/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Javier Fuentes (University of Granada)
DTSTART:20220328T183000Z
DTEND:20220328T200000Z
DTSTAMP:20260404T094703Z
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 T
heory Monday Seminar Series\n\n\nAbstract\nRecent B-meson data show a rein
forced set of deviations from the Standard Model predictions\, pointing to
violations of lepton flavor universality. I will critically review these
data and discuss their theoretical interpretation\, including their possib
le connection to the hierarchical pattern of fermions masses and mixing an
gles. To this end\, I will first interpret the data following an effective
field theory approach and later discuss possible UV completions. Compleme
ntary constraints and implications for direct searches at LHC will also be
discussed.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/34/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hong Liu (MIT)
DTSTART:20220404T183000Z
DTEND:20220404T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/35
DESCRIPTION:Title: Emergent Times in Holography\nby Hong Liu (MIT) a
s part of IAS High Energy Theory Monday Seminar Series\n\n\nAbstract\nWe d
iscuss emergent type III1 von Neumann algebraic structures in the large N
limit of certain class of quantum field theories. We show that this is imp
ortant for understanding various aspects of bulk physics in the AdS/CFT du
ality\, including explicit boundary constructions of Kruskal-like time evo
lution in an eternal black hole\, boundary descriptions of the black hole
horizons\, the interiors\, and the associated causal structure. If time al
lows I will also briefly discuss ongoing work on the boundary emergence of
the quantum error correcting properties of the bulk description.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/35/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Austin Joyce (University of Chicago)
DTSTART:20220307T193000Z
DTEND:20220307T210000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/36
DESCRIPTION:Title: Static Responses and Symmetries of Black Holes\nb
y Austin Joyce (University of Chicago) as part of IAS High Energy Theory M
onday Seminar Series\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/36/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Javier Magan (University of Pennsylvania)
DTSTART:20211220T193000Z
DTEND:20211220T210000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/37
DESCRIPTION:Title: A new look at completeness and generalized symmetries
\nby Javier Magan (University of Pennsylvania) as part of IAS High Ene
rgy Theory Monday Seminar Series\n\n\nAbstract\nWe describe a general prin
ciple of completeness in QFT. It asserts that the physical observable alge
bras produced by local degrees of freedom are the maximal ones compatible
with causality. We elaborate on equivalent statements to this principle su
ch as the non-existence of generalized symmetries and the uniqueness of th
e net of algebras. For non-complete theories\, we explain how the existenc
e of generalized symmetries is unavoidable\, and further\, that they alway
s come in dual pairs with precisely the same ``size''\, measured by the Jo
nes or algebraic index. Entropic order/disorder parameters can be defined
that sense the dual pairs of generalized symmetries and satisfy a relation
dubbed the certainty principle\, due to its connection with the uncertain
ty principle in quantum mechanics. Using this new understanding we prove a
recent conjecture by Harlow and Ooguri concerning a universal formula for
the charged density of states in QFT\, comment on relations with the Wein
berg-Witten theorem\, and argue against the existence of generalized symme
tries in the bulk of holographic theories.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/37/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lance Dixon (Stanford University)
DTSTART:20220502T183000Z
DTEND:20220502T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/38
DESCRIPTION:Title: Scattering Amplitudes in Maximally Supersymmetric Gau
ge Theory and a New Duality\nby Lance Dixon (Stanford University) as p
art of IAS High Energy Theory Monday Seminar Series\n\n\nAbstract\nScatter
ing amplitudes are the arena where quantum field theory directly meets col
lider experiments. An excellent model for scattering in QCD is provided b
y N=4 super-Yang-Mills theory\, particularly in the planar limit of a larg
e number of colors\, where the theory becomes integrable\, and amplitudes
become dual to light-like polygonal Wilson-loop expectation values. The f
irst nontrivial case is the 6-gluon amplitude (hexagonal Wilson loop)\, wh
ich can be computed to 7 loops using a bootstrap which is based on the rig
idity of the function space of multiple polylogarithms\, together with a f
ew other conditions. It is also possible to bootstrap a particular form f
actor\, for the chiral stress-tensor operator to produce 3 gluons\, throug
h 8 loops. Remarkably\, the two sets of results are related by a mysterio
us “antipodal” duality\, which exchanges the role of branch cuts and d
erivatives. I will describe how bootstrapping works and what we know abou
t this new duality.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/38/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tracy Slatyer (MIT)
DTSTART:20221003T183000Z
DTEND:20221003T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/39
DESCRIPTION:Title: Thermal Squeezeout for Strongly Interacting Dark Matt
er\nby Tracy Slatyer (MIT) as part of IAS High Energy Theory Monday Se
minar Series\n\nLecture held in Wolfensohn Hall.\n\nAbstract\nI will discu
ss the potential importance of a dark-sector phase transition in the early
universe in setting the measured relic abundance\, for a simple scenario
with strongly interacting dark matter. Enhancement of the dark matter dens
ity within shrinking pockets of the high-temperature phase leads to a dram
atic reduction in the late-time dark matter abundance\, allowing for much
heavier dark matter than in the standard thermal freezeout scenario. I wil
l show results for a class of specific models realizing this scenario\, in
cluding experimental constraints and the effects of entropy injection from
decay of metastable dark-sector particles.\n\nAll in-person attendees mus
t be fully vaccinated\, including a booster dose. Individuals must be prep
ared to present proof of vaccination and booster if asked but will not be
required to submit proof. Masks are optional in all indoor spaces.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/39/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hirosi Ooguri (Caltech & Kavli IPMU)
DTSTART:20231002T183000Z
DTEND:20231002T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/40
DESCRIPTION:Title: Symmetry Resolution at High Energy\nby Hirosi Oog
uri (Caltech & Kavli IPMU) as part of IAS High Energy Theory Monday Semina
r Series\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 dimen
sions\, this behavior is described by the Cardy formula. If the theory has
symmetry\, it is interesting to understand the symmetry resolution\, name
ly the decomposition of its Hilbert space into irreducible representations
of the symmetry. In this talk\, I will present universal formulas for the
symmetry resolution with respect to both internal global symmetry and spa
cetime symmetry. I will also discuss the entanglement entropy\, the entang
lement spectra\, and the high energy properties of the three-point functio
ns. The formulas are derived by using thermal effective field theory and a
re applicable to any unitary conformal field theory in arbitrary spacetime
dimensions.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/40/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Atish Dabholkar (International Centre for Theoretical Physics)
DTSTART:20231009T183000Z
DTEND:20231009T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/41
DESCRIPTION:Title: Finite Entanglement Entropy in String Compactificatio
ns\nby Atish Dabholkar (International Centre for Theoretical Physics)
as part of IAS High Energy Theory Monday Seminar Series\n\n\nAbstract\nI d
iscuss physical motivations from black hole physics and holography for exp
ecting finite quantum entanglement entropy in quantum gravity. I describe
recent and earlier results in defining such a notion in perturbative strin
g theory by a stringy analog of the replica method using $Z_N$ orbifolds c
onstructed for any odd positive integer N. The entropy so defined naturall
y includes a classical piece and is manifestly UV finite but has potential
tachyonic IR divergences. I show that for several string compactification
s\, the specific structure of the tachyonic spectrum allows for a re-summa
tion and analytic continuation to the physical region 0 < N ≤ 1 where th
e IR divergences are absent and the resulting entropy is finite to one-loo
p order.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/41/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Natalia Toro (Stanford University)
DTSTART:20231016T183000Z
DTEND:20231016T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/42
DESCRIPTION:Title: A New Spin on Long-Range Interactions: Continuous Spi
n Particles and Predictions for their Interactions\nby Natalia Toro (S
tanford University) as part of IAS High Energy Theory Monday Seminar Serie
s\n\n\nAbstract\nKinematically\, massless particles in Lorentz-invariant t
heories are classified by a dimensionful "spin scale"ρ ($2^{nd}$ Casimir
invariant) that characterizes helicity states' mixing under little group
transformations. However\, dynamics for particles with generic spin scale
is poorly understood --- all known interacting theories’ massless modes
have zero spin-scale (and hence exactly Lorentz-invariant helicity)\, and
the powerful no-go theorems that exclude higher spins also presume a vani
shing spin scale. \n\nI will introduce a field theory for the general case
of non-zero spin scale or "continuous spin" bosons and discuss its cou
pling to matter particles in a Lagrangian formalism. Remarkably\, physica
l observables are well approximated by familiar theories at frequencies la
rger than ρ\, with calculable and (so far) well behaved infrared deviatio
ns at low frequencies and long distances. For example\, our recent work pr
edicts specific ρ-dependent modifications to the Lorentz force law\, the
Larmor formula\, and Compton scattering\, laying the foundation for experi
mental tests of the photon's spin scale. I will also highlight open theore
tical questions spurred by this work\, including the localization of matte
r currents\, the possibility of continuous spin analogues of gravity and n
on-Abelian gauge theories\, and potential connections to the hierarchy pro
blem.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/42/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Erez Urbach (Weizmann Institute of Science)
DTSTART:20231204T193000Z
DTEND:20231204T210000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/43
DESCRIPTION:Title: The Black Hole/String Transition in anti de Sitter Sp
ace\nby Erez Urbach (Weizmann Institute of Science) as part of IAS Hig
h Energy Theory Monday Seminar Series\n\n\nAbstract\nString stars\, or Hor
owitz-Polchinski solutions\, are string theory saddles with normalizable c
ondensates of thermal-winding strings. In the past\, string stars were off
ered as a possible description of stringy (Euclidean) black holes in asymp
totically flat spacetime\, close to the Hagedorn temperature. I will discu
ss the thermodynamic properties of string stars in asymptotically (thermal
) anti-de Sitter background (including AdS3 with NS-NS flux)\, their possi
ble connection to small black holes in AdS\, and their implications for ho
lography. I will also present new ``winding-string gas'' saddles for confi
ning holographic backgrounds such as the Witten model\, and their relation
to the deconfined phase of 3+1 pure Yang-Mills.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/43/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mithat Ünsal (North Carolina State University)
DTSTART:20231030T183000Z
DTEND:20231030T200000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/44
DESCRIPTION:Title: Refined Instanton Analysis for Asymptotically Free QF
Ts and Mass Gap\nby Mithat Ünsal (North Carolina State University) as
part of IAS High Energy Theory Monday Seminar Series\n\n\nAbstract\nInsta
ntons are an important source of nonperturbative effects in quantum field
theories\, but their role in asymptotically free theories has not been wel
l understood. In this talk\, we will present a new approach to instanton a
nalysis in the context of 2d $CP^N$ sigma models. From this\, we will sho
w that\, contrary to common belief\, instantons can in fact capture the va
cuum structure and non-perturbative properties such as mass gap\, fraction
al theta dependence\, and confinement. In the supersymmetric sigma model\,
our method gives a new derivation of the mirror symmetry and the Landau-G
inzburg dual theory.\nOur construction also demonstrates that there is no
conflict between large N and instantons.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/44/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Martijn Wijnholt (University of Pennsylvania)
DTSTART:20231120T193000Z
DTEND:20231120T210000Z
DTSTAMP:20260404T094703Z
UID:IAS_HighEnergyTheory/45
DESCRIPTION:Title: The M-theory Three-Form and ADE Gauge Symmetry\nb
y Martijn Wijnholt (University of Pennsylvania) as part of IAS High Energy
Theory Monday Seminar Series\n\n\nAbstract\nM- and F-theory compactificat
ions with ADE singularities give rise to non-abelian ADE gauge symmetries.
The physical explanation for this phenomenon involves M2-branes wrapped o
n vanishing cycles. We consider an alternative approach which relies on re
lating the M-theory three-form to the Chern-Simons form of a bundle\, and
allows us to address some outstanding questions.\n
LOCATION:https://stable.researchseminars.org/talk/IAS_HighEnergyTheory/45/
END:VEVENT
END:VCALENDAR