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X-WR-CALNAME:IAS Physics
BEGIN:VEVENT
UID:df9e8122-bfb4-44ad-a206-780ef10db95b
DTSTAMP:20210622T234133Z
CREATED:20210311T201736Z
DESCRIPTION:Topic: Some Half-Baked Thoughts about de Sitter Space\n\nSpeake
rs: Leonard Susskind\n\nAffiliation: Stanford University\n\nTO CONNECT TO
THE HET SEMINAR VIA ZOOM\, PLEASE CLICK THE FOLLOWING\nLINK:\n\nhttps://th
eias.zoom.us/j/83432499354?pwd=TkhMZWFJK2E1UzRyeUppU01pZVQwUT09\n\nAbstrac
t: The question I will address is: How does the holographic\nprinciple app
ly to de Sitter space? \n
DTSTART:20210329T183000Z
DTEND:20210329T193000Z
LAST-MODIFIED:20210323T182159Z
LOCATION:via ZOOM
SUMMARY:High Energy Theory Seminar
URL:https://www.ias.edu/events/high-energy-theory-seminar-906
END:VEVENT
BEGIN:VEVENT
UID:d1e0d4dd-1f9b-4ebf-b1a4-ac1c5ce226cf
DTSTAMP:20210622T234133Z
CREATED:20210114T140643Z
DESCRIPTION:Topic: Superconformal Initial Conditions of the Lightcone 6d (2
\,0) Theory\n\nSpeakers: Matthew Heydeman\n\nAffiliation: Member\, School
of Natural Sciences\, IAS\n\nTO CONNECT TO THE HET SEMINAR VIA ZOOM\, PLEA
SE CLICK THE FOLLOWING\nLINK:\nhttps://theias.zoom.us/j/96660745132?pwd=Y3
FPUWVDZlNwUEdINkxjSnNhK0dpZz09\n[https://theias.zoom.us/j/96660745132?pwd=
Y3FPUWVDZlNwUEdINkxjSnNhK0dpZz09]\n\nABSTRACT: Superconformal field theori
es in d<5 permit rich families of\nboundary conditions\, junctions\, and i
nterfaces which may be used to\nengineer new conformal field theories and
explore non-perturbative\nphenomena. Many of these properties descend from
the existence of a 6d\n(2\,0) SCFT on the worldvolume of M5 branes\, but
this theory permits\nno Lagrangian description\, making it difficult to st
udy directly. Two\nclosely related proposals to understand the 6d theory i
nvolve either\nboosting the M-theory system into the infinite momentum fra
me\, leading\nto a matrix model description in terms of 5d instanton parti
cles\;\nalternatively\, one can compactify the 6d theory on a Lorentzian/n
ull\ncircle\, leading to an exotic non-Lorentzian yet Lagrangian 5d SCFT.
\n\nIn this talk\, I present ongoing work joint with Mykola Dedushenko on
\nsuperconformal initial conditions for the null 5d SCFT\, which are\nnatu
ral lightcone analogs of boundary conditions. These\ninitial conditions ma
y be thought of as protected field theory states\narising from QFT on the
Lorentzian half-space\, and we find both\nDirichlet and Neumann conditions
which preserve an unusual amount of\nsupersymmetry. Some comparisons with
the matrix description can be\nmade\, but the field theory viewpoint may
prove to be a more general\nand direct approach. Given this is in-progress
work in a slightly\nexotic setting\, I will encourage discussion and sugg
estions for how to\nexpand on this proposal.\n
DTSTART:20210402T174500Z
DTEND:20210402T190000Z
LAST-MODIFIED:20210330T130127Z
LOCATION:via ZOOM
SUMMARY:High Energy Theory Seminar
URL:https://www.ias.edu/events/high-energy-theory-seminar-898
END:VEVENT
BEGIN:VEVENT
UID:e8eb00fc-c69c-4f7c-9f66-3ceb991a0c55
DTSTAMP:20210622T234133Z
CREATED:20210208T213058Z
DESCRIPTION:Topic: Causal Bulk Reconstruction and the Python’s Lunch\n\nSpe
akers: Arvin Shahbazi-Moghaddam\n\nAffiliation: Stanford University\n\nTO
CONNECT TO THE HET SEMINAR VIA ZOOM\, PLEASE CLICK THE FOLLOWING\nLINK:\n
\nhttps://theias.zoom.us/j/83432499354?pwd=TkhMZWFJK2E1UzRyeUppU01pZVQwUT0
9\n\nAbstract: It is possible to find simple boundary duals to bulk\nopera
tors in the causal wedge using the bulk equations of motion. By\ncontrast\
, it has been suggested that operators behind a non-minimal\nextremal surf
ace (in a python’s lunch) are encoded on the boundary\nwith exponential co
mplexity. There is generically a large gap region\nbetween the causal wedg
e and the python's lunch. To close this gap\, I\nwill argue that causal we
dges can always be expanded\nusing appropriate sources and multiple bounda
ry time folds. This\nimplies that the operators outside of the lunch can b
e simply\, and\ncausally\, reconstructed. I will also explain how in some
cases\, e.g.\nin non-evaporating black holes\, python’s lunches could appe
ar\nunexpectedly.\n
DTSTART:20210412T183000Z
DTEND:20210412T193000Z
LAST-MODIFIED:20210406T150554Z
LOCATION:via ZOOM
SUMMARY:High Energy Theory Seminar
URL:https://www.ias.edu/events/high-energy-theory-seminar-901
END:VEVENT
BEGIN:VEVENT
UID:6013e615-d7c3-4990-a64a-c49158b878ff
DTSTAMP:20210622T234133Z
CREATED:20210301T173258Z
DESCRIPTION:Topic: Spontaneously Broken Boosts in CFTs\n\nSpeakers: Sridip
Pal\n\nAffiliation: Member\, School of Natural Sciences\, IAS\n\nTO CONNEC
T TO THE HET SEMINAR VIA ZOOM\, PLEASE CLICK THE FOLLOWING\nLINK:\nhttps:/
/theias.zoom.us/j/96660745132?pwd=Y3FPUWVDZlNwUEdINkxjSnNhK0dpZz09\n[https
://theias.zoom.us/j/96660745132?pwd=Y3FPUWVDZlNwUEdINkxjSnNhK0dpZz09]\n\nA
BSTRACT: Conformal Field Theories (CFTs) have rich dynamics in heavy\nstat
es. We describe the constraints due to spontaneously broken boost\nand dil
atation symmetries in such states. The spontaneously broken\nboost symmetr
ies require the existence of new low-lying primaries\nwhose scaling dimens
ion gap\, we argue\, scales as O(1). We demonstrate\nthese ideas in variou
s states\, including fluid\, superfluid\, mean field\ntheory\, and Fermi s
urface states. I will go through some of these\nexamples\, present the gen
eral argument and end with some remarks about\nthe large charge limit in 2
d and discuss a theory of a single compact\nboson with an arbitrary confor
mal anomaly (based on\narXiv:2102.12583 [hep-th] with Zohar Komargodski\,
Mark Mezei and Avia\nRaviv-Moshe.)\n
DTSTART:20210416T174500Z
DTEND:20210416T190000Z
LAST-MODIFIED:20210329T152744Z
LOCATION:via ZOOM
SUMMARY:High Energy Theory Seminar
URL:https://www.ias.edu/events/high-energy-theory-seminar-904
END:VEVENT
BEGIN:VEVENT
UID:413c29b4-9a13-42d5-ac61-fd62d05f027b
DTSTAMP:20210622T234133Z
CREATED:20210217T142343Z
DESCRIPTION:Topic: Khovanov Homology from Mirror Symmetry\n\nSpeakers: Mina
Aganagic \n\nAffiliation: University of California\, Berkeley\n\nTO CONNE
CT TO THE HET SEMINAR VIA ZOOM\, PLEASE CLICK THE FOLLOWING\nLINK:\n\nhttp
s://theias.zoom.us/j/83432499354?pwd=TkhMZWFJK2E1UzRyeUppU01pZVQwUT09\n\nA
bstract: Khovanov showed\, more than 20 years ago\, that there is a\ndeepe
r theory underlying the Jones polynomial. The``knot\ncategorification prob
lem” is to find a uniform description of this\ntheory\, for all gauge grou
ps\, which originates from physics. I found\ntwo solutions to this problem
\, related by a version of two dimensional\n(homological) mirror symmetry.
They are based on two descriptions of\nthe theory that lives on defects o
f the six dimensional (0\,2) CFT\,\nwhich are supported on a link times ``
time'. \n\nIn this talk\, I will focus on the description in terms of A-br
anes\,\nwhich is new and surprising. (While the B-brane description is new
as\nwell\, it shares flavors of theories mathematicians discovered\nearli
er.) The theory turns out to be solvable explicitly. In the\nKhovanov homo
logy case\, the A-model gives a way to compute it which is\nsignificantly
more efficient than the algebraic descriptions\nmathematicians have found.
\n
DTSTART:20210426T183000Z
DTEND:20210426T193000Z
LAST-MODIFIED:20210416T131855Z
LOCATION:via ZOOM
SUMMARY:High Energy Theory Seminar
URL:https://www.ias.edu/events/high-energy-theory-seminar-902
END:VEVENT
BEGIN:VEVENT
UID:27240a58-de04-4328-9177-3aa43a089264
DTSTAMP:20210622T234133Z
CREATED:20210301T173108Z
DESCRIPTION:Topic: Worldsheet Correlators in AdS3\n\nSpeakers: Lorenz Eberh
ardt\n\nAffiliation: Member\, School of Natural Sciences\, IAS\n\nTO CONNE
CT TO THE HET SEMINAR VIA ZOOM\, PLEASE CLICK THE FOLLOWING\nLINK:\nhttps:
//theias.zoom.us/j/96660745132?pwd=Y3FPUWVDZlNwUEdINkxjSnNhK0dpZz09\n[http
s://theias.zoom.us/j/96660745132?pwd=Y3FPUWVDZlNwUEdINkxjSnNhK0dpZz09]\n\n
ABSTRACT: We revisit the computation of string correlation functions\nin A
dS3 with pure NS-NS flux from a worldsheet point of view. These\ncorrelato
rs contain all the perturbative information about the\nspacetime CFT and t
he existence of winding strings in AdS3 makes them\nvery rich. We propose
a solution to the problem of computing these\ncorrelators. The winding cor
relators encode information about branched\ncovering maps from the worldsh
eet to the boundary of AdS3. Consistency\nof this proposal leads to many n
ew and non-trivial relations for\nbranched covering maps. I will discuss t
he properties of the\ncorrelators in detail. In some limiting cases one ca
n compute the full\nstring correlators and explore the spacetime CFT direc
tly.\n
DTSTART:20210430T174500Z
DTEND:20210430T190000Z
LAST-MODIFIED:20210426T153918Z
LOCATION:via ZOOM
SUMMARY:High Energy Theory Seminar
URL:https://www.ias.edu/events/high-energy-theory-seminar-903
END:VEVENT
BEGIN:VEVENT
UID:90c8f736-4280-419c-8e39-28acd5039896
DTSTAMP:20210622T234133Z
CREATED:20210312T151128Z
DESCRIPTION:Topic: Conformal Colliders Meet the LHC\n\nSpeakers: Ian Moult
\n\nAffiliation: Stanford University\n\nTO CONNECT TO THE HET SEMINAR VIA
ZOOM\, PLEASE CLICK THE FOLLOWING\nLINK:\n\nhttps://theias.zoom.us/j/83432
499354?pwd=TkhMZWFJK2E1UzRyeUppU01pZVQwUT09\n\nAbstract: Lightray operator
s have played an important role in\nnumerous recent developments in confor
mal field theory. These\noperators\, and their associated operator product
expansion (OPE)\, also\nplay a central role in collider experiments\, whe
re they govern the\nflow of energy at small angles. \n\nTaking advantage o
f recent experimental and theoretical progress in\nunderstanding the struc
ture of jets at the LHC\, a field referred to as\njet substructure\, I wil
l show that one can directly measure the shape\ndependence and scaling pro
perties of multipoint correlators of energy\nflow operators in LHC data. R
emarkably\, the exceptional quality of the\ndata allows basic properties\,
such as the convexity of the twist-two\nanomalous dimensions governing th
e OPE\, to be immediately seen by eye.\nThis rich dataset provides an oppo
rtunity for an interesting interplay\nbetween recent developments in CFT a
nd LHC phenomenology.\n\nIn the second part of the talk\, I will describe
progress in\nunderstanding the perturbative structure of multipoint correl
ators of\nenergy flow operators\, focusing on the case of the three-point
\ncorrelator. I will show that the three-point correlator takes a\nremark
ably simple form in perturbation theory\, admitting a\nrepresentation in t
erms of dual Feynman integrals. This perturbative\ndata also provides a pl
ayground for understanding the lightray OPE in\na non-trivial context\, le
ading to the observation of some interesting\nfeatures\, such as analytici
ty in the transverse spin of the lightray\noperators appearing in the OPE.
\n
DTSTART:20210503T183000Z
DTEND:20210503T193000Z
LAST-MODIFIED:20210426T153320Z
LOCATION:via ZOOM
SUMMARY:High Energy Theory Seminar
URL:https://www.ias.edu/events/high-energy-theory-seminar-907
END:VEVENT
BEGIN:VEVENT
UID:2a146d8e-cdd4-40de-8ca2-ffab64b24805
DTSTAMP:20210622T234133Z
CREATED:20210304T190229Z
DESCRIPTION:Topic: Superstring Amplitudes in Genus 0 and Double Copy\n\nSpe
akers: Francis Brown\n\nAffiliation: Oxford University\n\nTO CONNECT TO TH
E HET SEMINAR VIA ZOOM\, PLEASE CLICK THE FOLLOWING\nLINK:\n\nhttps://thei
as.zoom.us/j/83432499354?pwd=TkhMZWFJK2E1UzRyeUppU01pZVQwUT09\n\nAbstract:
This is joint work with Clément Dupont. Motivated by\ndouble-copy (Kawai
-Lewellen-Tye) formulae relating open and closed\nsuperstring amplitudes a
t tree-level\, I will explain a general\ndouble-copy formula for period in
tegrals on algebraic varieties and\nits relation to single-valued function
s. As an application\, we deduce\na conjecture of Stieberger which states
that the passage from open to\nclosed amplitudes in string perturbation th
eory at genus zero is given\nby the so-called single-valued map. \n
DTSTART:20210517T183000Z
DTEND:20210517T193000Z
LAST-MODIFIED:20210510T173340Z
LOCATION:via ZOOM
SUMMARY:High Energy Theory Seminar
URL:https://www.ias.edu/events/high-energy-theory-seminar-905
END:VEVENT
BEGIN:VEVENT
UID:4074d431-cc4a-4bca-a252-f8861a493ede
DTSTAMP:20210622T234133Z
CREATED:20210421T160932Z
DESCRIPTION:Topic: Quantum Computing and the Difficulty of Simulating Quant
um Many-Body Systems\n\nSpeakers: Ignacio Cirac\n\nAffiliation: Max-Planck
Institut für Quantenoptik\n\nTO CONNECT TO THE HET SEMINAR VIA ZOOM\, PLE
ASE CLICK THE FOLLOWING\nLINK:\n\nhttps://theias.zoom.us/j/82957176694?pwd
=amhzSEpzSmphWElxU2s1MUsxTEZydz09\n\nAbstract: Quantum many-body systems a
re very hard to simulate\, since\ncomputational\nresources (time and memor
y) typically grow exponentially with the\nsystem size.\nHowever\, quantum
computers or analog quantum simulators may perform\nthat task\nin a much m
ore efficient way. In this talk\, I will review some of the\nquantum\nalgo
rithms that have been proposed for this task and then explain the\nadvanta
ges\nand disadvantages of analog quantum simulators. In particular\, I wil
l\ndescribe\nmethods to simulate the dynamics\, to find ground states\, or
compute\nphysical\nproperties at finite temperatures.\n
DTSTART:20210607T183000Z
DTEND:20210607T193000Z
LAST-MODIFIED:20210602T135428Z
LOCATION:via ZOOM
SUMMARY:High Energy Theory Seminar
URL:https://www.ias.edu/events/high-energy-theory-seminar-908
END:VEVENT
END:VCALENDAR