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CALSCALE:GREGORIAN
UID:d8a1260f-cb40-4aef-a34a-4f70aea6f52f
X-WR-TIMEZONE:UTC
X-WR-CALNAME:IAS Physics-external
BEGIN:VEVENT
UID:3ff3bfa6-35f2-479f-846c-343f4cbca170
DTSTAMP:20210308T225225Z
CREATED:20201204T173306Z
DESCRIPTION:Topic: From conversation to action - advancing diversity\, incl
usion and belonging\n\nSpeakers: Christopher Stubbs\, Benita Wolff\, and R
uss Porter\n\nAffiliation: Harvard University\n\nWe will share our collect
ive experience in moving Harvard further\nalong the path to fully inclusiv
e excellence. This is a high priority\nfor the science division at Harvard
. We will review our work in\nprogress\, and will describe actions being t
aken at the departmental\nlevel. We look forward to engaging the Princeton
community in a\nconversation for the latter part of the session.\n
DTSTART:20201210T210000Z
DTEND:20201210T220000Z
LAST-MODIFIED:20201204T173740Z
LOCATION:Virtual Event via Zoom
SUMMARY:Princeton University Joint Physics and Astrophysics Seminar Series
on Equity\, Diversity and Inclusion
URL:https://www.ias.edu/sns/events/princeton-university-joint-physics-and-a
strophysics-seminar-series-equity-diversity-0
END:VEVENT
BEGIN:VEVENT
UID:45c14d37-9e53-48e1-83d9-52f19cbc98e8
DTSTAMP:20210308T225225Z
CREATED:20201209T143521Z
DESCRIPTION:Topic: Higher-dimensional generalizations of the Berry curvatur
e for gapped lattice systems\n\nSpeakers: Anton Kapustin\n\nAffiliation: C
altech\n\nhttps://princeton.zoom.us/j/94088206070?pwd=bytmOXVTOC9WekEyczcx
UWZkWnA2QT09\n\nZoom ID: 940 8820 6070\nPasscode: 313103\n\nAbstract: Buil
ding on the work of von Neumann and Wigner\, M. Berry\nshowed that there a
re topologically protected level-crossings in the\nspace of quantum system
s. These level-crossings can be detected using\nthe curvature of the Berry
connection. In this talk I will describe\nanalogs of this for interacting
lattice systems in infinite volume.\nAlthough the Berry connection is ill
-defined for such systems\, one can\nconstruct analogs of the Berry curvat
ure on the parameter space which\nturn out to be closed form of degree d+2
\, where d is the dimension of\nthe lattice. Integrals of these forms prob
e the non-trivial topology\nof the space of gapped lattice systems and can
be used to detect\ntopologically protected gapless points in the phase di
agram. I will\nalso explain the relation between higher Berry curvatures a
nd the\noccurrence of topologically protected gapless edge modes in famili
es\nof gapped lattice systems.\n
DTSTART:20201216T200000Z
DTEND:20201216T210000Z
LAST-MODIFIED:20201215T144831Z
LOCATION:via ZOOM
SUMMARY:Princeton University Condensed Matter Zoom Seminar
URL:https://www.ias.edu/sns/events/princeton-university-condensed-matter-zo
om-seminar
END:VEVENT
BEGIN:VEVENT
UID:0741f3ab-cfc5-4573-83f5-c7984b78d40f
DTSTAMP:20210308T225225Z
CREATED:20210107T193341Z
DESCRIPTION:Topic: Perturbative and Non-perturbative Effects on Cosmologica
l Observables\n\nSpeakers: Victor Gorbenko\n\nAffiliation: Stanford Univer
sity\n\nTo join HET Seminar\, please click link below: \n\nhttps://princ
eton.zoom.us/j/97083413123 \n\nABSTRACT: Initial conditions for the cosmol
ogical evolution of the\nuniverse remain one of the biggest unresolved puz
zles in nature. A\nlarge set of ideas pertaining to this puzzle are based
on the theory\nof inflation — a period of an exponentially fast expansion
of space.\nDespite its conceptual success and a number of experimental\nco
nfirmations\, our understanding of inflation is far from complete.\nThe is
sues include a lack of an efficient formalism for performing\nbasic pertur
bative calculations\, appearance of infrared divergences\,\nas well as mor
e foundational ones\, like an ambiguity in the initial\nconditions for inf
lation itself. In this talk I will review these\nproblems and report on ou
r progress in rectifying them. In particular\,\nI will explain a novel set
of tools for computing the inflationary\ncorrelation functions and demons
trate their properties related to\nfundamental principles like unitarity a
nd causality. In the remaining\npart of the talk\, I will touch upon non-p
erturbative gravitational\neffects that may prove to be important in a con
sistent description of\nthe state of the early universe.\n
DTSTART:20210112T170000Z
DTEND:20210112T180000Z
LAST-MODIFIED:20210107T193440Z
LOCATION:via ZOOM
SUMMARY:Princeton University Special Physics Seminar
URL:https://www.ias.edu/events/princeton-university-special-physics-seminar
-0
END:VEVENT
BEGIN:VEVENT
UID:8910fd17-8577-4061-9d28-45f61d60c489
DTSTAMP:20210308T225225Z
CREATED:20210107T193827Z
DESCRIPTION:Topic: Recent CMS Results on Higgs Boson Physics and Contributi
on to Snowmass 2021\n\nSpeakers: Nan Lu\n\nAffiliation: Caltech\n\nTo join
HET Seminar\, please click link below: \n\nZoom Link: TBA\n\nABSTRACT:
After the discovery of the Higgs boson by the ATLAS and\nCMS experiments a
t the Large Hadron Collider (LHC) at CERN in 2012\,\na new era of studying
the properties of this newly discovered particle\nhas begun. Precision me
asurement of the Higgs boson properties is a\ngolden testbench of the Stan
dard Model and is sensitive to potential\nnew physics. The High Luminosity
Large Hadron Collider (HL-LHC)\, which\nwill increase the dataset by a fa
ctor of ten compared to the LHC\,\noffers an unprecedented opportunity to
study the Higgs boson. Higgs\nboson physics prospects at the HL-LHC thus s
erves as a crucial\nreference point for the planning of future high energy
physics\nexperiments in general. In this seminar\, I will present recent
\nhighlights of Higgs boson physics results from the CMS experiment\nusing
the LHC Run 2 data and introduce CMS\nexperiment’s goal to contribute to
Snowmass 2021\, focusing on\nthe Higgs boson physics prospects at the HL-L
HC. \n
DTSTART:20210112T190000Z
DTEND:20210112T200000Z
LAST-MODIFIED:20210107T193908Z
LOCATION:via ZOOM
SUMMARY:Princeton University High Energy Experiment Seminar
URL:https://www.ias.edu/events/princeton-university-high-energy-experiment-
seminar
END:VEVENT
BEGIN:VEVENT
UID:8d8e048c-8e84-49cd-98f3-658d510a14fa
DTSTAMP:20210308T225225Z
CREATED:20210114T152246Z
DESCRIPTION:Topic: A strategy for progress in particle physics\n\nSpeakers:
Isabel Garcia-Garcia\n\nAffiliation: Kavli Institute\n\nTo join HET Semin
ar\, please click link below: \nhttps://princeton.zoom.us/j/91047308959
\n\nABSTRACT: From dark matter to the strong CP problem to the dynamics\nb
ehind the weak scale\, a variety of observations make for a compelling\nca
se that the Standard Model is an incomplete description of subatomic\nphys
ics. Yet none of these puzzles provides unambiguous guidance on\nhow we sh
ould proceed to find what comes next.I will argue that this\nstate of affa
irs calls for a multi-directional strategy in our quest\nfor physics Beyon
d-the-Standard-Model. Only a combination of new\ntheoretical developments
and original ideas\, confronted with the vast\narray of experiments at our
disposal\, will provide us with the big\npicture we need to move beyond.
\n
DTSTART:20210115T170000Z
DTEND:20210115T180000Z
LAST-MODIFIED:20210114T152424Z
LOCATION:via ZOOM
SUMMARY:Princeton University Special Physics Seminar
URL:https://www.ias.edu/events/princeton-university-special-physics-seminar
-1
END:VEVENT
BEGIN:VEVENT
UID:5731f647-aa28-4973-8c81-49ea0804d5b9
DTSTAMP:20210308T225225Z
CREATED:20210107T194133Z
DESCRIPTION:Topic: Fractons and (fluctuating) hydrodynamics with translatio
n symmetry\n\nSpeakers: Paolo Glorioso\n\nAffiliation: Stanford University
\n\nTo join HET Seminar\, please click link below: \n\nhttps://princeton
.zoom.us/j/98595504817?pwd=QWxDMzFGWjdBdmVBRTFyQmtvajVNQT09 \n\nMeeting
ID: 985 9550 4817\nPasscode: 604268\n\nABSTRACT: Recently there has been a
n intense exploration of systems\ndisplaying fractonic behavior. In the co
ntext of hydrodynamics\, novel\nscalings associated with these excitations
have been found both\ntheoretically and experimentally. However\, when tr
anslation invariance\nis present\, a crucial feature is that fractons poss
ess a nontrivial\nextension of spacetime symmetries. In this talk\, I will
introduce the\nhydrodynamics of fractons with translation symmetry and sh
ow how the\nnovel spacetime symmetry algebra leads to rather exotic featur
es. I\nwill also discuss the regime beyond mean-field theory using an\neff
ective field theory approach. This may contain relevant\nperturbations\, t
hus potentially modifying the naive hydrodynamic\nscaling at very low ener
gy.\n
DTSTART:20210115T184500Z
DTEND:20210115T200000Z
LAST-MODIFIED:20210111T182723Z
LOCATION:via ZOOM
SUMMARY:Princeton University High Energy Theory Seminar
URL:https://www.ias.edu/events/princeton-university-high-energy-theory-semi
nar-14
END:VEVENT
BEGIN:VEVENT
UID:091ff16e-64e6-4ad0-a9cf-3f30bd8f14fd
DTSTAMP:20210308T225225Z
CREATED:20210111T190259Z
DESCRIPTION:Topic: Spacetime Wormholes\n\nSpeakers: Henry Maxfield\n\nAffil
iation: University of California\, Santa Barbara\n\nTo join HET Seminar\,
please click link below: \nhttps://princeton.zoom.us/j/92376449474 \n\nAB
STRACT: Low-energy quantum gravity has recently shown itself to be\nsurpri
singly powerful. Gravity provides geometric descriptions of\nquantum pheno
mena\, with no reference to a UV completion such as string\ntheory. In par
ticular\, the information content of an evaporating black\nhole and its Ha
wking radiation can be calculated\, shedding new light\non the black hole
information problem. A common theme in these results\nis the presence of '
spacetime wormholes': connections between\notherwise-distant points of spa
cetime. But such geometries also appear\nto give rise to classical randomn
ess in the predictions of the theory.\nI will explain how these ideas fit
together and suggest a new\nparadigm for understanding quantum gravity\n
DTSTART:20210118T170000Z
DTEND:20210118T180000Z
LAST-MODIFIED:20210115T211150Z
LOCATION:via ZOOM
SUMMARY:Princeton University Faculty Candidate Seminar
URL:https://www.ias.edu/events/princeton-university-faculty-candidate-semin
ar
END:VEVENT
BEGIN:VEVENT
UID:9887bfd2-5275-4190-bf56-e8c19e4ee554
DTSTAMP:20210308T225225Z
CREATED:20210107T194637Z
DESCRIPTION:Topic: The Time is Now: Findings from TEAM-UP Report to Increas
e the Number of African Americans with Bachelor’s Degree in Physics and As
tronomy\n\nSpeakers: Tabbetha Dobbins\n\nAffiliation: Rowan University\n\n
Abstract: In December 2017\, the American Institute of Physics (AIP)\nconv
ened a committee of a dozen professionals to work alongside of its\nstaff
members to study the persistently low numbers of bachelor’s\ndegrees earne
d in Physics and Astronomy by African American students.\nThe team was com
prised of physicists\, physics educators\, and\nsociologists who took a mu
lti-faceted view of the issues surrounding\nthe student experience. Out of
this two-year long study comes the\nreport titled “The Time is Now: Syste
mic Changes to Increase African\nAmericans with Bachelor’s Degrees in Phys
ics and Astronomy”. This\npresentation will describe some of the most sali
ent features that\nemerged from the study with a specific emphasis on fact
ors related to\nmentoring.\n\nThe Zoom information is as follows:\n\nhttps
://princeton.zoom.us/j/93511620775\nMeeting ID: 935 1162 0775 [callto:9351
1620775]\n\n(There is no passcode but please note that our physics colleag
ues have\nenabled the waiting room.)\n
DTSTART:20210119T210000Z
DTEND:20210119T220000Z
LAST-MODIFIED:20210113T174817Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Seminar Series on Equity\, Diversity and Inclu
sion
URL:https://www.ias.edu/events/princeton-university-seminar-series-equity-d
iversity-and-inclusion
END:VEVENT
BEGIN:VEVENT
UID:83a4b861-cc45-4874-9a62-eab790b4caa0
DTSTAMP:20210308T225225Z
CREATED:20210107T195254Z
DESCRIPTION:Topic: Many-body Physics in Open Quantum Systems\n\nRegistratio
n for this free conference is open at:\nhttp://pcts.princeton.edu/programs
/current/many-body-physics-in-open-quantum-systems/142\n\nORGANIZERS: Vir
Bulchandani\, Amos Chan\, David Huse\, Biao Lian\, Abhinav\nPrem\n\nRecent
experimental advances in controlling quantum coherence present\na new opp
ortunity for understanding the dynamics of open many-body\nquantum systems
driven far out of equilibrium. In particular\, quantum\nsimulators based
on a variety of architectures\, including ultracold\natoms and molecules i
n optical lattices\, trapped ions\, Rydberg gases\,\nand superconducting c
ircuits\, proffer rich playgrounds for addressing\nfundamental questions i
n driven dissipative systems. In contrast to\nclosed quantum systems\, whe
re there are established theoretical and\nnumerical techniques for studyin
g many-body dynamics\, capturing the\ndynamics of open\, strongly interact
ing\, many-body systems efficiently\nand accurately remains a daunting tas
k.\nThis conference will bring together researchers from multiple\ncommuni
ties\, including AMO physics\, condensed matter\, quantum\ninformation\, a
nd quantum optics\, with the aim of addressing open\nchallenges and new di
rections in the field. At the fore will be issues\nof how best to probe th
e dynamics in strongly interacting open\nsystems\, developing new numerica
l methods—including quantum\ntrajectories\, tensor network approaches\, ti
me-dependent DMRG---and\nbuilding theoretical frameworks for describing qu
antum many-body\nnon-equilibrium dynamics\, which extend beyond the Markov
ian master\nequation paradigm.\n
DTSTART:20210121T140000Z
DTEND:20210121T220000Z
LAST-MODIFIED:20210107T195412Z
LOCATION:via ZOOM
SUMMARY:PCTS Conference
URL:https://www.ias.edu/events/pcts-conference-6
END:VEVENT
BEGIN:VEVENT
UID:cd0e4ab6-b9d1-4f3e-9fcc-d2e9da71be2f
DTSTAMP:20210308T225225Z
CREATED:20210107T195501Z
DESCRIPTION:Topic: Many-body Physics in Open Quantum Systems\n\nRegistratio
n for this free conference is open at:\nhttp://pcts.princeton.edu/programs
/current/many-body-physics-in-open-quantum-systems/142\n\nORGANIZERS: Vir
Bulchandani\, Amos Chan\, David Huse\, Biao Lian\, Abhinav\nPrem\n\nRecent
experimental advances in controlling quantum coherence present\na new opp
ortunity for understanding the dynamics of open many-body\nquantum systems
driven far out of equilibrium. In particular\, quantum\nsimulators based
on a variety of architectures\, including ultracold\natoms and molecules i
n optical lattices\, trapped ions\, Rydberg gases\,\nand superconducting c
ircuits\, proffer rich playgrounds for addressing\nfundamental questions i
n driven dissipative systems. In contrast to\nclosed quantum systems\, whe
re there are established theoretical and\nnumerical techniques for studyin
g many-body dynamics\, capturing the\ndynamics of open\, strongly interact
ing\, many-body systems efficiently\nand accurately remains a daunting tas
k.\nThis conference will bring together researchers from multiple\ncommuni
ties\, including AMO physics\, condensed matter\, quantum\ninformation\, a
nd quantum optics\, with the aim of addressing open\nchallenges and new di
rections in the field. At the fore will be issues\nof how best to probe th
e dynamics in strongly interacting open\nsystems\, developing new numerica
l methods—including quantum\ntrajectories\, tensor network approaches\, ti
me-dependent DMRG---and\nbuilding theoretical frameworks for describing qu
antum many-body\nnon-equilibrium dynamics\, which extend beyond the Markov
ian master\nequation paradigm.\n
DTSTART:20210122T140000Z
DTEND:20210122T220000Z
LAST-MODIFIED:20210107T195528Z
LOCATION:via ZOOM
SUMMARY:PCTS Conference
URL:https://www.ias.edu/events/pcts-conference-7
END:VEVENT
BEGIN:VEVENT
UID:5b58ac11-81d7-4636-91d6-5cdafa94e760
DTSTAMP:20210308T225225Z
CREATED:20210114T153839Z
DESCRIPTION:Topic: Modeling the strong-field dynamics of binary neutron sta
r merger\n\nSpeakers: Sebastiano Bernuzzi\n\nAffiliation: Friedrich-Schill
er-Universität Jena\n\nAbstract: The observation of gravitational and elec
tromagnetic waves\nfrom a binary neutron star (BNS) merger in August 2017
conveyed unique\ninformation on the nature of matter at supranuclear densi
ties\, on the\norigin of short-gamma ray burst\, on the production site of
of heavy\nelements in the Universe\, and on cosmography. Future multimess
enger\nobservations of this kind hold will deliver unprecedented insights
on\nsome of the most fundamental physics questions. A crucial and\nnecessa
ry ingredient to interpret BNS observations is the precise\nknowledge of t
he dynamics of the sources. \nI will talk about recent developments on th
e modeling of BNS mergers\nusing simulations in numerical general relativi
ty. I will start\ndiscussing the exploration of the merger remnants and ma
ss ejecta\, and\nthe dependence of the merger outcome on the binary parame
ters and\nphysics processes included in the simulations. I will then discu
ss\ndetailed models of the gravitational signal for the complete\n(inspira
l-merger-postmerger) gravitational spectrum and their\napplication to grav
itational-wave astronomy.\n
DTSTART:20210201T173000Z
DTEND:20210201T183000Z
LAST-MODIFIED:20210126T150925Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Initiative Virtual Seminar Series
URL:https://www.ias.edu/sns/events/princeton-university-gravity-initiative-
virtual-seminar-series
END:VEVENT
BEGIN:VEVENT
UID:2ec6e38d-1a58-49a8-a9d6-7305fbdb2ec4
DTSTAMP:20210308T225225Z
CREATED:20210111T185108Z
DESCRIPTION:Topic: Celestial Holography\n\nRequired but free registration i
s now open on line\nat http://pcts.princeton.edu/programs/current/celestia
l-holography/134\n\nA four-day virtual workshop on recent advancements in
flat space\nholography which will bring together researchers studying asym
ptotic\nsymmetries\, amplitudes\, and CFT bootstrap methods.\n\nTo take ad
vantage of the online nature of this meeting\, in addition to\ninvited tal
ks and topical breakout sessions\, there will be a component\ngeared towar
ds graduate students in this field. This will include a\nshort series of
pedagogical lectures\, as well as a gong show where\nthey can present thei
r work. \n
DTSTART:20210202T150000Z
DTEND:20210202T220000Z
LAST-MODIFIED:20210113T140032Z
LOCATION:via ZOOM
SUMMARY:PCTS Workshop
URL:https://www.ias.edu/events/pcts-workshop-41
END:VEVENT
BEGIN:VEVENT
UID:cee45490-3610-4d80-8aa5-77a02508ca79
DTSTAMP:20210308T225225Z
CREATED:20210111T185313Z
DESCRIPTION:Topic: Celestial Holography\n\nRequired but free registration i
s now open on line\nat http://pcts.princeton.edu/programs/current/celestia
l-holography/134\n\nA four-day virtual workshop on recent advancements in
flat space\nholography which will bring together researchers studying asym
ptotic\nsymmetries\, amplitudes\, and CFT bootstrap methods.\n\nTo take ad
vantage of the online nature of this meeting\, in addition to\ninvited tal
ks and topical breakout sessions\, there will be a component\ngeared towar
ds graduate students in this field. This will include a\nshort series of
pedagogical lectures\, as well as a gong show where\nthey can present thei
r work. \n
DTSTART:20210203T150000Z
DTEND:20210203T220000Z
LAST-MODIFIED:20210113T140116Z
LOCATION:via ZOOM
SUMMARY:PCTS Workshop
URL:https://www.ias.edu/events/pcts-workshop-42
END:VEVENT
BEGIN:VEVENT
UID:4723d24d-71f3-4482-8512-5a85467ea727
DTSTAMP:20210308T225225Z
CREATED:20210111T185337Z
DESCRIPTION:Topic: Celestial Holography\n\nRequired but free registration i
s now open on line\nat http://pcts.princeton.edu/programs/current/celestia
l-holography/134\n\nA four-day virtual workshop on recent advancements in
flat space\nholography which will bring together researchers studying asym
ptotic\nsymmetries\, amplitudes\, and CFT bootstrap methods.\n\nTo take ad
vantage of the online nature of this meeting\, in addition to\ninvited tal
ks and topical breakout sessions\, there will be a component\ngeared towar
ds graduate students in this field. This will include a\nshort series of
pedagogical lectures\, as well as a gong show where\nthey can present thei
r work. \n
DTSTART:20210204T150000Z
DTEND:20210204T220000Z
LAST-MODIFIED:20210113T140152Z
LOCATION:via ZOOM
SUMMARY:PCTS Workshop
URL:https://www.ias.edu/events/pcts-workshop-40
END:VEVENT
BEGIN:VEVENT
UID:9005303f-113b-4de7-a2b4-641206e137e2
DTSTAMP:20210308T225225Z
CREATED:20210111T185357Z
DESCRIPTION:Topic: Celestial Holography\n\nRequired but free registration i
s now open on line\nat http://pcts.princeton.edu/programs/current/celestia
l-holography/134\n\nA four-day virtual workshop on recent advancements in
flat space\nholography which will bring together researchers studying asym
ptotic\nsymmetries\, amplitudes\, and CFT bootstrap methods.\n\nTo take ad
vantage of the online nature of this meeting\, in addition to\ninvited tal
ks and topical breakout sessions\, there will be a component\ngeared towar
ds graduate students in this field. This will include a\nshort series of
pedagogical lectures\, as well as a gong show where\nthey can present thei
r work. \n
DTSTART:20210205T150000Z
DTEND:20210205T220000Z
LAST-MODIFIED:20210113T140245Z
LOCATION:via ZOOM
SUMMARY:PCTS Workshop
URL:https://www.ias.edu/events/pcts-workshop-39
END:VEVENT
BEGIN:VEVENT
UID:0fc9849d-94fa-41a5-98d6-71f8e22ae31f
DTSTAMP:20210308T225225Z
CREATED:20210114T154521Z
DESCRIPTION:Topic: Stable Big Bang Formation\n\nSpeakers: Grigorios Fournod
avlos\n\nAffiliation: Sorbonne Université\n\nIn this talk we will investig
ate the past dynamics of cosmological\nsolutions to Einstein's equations\,
containing a Big Bang singularity.\nMore precisely\, we will focus on the
classical generalized Kasner\nexamples. The celebrated ``singularity'' th
eorem of Hawking states\nthat the past of sufficiently small perturbations
of such solutions\nare causally geodesically incomplete. However\, it is
not in general\nknown whether such a degeneracy is related to the formatio
n of\na curvature singularity. In many cases\, unstable dynamics are\npred
icted\, which adds to the difficulty of the problem. We will\ndiscuss a re
cent joint work with I. Rodnianski and J. Speck that\nclassifies the behav
ior of perturbed solutions in the so-called\nsubcritical regime.\n
DTSTART:20210208T173000Z
DTEND:20210208T183000Z
LAST-MODIFIED:20210202T132219Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Initiative Virtual Seminar Series
URL:https://www.ias.edu/sns/events/princeton-university-gravity-initiative-
virtual-seminar-series-0
END:VEVENT
BEGIN:VEVENT
UID:1c919350-0841-4604-871d-65e931260735
DTSTAMP:20210308T225225Z
CREATED:20210203T191620Z
DESCRIPTION:Topic: The Black Hole Photon Ring\n\nSpeakers: Alex Lupsasca\n
\nAffiliation: Princeton University Gravity Initiative\n\nTo join HET Semi
nar please click link below:\n\nhttps://princeton.zoom.us/j/98595504817?pw
d=QWxDMzFGWjdBdmVBRTFyQmtvajVNQT09\n\nMeeting ID: 985 9550 4817\nPasscode:
604268\nAbstract: The photon ring is a narrow ring-shaped feature\, predi
cted\nby GR but not yet observed\, that appears on images of sources near
a\nblack hole. It is caused by extreme bending of light within a few\nSchw
arzschild radii of the event horizon and provides a direct probe\nof the u
nstable bound photon orbits of the Kerr geometry. I will\nreview the origi
n and structure of the photon ring\, before discussing\nthe prospects for
its future detection. I will argue that the precise\nshape of the observab
le photon ring is remarkably insensitive to the\nastronomical source profi
le and can therefore be used as a stringent\ntest of GR. A space-based int
erferometry experiment targeting the\nphoton ring of M87* could test the K
err nature of the source to the\nsub-sub-percent level.\n
DTSTART:20210212T184500Z
DTEND:20210212T200000Z
LAST-MODIFIED:20210209T141435Z
LOCATION:via ZOOM
SUMMARY:Princeton University High Energy Theory Seminar
URL:https://www.ias.edu/events/princeton-university-high-energy-theory-semi
nar-15
END:VEVENT
BEGIN:VEVENT
UID:10ae147d-929a-4241-be07-727997b7f8cd
DTSTAMP:20210308T225225Z
CREATED:20210114T154623Z
DESCRIPTION:Topic: Symmetries\, Observables\, and Entropy of Black Hole Hor
izons\n\nSpeakers: Antony Speranza\n\nAffiliation: Perimeter Institute\n\n
Abstract: Black holes have long been known to possess\nan entropy proporti
onal to their horizon area\, and an important goal\nin quantum gravity is
to characterize the microstates responsible for\nthis entropy. One way to
approach this task is to\nidentify symmetries of the black hole under whi
ch the microstates\nare expected to transform. In this talk\, I will desc
ribe how a set\nof conformal symmetries can be identified for generic axis
ymmetric\nKilling horizons\, and further show how these symmetries lead to
the\nblack hole entropy via a Cardy formula. I will also\ndiscuss symmet
ries that appear for more generic subregions and\nconstruct an associated
set of charges. In this case\, the area of\nthe bounding surface and a co
llection of curvature invariants appear\nas Casimirs of the resulting symm
etry algebra\, providing an\ninteresting class of observables that can be
associated with\nsubregions in general relativity.\n
DTSTART:20210215T173000Z
DTEND:20210215T183000Z
LAST-MODIFIED:20210208T212305Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Initiative Virtual Seminar Series
URL:https://www.ias.edu/sns/events/princeton-university-gravity-initiative-
virtual-seminar-series-1
END:VEVENT
BEGIN:VEVENT
UID:79f55882-dee2-48c6-9459-5934be005485
DTSTAMP:20210308T225225Z
CREATED:20210114T160854Z
DESCRIPTION:Topic: Minding the Gap: Lessons from LIGO-Virgo’s Biggest Black
Holes\n\nSpeakers: Maya Fishbach\n\nAffiliation: Northwestern University
\n\nAbstract: Stellar theory predicts the existence of a black hole mass\n
gap in the range ~50 to ~120 solar masses resulting from pair\ninstability
supernovae. The binary black holes of LIGO-Virgo's first\ntwo observing r
uns supported this prediction\, showing evidence for a\ndearth of componen
t black hole masses above 45 solar masses.\nMeanwhile\, among the 30+ new
observations from the third observing\nrun\, there are several black holes
that appear to sit above the 45\nsolar mass limit. I will discuss how the
se unexpectedly massive black\nholes fit into our understanding of the bin
ary black hole population.\nThe data are consistent with several scenarios
\, including a mass\ndistribution that evolves with redshift and the possi
bility that\nthe most massive binary system\, GW190521\, straddles the mas
s gap\,\ncontaining an intermediate-mass black hole heavier than 120 solar
\nmasses.\n
DTSTART:20210222T173000Z
DTEND:20210222T183000Z
LAST-MODIFIED:20210212T140914Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Initiative Virtual Seminar Series
URL:https://www.ias.edu/sns/events/princeton-university-gravity-initiative-
virtual-seminar-series-2
END:VEVENT
BEGIN:VEVENT
UID:eb999960-9bb8-4b2b-896c-9540500c4af8
DTSTAMP:20210308T225225Z
CREATED:20210203T192027Z
DESCRIPTION:Topic: Lorentzian Dynamics and Factorization Beyond Rationality
\n\nSpeakers: Ying-Hsuan Lin\n\nAffiliation: Harvard University\n\nTo join
HET Seminar please click link below:\n\nhttps://princeton.zoom.us/j/98595
504817?pwd=QWxDMzFGWjdBdmVBRTFyQmtvajVNQT09\n\nMeeting ID: 985 9550 4817\n
Passcode: 604268\nAbstract: I motivate my talk with three questions in (1+
1)d CFT: (1)\nWhat is the interpretation of correlators in neither Euclide
an nor\nLorentzian regime? (2) Is there a connection between Lorentzian\nd
ynamics and line operators? (3) Can the Verlinde algebra be made\nsense of
in irrational theories? I will argue that the answer to (3)\nis 'yes'\, a
nd via (2) this 'algebra' can put nontrivial unitarity\nbounds ('opacity b
ound') on the conformal Regge limit of four-point\nfunctions. Topological
defect lines play a key role in this story.\nMore details can be found in
my paper 2012.01429.\n
DTSTART:20210222T193000Z
DTEND:20210222T210000Z
LAST-MODIFIED:20210217T141934Z
LOCATION:via ZOOM
SUMMARY:Princeton University High Energy Theory Seminar
URL:https://www.ias.edu/events/princeton-university-high-energy-theory-semi
nar-16
END:VEVENT
BEGIN:VEVENT
UID:75e85a11-49e4-4662-82d7-36c7d6586ee0
DTSTAMP:20210308T225225Z
CREATED:20210203T192317Z
DESCRIPTION:Topic: Comments on the Narain Ensemble of Free CFTs\n\nSpeakers
: Scott Collier\n\nAffiliation: PCTS\, Princeton University\n\nTo join HET
Seminar please click link below:\n\nhttps://princeton.zoom.us/j/985955048
17?pwd=QWxDMzFGWjdBdmVBRTFyQmtvajVNQT09\n\nMeeting ID: 985 9550 4817\nPass
code: 604268\nAbstract: I will discuss the spectral statistics of primary
operators\nin the recently formulated ensemble average of Narain's family
of free\nboson CFTs\, which provides an explicit (though rather exotic) ex
ample\nof an averaged AdS3/CFT2 holographic duality. I will focus on the\n
computation of higher moments of the torus partition function\, and\nwill
present an explicit computation of the spectral form factor of\nthe dual '
U(1) gravity\,' which can be written in terms of a suitable\nanalytic cont
inuation of a degree-two Eisenstein series. I will\nidentify the terms in
the sum over 'geometries' that lead to a\nlate-time plateau in the spectra
l form factor\, and will demonstrate\nthe absence of a linear ramp approac
hing the plateau from below. If\ntime permits\, I will also discuss some o
ngoing work using Narain's\nfamily of CFTs as a testing ground for the inc
orporation of the\nspectral theory of automorphic forms into the two-dimen
sional\nconformal bootstrap. \n
DTSTART:20210226T184500Z
DTEND:20210226T200000Z
LAST-MODIFIED:20210223T140406Z
LOCATION:via ZOOM
SUMMARY:Princeton University High Energy Theory Seminar
URL:https://www.ias.edu/events/princeton-university-high-energy-theory-semi
nar-17
END:VEVENT
BEGIN:VEVENT
UID:5944cbc3-1107-44c1-a852-d647a9ec48a5
DTSTAMP:20210308T225225Z
CREATED:20210114T161043Z
DESCRIPTION:Topic: Horizon-scale Modeling of Black Hole Accretion\n\nSpeake
rs: Eliot Quataert\n\nAffiliation: Princeton University\n\nAbstract: In th
is talk\, I will provide an overview of theoretical\nmodels of black hole
accretion aimed primarily at non-specialists. I\nwill focus in particular
on efforts to understand the dynamics of\, and\nradiation from\, plasma in
the near-horizon environment\, both\nanalytically and using numerical sim
ulations. I will discuss these\nresults in the context of current and fort
hcoming observations\nincluding the Event Horizon Telescope.\n
DTSTART:20210301T173000Z
DTEND:20210301T183000Z
LAST-MODIFIED:20210226T135836Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Initiative Virtual Seminar Series
URL:https://www.ias.edu/sns/events/princeton-university-gravity-initiative-
virtual-seminar-series-3
END:VEVENT
BEGIN:VEVENT
UID:5b598537-9a57-4dbe-9e61-ee282d9bd34c
DTSTAMP:20210308T225225Z
CREATED:20210114T161129Z
DESCRIPTION:Topic: Multi-mouth Traversable Wormholes\n\nSpeakers: Brianna G
rado-White\n\nAffiliation: University of California\, Santa Barbara\n\nAbs
tract: Recently\, several examples of traversable wormholes\nsupported by
well-controlled quantum effects and respecting reasonable\nenergy conditio
ns have been constructed. In this talk\, I will describe\na generalization
of such solutions involving more than two mouths in\nthe same asymptotic
region. These wormholes may be traversed between\nany pair of mouths\, are
four-dimensional\, and are asymptotically flat\nup to the presence of pos
sible magnetic fluxes or cosmic strings that\nextend to infinity. I will a
lso discuss implications for quantum\nentanglement in these systems.\n
DTSTART:20210308T173000Z
DTEND:20210308T183000Z
LAST-MODIFIED:20210308T151109Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Initiative Virtual Seminar Series
URL:https://www.ias.edu/sns/events/princeton-university-gravity-initiative-
virtual-seminar-series-4
END:VEVENT
BEGIN:VEVENT
UID:33727564-1fe6-4031-9b07-b38cbdd46c9d
DTSTAMP:20210308T225225Z
CREATED:20210203T192744Z
DESCRIPTION:Topic: The OPE Randomness Hypothesis and Euclidean Wormholes\n
\nSpeakers: Alex Belin\n\nAffiliation: CERN\n\nTo join HET Seminar please
click link below:\n\nhttps://princeton.zoom.us/j/98595504817?pwd=QWxDMzFGW
jdBdmVBRTFyQmtvajVNQT09\n\nMeeting ID: 985 9550 4817\nPasscode: 604268\nAb
stract: Recent developments in holography indicate that the\nsemi-classica
l Euclidean path-integral of Einstein gravity is much\nmore powerful than
previously anticipated. It is capable of\nreproducing a unitary Page curve
for black hole evaporation and can\neven capture some features of the dis
crete nature of black hole\nmicrostates. Wormhole geometries play a key ro
le in this context. I\nwill propose a mechanism to explain this in the CFT
: the OPE\nRandomness Hypothesis. This ansatz is a generalization of the\n
Eigenstate Thermalization Hypothesis which applies to chaotic CFTs\,\nand
treats OPE coefficients of heavy operators as random variables\nwith a giv
en probability distribution. I will present two applications\nof this fram
ework: First\, it resolves a factorization puzzle in\nAdS_3/CFT_2 due to t
he genus-2 wormhole\, as raised by Maoz and\nMaldacena. Second\, it provid
es an argument against global symmetries\nin quantum gravity.\n
DTSTART:20210308T193000Z
DTEND:20210308T210000Z
LAST-MODIFIED:20210303T144214Z
LOCATION:via ZOOM
SUMMARY:Princeton University High Energy Theory Seminar
URL:https://www.ias.edu/events/princeton-university-high-energy-theory-semi
nar-18
END:VEVENT
BEGIN:VEVENT
UID:6b8bec1e-c603-4b76-9c07-91b84002d931
DTSTAMP:20210308T225225Z
CREATED:20210304T153556Z
DESCRIPTION:Topic: What's on the horizon? A discussion on the scientific p
rospects of the next-generation Event Horizon Telescope\n\nAbstract: The E
vent Horizon Telescope (EHT) has produced the first\nimage of a black hole
for M87\, opening the possibility to test\ngeneral relativity and our und
erstanding of black hole accretion and\nhigh-energy plasma physics. \n\nAs
the community is preparing to take the next steps\, we want to\ndiscuss c
urrent challenges and future prospects of EHT related\nscience.\n\nThis in
formal discussion session will be moderated by Andrew Chael\,\nAlex Lupsas
ca\, Lia Medeiros\, Eliot Quataert and Chris White. \n\n \n
DTSTART:20210310T200000Z
DTEND:20210310T210000Z
LAST-MODIFIED:20210305T141541Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Initiative Special Seminar
URL:https://www.ias.edu/sns/events/princeton-university-gravity-initiative-
special-seminar
END:VEVENT
BEGIN:VEVENT
UID:b5314946-9faf-45cc-af86-620d314c2fa5
DTSTAMP:20210308T225225Z
CREATED:20210203T193145Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Daniel Harlow\n\nAffiliation: MIT\n\nTo
join HET Seminar please click link below:\n\nhttps://princeton.zoom.us/j/
98595504817?pwd=QWxDMzFGWjdBdmVBRTFyQmtvajVNQT09\n\nMeeting ID: 985 9550 4
817\nPasscode: 604268\nAbstract: \n
DTSTART:20210312T184500Z
DTEND:20210312T200000Z
LAST-MODIFIED:20210203T193223Z
LOCATION:via ZOOM
SUMMARY:Princeton University High Energy Theory Seminar
URL:https://www.ias.edu/events/princeton-university-high-energy-theory-semi
nar-19
END:VEVENT
BEGIN:VEVENT
UID:9ac6c248-1b5d-486a-bd1e-b5e1ccf77ed7
DTSTAMP:20210308T225225Z
CREATED:20210114T154847Z
DESCRIPTION:Topic: The Future of the Planck Data\n\n
DTSTART:20210317T120000Z
DTEND:20210317T180000Z
LAST-MODIFIED:20210114T155052Z
LOCATION:Virtual Meeting
SUMMARY:Princeton Gravity Initiative - PCTS Workshop
URL:https://www.ias.edu/sns/events/princeton-gravity-initiative-pcts-worksh
op
END:VEVENT
BEGIN:VEVENT
UID:2e0a1b1f-fc62-4104-99ad-154b707b4174
DTSTAMP:20210308T225225Z
CREATED:20210114T161227Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Chris White\n\n
DTSTART:20210322T163000Z
DTEND:20210322T173000Z
LAST-MODIFIED:20210114T161305Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Initiative Virtual Seminar Series
URL:https://www.ias.edu/sns/events/princeton-university-gravity-initiative-
virtual-seminar-series-6
END:VEVENT
BEGIN:VEVENT
UID:85ef29b4-f727-4f2c-8655-1483b060969a
DTSTAMP:20210308T225225Z
CREATED:20210203T193335Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Grisha Tarnopolskiy\n\nAffiliation: Har
vard University\n\nTo join HET Seminar please click link below:\n\nhttps:/
/princeton.zoom.us/j/98595504817?pwd=QWxDMzFGWjdBdmVBRTFyQmtvajVNQT09\n\nM
eeting ID: 985 9550 4817\nPasscode: 604268\nAbstract: \n
DTSTART:20210326T174500Z
DTEND:20210326T190000Z
LAST-MODIFIED:20210203T193411Z
LOCATION:via ZOOM
SUMMARY:Princeton University High Energy Theory Seminar
URL:https://www.ias.edu/events/princeton-university-high-energy-theory-semi
nar-20
END:VEVENT
BEGIN:VEVENT
UID:2056c13a-46c1-4bab-9c07-4bffbc3387e4
DTSTAMP:20210308T225225Z
CREATED:20210114T161315Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Lydia Bieri\n\n
DTSTART:20210329T163000Z
DTEND:20210329T173000Z
LAST-MODIFIED:20210114T161354Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Initiative Virtual Seminar Series
URL:https://www.ias.edu/sns/events/princeton-university-gravity-initiative-
virtual-seminar-series-7
END:VEVENT
BEGIN:VEVENT
UID:12339b8b-0552-403c-957a-a20d0d8df670
DTSTAMP:20210308T225225Z
CREATED:20210203T193515Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Anatoly Dymarsky\n\nAffiliation: Univer
sity of Kentucky\n\nTo join HET Seminar please click link below:\n\nhttps:
//princeton.zoom.us/j/98595504817?pwd=QWxDMzFGWjdBdmVBRTFyQmtvajVNQT09\n\n
Meeting ID: 985 9550 4817\nPasscode: 604268\nAbstract: \n
DTSTART:20210405T183000Z
DTEND:20210405T200000Z
LAST-MODIFIED:20210203T193538Z
LOCATION:via ZOOM
SUMMARY:Princeton University High Energy Theory Seminar
URL:https://www.ias.edu/events/princeton-university-high-energy-theory-semi
nar-21
END:VEVENT
BEGIN:VEVENT
UID:71c746a7-99dd-4ed2-b52d-195a57aae4e9
DTSTAMP:20210308T225225Z
CREATED:20210203T193627Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Alfredo Guevara\n\nAffiliation: Harvard
University\n\nTo join HET Seminar please click link below:\n\nhttps://pri
nceton.zoom.us/j/98595504817?pwd=QWxDMzFGWjdBdmVBRTFyQmtvajVNQT09\n\nMeeti
ng ID: 985 9550 4817\nPasscode: 604268\nAbstract: \n
DTSTART:20210409T174500Z
DTEND:20210409T190000Z
LAST-MODIFIED:20210203T193702Z
LOCATION:via ZOOM
SUMMARY:Princeton University High Energy Theory Seminar
URL:https://www.ias.edu/events/princeton-university-high-energy-theory-semi
nar-22
END:VEVENT
BEGIN:VEVENT
UID:0f48be75-a31d-45f1-9ada-1e09e0c62e20
DTSTAMP:20210308T225225Z
CREATED:20210114T161401Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Marcelo Disconzi\n\n
DTSTART:20210412T163000Z
DTEND:20210412T173000Z
LAST-MODIFIED:20210114T161437Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Initiative Virtual Seminar Series
URL:https://www.ias.edu/sns/events/princeton-university-gravity-initiative-
virtual-seminar-series-8
END:VEVENT
BEGIN:VEVENT
UID:f7145778-9f9a-4192-be2d-b71ed67b4d70
DTSTAMP:20210308T225225Z
CREATED:20210114T161446Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Claude Warnick\n\n
DTSTART:20210419T163000Z
DTEND:20210419T173000Z
LAST-MODIFIED:20210114T161526Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Initiative Virtual Seminar Series
URL:https://www.ias.edu/sns/events/princeton-university-gravity-initiative-
virtual-seminar-series-9
END:VEVENT
BEGIN:VEVENT
UID:fbaaf29d-433c-498e-abef-ef11d0f1015b
DTSTAMP:20210308T225225Z
CREATED:20210114T161537Z
DESCRIPTION:Topic: TBA\n\nSpeakers: Elisa Maggio\n\n
DTSTART:20210426T163000Z
DTEND:20210426T173000Z
LAST-MODIFIED:20210114T161622Z
LOCATION:Virtual Meeting
SUMMARY:Princeton University Gravity Initiative Virtual Seminar Series
URL:https://www.ias.edu/sns/events/princeton-university-gravity-initiative-
virtual-seminar-series-10
END:VEVENT
END:VCALENDAR