BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:JT\, BTZ and the Island Phenomenon.
DTSTART;VALUE=DATE-TIME:20200612T140000Z
DTEND;VALUE=DATE-TIME:20200612T150000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82457@indico.in2p3.fr
DESCRIPTION:Speakers: Erik Verlinde ()\nWe study a simple model of black h
ole evaporation by considering a 1D QM system coupled to a 2D CFT on a str
ip\, where both the 1D QM system and 2D CFT are chosen to have gravitation
al dual descriptions in terms of black holes in two and three dimensions r
espectively. By making use of the fact that JT gravity can be obtained vi
a dimensional reduction of 3D gravity\, the full system may be represented
as a single BTZ geometry.\, in which the boundary of the strip is mapped
on to end-of the world branes that extend to the horizon. This model exhi
bits and illuminates the notions of quantum entanglement\, quantum extrema
l surfaces and the Island phenomenon in a simple and intuitive geometrical
fashion.\n\n### Recorded version https://youtu.be/7rvMkqVBhbY?t=5773\n\nh
ttps://indico.in2p3.fr/event/19980/contributions/82457/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82457/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Black Holes in string theory with duality twists.
DTSTART;VALUE=DATE-TIME:20200612T100000Z
DTEND;VALUE=DATE-TIME:20200612T110000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82455@indico.in2p3.fr
DESCRIPTION:Speakers: Stefan Vandoren ()\nWe consider 5D supersymmetric bl
ack holes in string theory compactifications that partially break supersym
metry. We compactify type IIB on T^4 and then further compactify on a circ
le with a duality twist to give Minkowski vacua preserving partial supersy
mmetry (N=6\,4\,2\,0) in five dimensions. The effective supergravity theor
y is given by a Scherk-Schwarz reduction with a Scherk-Schwarz supergravit
y potential on the moduli space\, and the lift of this to string theory im
poses a quantization condition on the mass parameters. In this theory\, we
study black holes with three charges that descend from various ten-dimens
ional brane configurations. For each black hole we choose the duality twis
t to be a transformation that preserves the solution\, so that it remains
a supersymmetric solution of the twisted theory with partially broken supe
rsymmetry. We discuss the quantum corrections arising from the twist to th
e pure gauge and mixed gauge-gravitational Chern-Simons terms in the actio
n and the resulting corrections to the black hole entropy.\n\n### Recorded
version https://youtu.be/BMzNHx2wSWo\n\nhttps://indico.in2p3.fr/event/19
980/contributions/82455/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82455/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Panel: Islands\, JT Gravity\, AdS2 holography and Microstate Struc
ture.
DTSTART;VALUE=DATE-TIME:20200611T154500Z
DTEND;VALUE=DATE-TIME:20200611T170000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82454@indico.in2p3.fr
DESCRIPTION:Speakers: Ahmed Almheiri ()\, Juan Maldacena ()\, Samir Mathur
()\, Steve Shenker ()\nModerator: Marika Taylor\n\n### Recorded version:
https://youtu.be/Vr61WnB6Ndw\n\nhttps://indico.in2p3.fr/event/19980/con
tributions/82454/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82454/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The unreasonable effectiveness of semi-classical gravity without m
icrostructure.
DTSTART;VALUE=DATE-TIME:20200611T123000Z
DTEND;VALUE=DATE-TIME:20200611T133000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82452@indico.in2p3.fr
DESCRIPTION:Speakers: Ahmed Almheiri ()\nThis talk will be about some surp
rising results from the semi-classical description of black holes. I will
describe how this regime captures both the Hayden-Preskill protocol as wel
l as the Page curve of evaporating black holes\, indicative of unitary eva
poration. The main tool will be the Island formula\, as extension of the h
olographic entropy prescription to computing the entropy of the Hawking ra
diation. I will briefly mention how this formula is derived from a nonpert
urbative contributions to the replica trick.\n\n### Recorded version: http
s://youtu.be/wzVMDrfaRXA\n\nhttps://indico.in2p3.fr/event/19980/contributi
ons/82452/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82452/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Stringy Structure at the BPS Bound
DTSTART;VALUE=DATE-TIME:20200609T140000Z
DTEND;VALUE=DATE-TIME:20200609T150000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82445@indico.in2p3.fr
DESCRIPTION:Speakers: Emil Martinec ()\nWe explore the stringy structure o
f 1/2-BPS states in little string theory and its AdS3 limit using worldshe
et techniques. Duality in the worldsheet theory maps the geometrical (Lun
in-Mathur) description of these states to a non-compact Landau-Ginsburg mo
del whose superpotential is determined by the fivebrane source configurati
on. Singular limits of the 1/2-BPS configuration space result when the fi
vebrane worldvolume self-intersects\, as can be seen from both sides of th
e duality -- on the Landau-Ginsburg side from the degeneration of the supe
rpotential\, and on the geometrical side from an analysis of D-brane probe
s. These singular limits are a portal to black hole formation via the con
densation of the W-branes that are becoming massless\, and thus exhibit in
the gravitational bulk description the central actors in the non-gravitat
ional dual theory underlying black hole thermodynamics.\n\n### Recorded Ve
rsion: https://youtu.be/MI5-c5-HLC0?t=5330\n\nhttps://indico.in2p3.fr/even
t/19980/contributions/82445/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82445/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The VECRO hypothesis
DTSTART;VALUE=DATE-TIME:20200608T140000Z
DTEND;VALUE=DATE-TIME:20200608T150000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82441@indico.in2p3.fr
DESCRIPTION:Speakers: Samir Mathur ()\nWe consider three fundamental issue
s in quantum gravity: (a) the black hole information paradox (b) the unbou
ndedness of entropy that can be stored inside a black hole horizon (c) the
relation between the black hole horizon and the cosmological horizon. Wi
th help from the small corrections theorem\, we convert each of these issu
es into a sharp conflict. We then argue that all three conflicts can be re
solved by the following hypothesis: The vacuum wavefunctional of quantum
gravity contains a "vecro" component made of virtual fluctuations of conf
igurations of the same type that arise in the fuzzball structure of black
hole microstates. Further\, if we assume that causality holds to leading
order in gently curved spacetime\, then we must necessarily have such a
vecro component in order to resolve the above conflicts. The term vecro
stands for `Virtual Extended Compression-Resistant Objects'\, and charac
terizes the nature of the vacuum fluctuations that resolve the puzzles. It
is interesting that puzzle (c) may relate the role of quantum gravity in
black holes to observations in the sky.\n\n### Recorded version: https://
youtu.be/Li7N8NUpAAw?t=5409\n\nhttps://indico.in2p3.fr/event/19980/contrib
utions/82441/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82441/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Is structure at the horizon required to resolve the information pa
radox?
DTSTART;VALUE=DATE-TIME:20200612T123000Z
DTEND;VALUE=DATE-TIME:20200612T133000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82456@indico.in2p3.fr
DESCRIPTION:Speakers: Suvrat Raju ()\nWe will describe recent work on how
quantum information is stored in quantum gravity in asymptotically flat sp
ace. We will argue that all information that is available on future null i
nfinity can also be obtained from a small region near its past boundary. T
his can be physically understood as the statement that information about t
he black hole microstate is always available outside the black hole. We a
lso show how one can sidestep the "small corrections theorem"\, and resolv
e the "bags of gold paradox". In particular\, this means that the informat
ion paradox\, by itself\, cannot provide a reason for expecting "structure
" near the black-hole horizon.\n\n### Recorded version https://youtu.be/
7rvMkqVBhbY\n\nhttps://indico.in2p3.fr/event/19980/contributions/82456/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82456/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Chaos at the rim of black hole and fuzzball shadows
DTSTART;VALUE=DATE-TIME:20200609T100000Z
DTEND;VALUE=DATE-TIME:20200609T110000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82443@indico.in2p3.fr
DESCRIPTION:Speakers: Jose Morales ()\nWe study the scattering of massless
probes in the vicinity of the photon-sphere of asymptotically AdS/flat bl
ack holes and horizon-free microstate geometries (fuzzballs). We find that
these exhibit a chaotic behaviour characterised by exponentially large de
viations of nearby trajectories and compute the Lyapunov exponent \\lambda
governing the exponential growth. We find that fuzzballs and JMART geomet
ries are characterised by Lyapunov exponents smaller than those associat
ed to Black holes with the same mass providing evidence for the existence
of a universal bound on chaos.\n\n### Recorded version: http://www.youtube
.com/watch?v=jAtq0gO9DSE\n\nhttps://indico.in2p3.fr/event/19980/contributi
ons/82443/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82443/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Making Microstate Geometries Spark Joy: Decluttering using Holomor
phy and Dimensional Reduction
DTSTART;VALUE=DATE-TIME:20200608T123000Z
DTEND;VALUE=DATE-TIME:20200608T133000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82440@indico.in2p3.fr
DESCRIPTION:Speakers: Daniel Mayerson ()\nMicrostates of the three-charge
D1-D5-P black hole - superstrata - are complicated solutions in 6D supergr
avity. I will discuss two ways to make Marie Kondo proud by "decluttering"
and simplifying these solutions. First\, by a clever choice of complex va
riables\, one can quickly generalize the existing (single mode) superstrat
a to contain arbitrary holomorphic functions of these variables. Second\,
some of these superstrata can be dimensionally reduced on a three-sphere t
o three dimensions\, where they take on a much simpler form. I will also d
iscuss why this should "spark joy"\, as these new tools and insights are a
first steps on a path towards constructing and understanding more general
three-charge microstates.\n\n### Recorded version: http://www.youtube.co
m/watch?v=Li7N8NUpAAw\n\nhttps://indico.in2p3.fr/event/19980/contributions
/82440/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82440/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The Great Escape: Tunneling out of Microstate Geometries
DTSTART;VALUE=DATE-TIME:20200609T123000Z
DTEND;VALUE=DATE-TIME:20200609T133000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82444@indico.in2p3.fr
DESCRIPTION:Speakers: Pierre Heidmann ()\nWe discuss the quasi-normal mode
s in asymptotically-flat microstate geometries that have the same charge a
s a D1-D5-P black hole\, but whose long BTZ-like throat ends in a smooth c
ap. In general the wave equation is not separable\, but we find a class of
geometries in which the non-separable term is negligible and we can compu
te the quasi-normal frequencies using WKB methods. The long throats of the
se capped geometries generate large redshifts\, which lead to exceptionall
y-low-energy states with extremely long decay times\, set by the central c
harge of the dual CFT to the power of twice the dimension of the operator
dual to the mode. While these decay times are extremely long\, we also arg
ue that the energy decay is bounded\, at large t\, by log(t)^-2 and is com
parable with the behavior of ultracompact stars\, as one should expect for
microstate geometries.\n\n### Recorded Version: https://www.youtube.com/w
atch?v=MI5-c5-HLC0\n\nhttps://indico.in2p3.fr/event/19980/contributions/82
444/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82444/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gravity and randomness
DTSTART;VALUE=DATE-TIME:20200610T140000Z
DTEND;VALUE=DATE-TIME:20200610T150000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82449@indico.in2p3.fr
DESCRIPTION:Speakers: Jan de Boer ()\n### Recorded Version: https://youtu
.be/31f_2G5DLaw?t=5673\n\nhttps://indico.in2p3.fr/event/19980/contribution
s/82449/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82449/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Entropies of subregions in two dimensional cosmological models
DTSTART;VALUE=DATE-TIME:20200611T140000Z
DTEND;VALUE=DATE-TIME:20200611T150000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82451@indico.in2p3.fr
DESCRIPTION:Speakers: Juan Maldacena ()\nWe discuss a two dimensional cosm
ological model consisting of two dimensional de-Sitter JT gravity plus a C
FT . We compute entropies of subregions of the future asymptotic region.\n
\n\n### Recorded version: https://youtu.be/wzVMDrfaRXA?t=5406\n\nhttps://i
ndico.in2p3.fr/event/19980/contributions/82451/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82451/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Some comments on wormholes and factorization
DTSTART;VALUE=DATE-TIME:20200611T100000Z
DTEND;VALUE=DATE-TIME:20200611T110000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82453@indico.in2p3.fr
DESCRIPTION:Speakers: Phil Saad ()\n### Recorded Version: http://www.youtu
be.com/watch?v=zB99h7iWKOg\n\nhttps://indico.in2p3.fr/event/19980/contribu
tions/82453/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82453/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gravitational wave echoes\, microstates and AdS/CFT
DTSTART;VALUE=DATE-TIME:20200608T100000Z
DTEND;VALUE=DATE-TIME:20200608T110000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82439@indico.in2p3.fr
DESCRIPTION:Speakers: Bert Vercnocke ()\n### Recorded version: http://ww
w.youtube.com/watch?v=bSJS8yWdnrA\n\nhttps://indico.in2p3.fr/event/19980/c
ontributions/82439/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82439/
END:VEVENT
BEGIN:VEVENT
SUMMARY:What AdS_3 holography can tell us about black hole microstates?
DTSTART;VALUE=DATE-TIME:20200610T123000Z
DTEND;VALUE=DATE-TIME:20200610T133000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82448@indico.in2p3.fr
DESCRIPTION:Speakers: Stefano Giusto ()\nFocusing on the paradigmatic exam
ple of the Strominger-Vafa black hole\, I will review the insights on the
gravitational description of black hole microstates coming from the dual 2
D CFT. In particular I will discuss the correlators of "light" probe opera
tors in the "heavy" states representing the microstates and their various
limits.\n\n### Recorded Version: https://www.youtube.com/watch?v=31f_2G5D
Law\n\nhttps://indico.in2p3.fr/event/19980/contributions/82448/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82448/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Session Cancelled
DTSTART;VALUE=DATE-TIME:20200610T100000Z
DTEND;VALUE=DATE-TIME:20200610T110000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82447@indico.in2p3.fr
DESCRIPTION:Speakers: Marika Taylor ()\n### At the request of this morning
’s speaker\, and out of respect for our colleagues who are striking toda
y to protest racial discrimination and institutional violence\, we have ca
ncelled this morning's session of the conference.\n\nhttps://indico.in2p3.
fr/event/19980/contributions/82447/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82447/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Panel: Do typical states have horizons?
DTSTART;VALUE=DATE-TIME:20200610T154500Z
DTEND;VALUE=DATE-TIME:20200610T170000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82450@indico.in2p3.fr
DESCRIPTION:Speakers: Iosif Bena ()\, Jan de Boer ()\, Juan Maldacena ()\,
Samir Mathur ()\, Suvrat Raju ()\nModerator: David Turton\n\n### Recorde
d Version: https://youtu.be/31f_2G5DLaw?t=11367\n\nhttps://indico.in2p3.fr
/event/19980/contributions/82450/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82450/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Panel: Microstates and Chaos
DTSTART;VALUE=DATE-TIME:20200609T154500Z
DTEND;VALUE=DATE-TIME:20200609T170000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82446@indico.in2p3.fr
DESCRIPTION:Speakers: Ben Craps ()\, Douglas Stanford ()\, Emil Martinec (
)\, Iosif Bena ()\nModerator: Costas Bachas\n\n### Recorded Version: https
://youtu.be/MI5-c5-HLC0?t=11684\n\nhttps://indico.in2p3.fr/event/19980/con
tributions/82446/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82446/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Panel: What does BMS and soft hair tell us about microstate struct
ure?
DTSTART;VALUE=DATE-TIME:20200608T154500Z
DTEND;VALUE=DATE-TIME:20200608T170000Z
DTSTAMP;VALUE=DATE-TIME:20201125T143107Z
UID:indico-contribution-19980-82442@indico.in2p3.fr
DESCRIPTION:Speakers: Andrea Puhm ()\, Geoffrey Compère ()\, Malcolm Perr
y ()\nModerator: Guillaume Bossard\n\n### Recorded discussion: https://ww
w.youtube.com/watch?v=NtQJsSiv4Fw\n\nhttps://indico.in2p3.fr/event/19980/c
ontributions/82442/
LOCATION:Via Zoom
URL:https://indico.in2p3.fr/event/19980/contributions/82442/
END:VEVENT
END:VCALENDAR