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BEGIN:VEVENT
SUMMARY:Amihay Hanany (Imperial College London)
DTSTART;VALUE=DATE-TIME:20200514T090000Z
DTEND;VALUE=DATE-TIME:20200514T100000Z
DTSTAMP;VALUE=DATE-TIME:20201031T052000Z
UID:RENC-THEO/1
DESCRIPTION:Title: Higgs mechanism\, Hasse diagrams\, and Quiver subtracti
ons\nby Amihay Hanany (Imperial College London) as part of Rencontres Thé
oriciennes\n\nLecture held in Zoom.\n\nAbstract\nThe Hasse diagram is a ne
w way of thinking about moduli spaces of vacua which are hyperKahler cones
(otherwise known as symplectic singularities) It incorporates the well es
tablished theory behind the Higgs mechanism\, as put forward by Kibble 196
7\, with geometric notions from mathematics\, and modern notions from quiv
er gauge theories.\n
LOCATION:Lecture held in Zoom
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tom Hartman (Resultados de la búsqueda Resultados web Cornell Un
iversity)
DTSTART;VALUE=DATE-TIME:20200528T140000Z
DTEND;VALUE=DATE-TIME:20200528T150000Z
DTSTAMP;VALUE=DATE-TIME:20201031T052000Z
UID:RENC-THEO/2
DESCRIPTION:Title: Replica wormholes and the black hole information parado
x\nby Tom Hartman (Resultados de la búsqueda Resultados web Cornell Univ
ersity) as part of Rencontres Théoriciennes\n\nLecture held in Institut H
enri Poincaré\, Room 314 unless specified otherwise.\n\nAbstract\nI will
review recent progress on the black hole information puzzle involving the
appearance of "islands" in the black hole interior. The islands arise from
the replica trick used to calculate the entropy of Hawking radiation. Thi
s entropy receives large non-perturbative corrections from gravitational i
nstantons called replica wormholes\, which connect multiple copies of the
black hole through the interiors. In several toy models where these contri
butions can be calculated explicitly\, the resulting entropy is consistent
with unitary black hole evaporation.\n
LOCATION:Lecture held in Institut Henri Poincaré\, Room 314 unless specif
ied otherwise
END:VEVENT
BEGIN:VEVENT
SUMMARY:Costas Bachas (École Normale Supérieure)
DTSTART;VALUE=DATE-TIME:20200625T090000Z
DTEND;VALUE=DATE-TIME:20200625T100000Z
DTSTAMP;VALUE=DATE-TIME:20201031T052000Z
UID:RENC-THEO/3
DESCRIPTION:Title: Coupling Holographic Universes\nby Costas Bachas (Écol
e Normale Supérieure) as part of Rencontres Théoriciennes\n\nLecture hel
d in Institut Henri Poincaré\, Room 314 unless specified otherwise.\n\nAb
stract\nHolographic duality describes coupled AdS Universes by the weak
and/or localized coupling of CFTs.\nAfter a brief introduction\, I will d
iscuss two recent results in this context:\n(1) the top down embedding
of massive gravity in string theory\, and (2) the transfer of energy acro
ss a conformal interface.\n
LOCATION:Lecture held in Institut Henri Poincaré\, Room 314 unless specif
ied otherwise
END:VEVENT
BEGIN:VEVENT
SUMMARY:Stephan Stieberger (MPP)
DTSTART;VALUE=DATE-TIME:20200618T090000Z
DTEND;VALUE=DATE-TIME:20200618T100000Z
DTSTAMP;VALUE=DATE-TIME:20201031T052000Z
UID:RENC-THEO/4
DESCRIPTION:Title: Symmetries of celestial amplitudes\nby Stephan Stieberg
er (MPP) as part of Rencontres Théoriciennes\n\nLecture held in Institut
Henri Poincaré\, Room 314 unless specified otherwise.\n\nAbstract\nAbstra
ct: The celestial sphere is the target space for the proposal of flat spac
e holography in which four-dimensional physics is encoded in two-dimension
al celestial conformal field theory (CCFT).\nAfter giving some motivations
we introduce the concepts and properties of physics on the celestial sphe
re.\nWe shall discuss symmetries and properties of celestial amplitudes. A
fter introducing the concept of soft theorems on the celestial sphere we s
hall give an explicit field realization of the operators generating superr
otations and supertranslations. Finally we construct the full extended BMS
Algebra of CCFT.\n
LOCATION:Lecture held in Institut Henri Poincaré\, Room 314 unless specif
ied otherwise
END:VEVENT
BEGIN:VEVENT
SUMMARY:Anatoly Dymarsky (U. Kentucky & Skoltech)
DTSTART;VALUE=DATE-TIME:20200917T130000Z
DTEND;VALUE=DATE-TIME:20200917T140000Z
DTSTAMP;VALUE=DATE-TIME:20201031T052000Z
UID:RENC-THEO/5
DESCRIPTION:Title: Quantum codes\, lattices\, and conformal field theories
\nby Anatoly Dymarsky (U. Kentucky & Skoltech) as part of Rencontres Théo
riciennes\n\nLecture held in online only.\n\nAbstract\nThere is a deep rel
ation between classical error-correcting\ncodes\, Euclidean lattices\, and
chiral 2d CFTs. We show this relation\nextends to include quantum codes\,
Lorentzian lattices\, and non-chiral\nCFTs. The relation to quantum codes
provides a simple way to solve\nmodular bootstrap constraints and identif
y interesting examples of\nconformal theories. In particular we construct
many examples of\nphysically distinct isospectral theories\, examples of "
would-be" CFT\npartition function -- non-holomorphic functions satisfying
all\nconstraints of the modular bootstrap\, yet not associated with any\nk
nown CFT\, and find theory with the maximal spectral gap among all\nNarain
CFTs with the central charge c=4. We also discuss averaging\nover the ens
emble of all CFTs associated with quantum codes\, and its\npossible hologr
aphic interpretation. The talk is based on\narXiv:2009.01236 and arXiv:200
9.01244.\n
LOCATION:Lecture held in online only
END:VEVENT
BEGIN:VEVENT
SUMMARY:Juan Maldacena (IAS)
DTSTART;VALUE=DATE-TIME:20200924T130000Z
DTEND;VALUE=DATE-TIME:20200924T140000Z
DTSTAMP;VALUE=DATE-TIME:20201031T052000Z
UID:RENC-THEO/7
DESCRIPTION:Title: Humanly traversable wormholes\nby Juan Maldacena (IAS)
as part of Rencontres Théoriciennes\n\n\nAbstract\nWe will review the con
struction of traversable wormhole solutions in four dimensions. The simple
st construction involves magnetic fields and charged massless fermions. Th
ese are ingredients found in the Standard Model at very short distances\,
giving us possible microscopic wormholes. One can have larger wormholes\,
such as the ones that would allow a person to travel\, by adding an extra
"dark sector" with suitable massless matter. One particular example involv
es the Randal Sundrum II model.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Roberto Emparan (U. Barcelona)
DTSTART;VALUE=DATE-TIME:20201008T090000Z
DTEND;VALUE=DATE-TIME:20201008T100000Z
DTSTAMP;VALUE=DATE-TIME:20201031T052000Z
UID:RENC-THEO/9
DESCRIPTION:Title: Quantum BTZ black hole\nby Roberto Emparan (U. Barcelon
a) as part of Rencontres Théoriciennes\n\n\nAbstract\nI will begin by rev
iewing the framework of braneworld holography as a means of studying quant
um effects on black holes including the gravitational backreaction of stro
ngly-coupled conformal fields. Then I will describe a holographic construc
tion of quantum rotating BTZ black holes (quBTZ) using an exact four-dimen
sional bulk solution. Besides yielding the quantum-corrected geometry and
the renormalized stress tensor of quBTZ\, we use it to show that the quant
um black hole entropy\, which includes the entanglement of the fields outs
ide the horizon\, rather non-trivially satisfies the first law of thermody
namics\, while the Bekenstein-Hawking-Wald entropy does not.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Céline Zwikel (TU Wien)
DTSTART;VALUE=DATE-TIME:20201001T090000Z
DTEND;VALUE=DATE-TIME:20201001T101500Z
DTSTAMP;VALUE=DATE-TIME:20201031T052000Z
UID:RENC-THEO/10
DESCRIPTION:Title: Symmetries at Null Boundaries\nby Céline Zwikel (TU Wi
en) as part of Rencontres Théoriciennes\n\nLecture held in Institut Henri
Poincaré\, Room 314 unless specified otherwise.\n\nAbstract\nI will pres
ent and motivate a program establishing\, in full generality\, the symmetr
ies and charge analysis for gravitational theories near a generic null hyp
ersurface without specifying any boundary condition. I will illustrate th
e first steps of this program on three dimensional Einstein gravity. In th
is case\, there are three charges which are generic functions over the cod
imension one null surface. The integrability of the charges and the charge
algebra depend on the state-dependence of symmetry generators which is a
priori not specified. I will establish the existence of infinitely many ch
oices that render the surface charges integrable. Then\, I will argue that
one expects this result to be valid for d > 3 when there is no Bondi news
by developing some aspects of the four dimensional case. Finally\, I will
put our results in the context of earlier constructions of near horizon s
ymmetries.\n
LOCATION:Lecture held in Institut Henri Poincaré\, Room 314 unless specif
ied otherwise
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ben Craps (Vrije Universiteit Brussel)
DTSTART;VALUE=DATE-TIME:20201022T090000Z
DTEND;VALUE=DATE-TIME:20201022T101500Z
DTSTAMP;VALUE=DATE-TIME:20201031T052000Z
UID:RENC-THEO/11
DESCRIPTION:Title: Slow scrambling in extremal BTZ and microstate geometri
es\nby Ben Craps (Vrije Universiteit Brussel) as part of Rencontres Théor
iciennes\n\n\nAbstract\nOut-of-time-order correlators (OTOCs) that capture
maximally chaotic properties of a black hole are determined by scattering
processes near the horizon. This prompts the question to what extent OTOC
s display chaotic behaviour in horizonless microstate geometries. This que
stion is complicated by the fact that Lyapunov growth of OTOCs requires no
nzero temperature\, whereas constructions of microstate geometries have be
en mostly restricted to extremal black holes. \n\n\nWe compute OTOCs for a
class of extremal black holes\, namely maximally rotating BTZ black holes
\, and show that on average they display "slow scrambling"\, characterized
by cubic (rather than exponential) growth. Superposed on this average pow
er-law growth is a sawtooth pattern\, whose steep parts correspond to brie
f periods of Lyapunov growth associated to the nonzero temperature of the
right-moving degrees of freedom in a dual conformal field theory. \n\n\nNe
xt we study the extent to which these OTOCs are modified in certain "super
strata"\, horizonless microstate geometries corresponding to these black h
oles. Rather than an infinite throat ending on a horizon\, these geometrie
s have a very deep but finite throat ending in a cap. We find that the sup
erstrata display the same slow scrambling as maximally rotating BTZ black
holes\, except that for large enough time intervals the growth of the OTOC
is cut off by effects related to the cap region\, some of which we evalua
te explicitly.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andreas Braun (Durham University)
DTSTART;VALUE=DATE-TIME:20201105T100000Z
DTEND;VALUE=DATE-TIME:20201105T111500Z
DTSTAMP;VALUE=DATE-TIME:20201031T052000Z
UID:RENC-THEO/12
DESCRIPTION:Title: Adiabatic Fibrations\, String Dualities and Exceptional
Holonomy\nby Andreas Braun (Durham University) as part of Rencontres Thé
oriciennes\n\nInteractive livestream: https://zoom.us/j/91529131783\nPassw
ord hint: 1234\nLecture held in Institut Henri Poincaré\, Room 314 unless
specified otherwise.\n\nAbstract\nNew instances of dualities between stri
ng compactifications can often be understood as a fibre-wise application o
f known dualities. After a review of classic results\, I will give an over
view of new instances of such dualities in the context of manifolds of exc
eptional holonomy - G2 and Spin(7) - as well as an introduction to the phy
sics related to such\ngeometries.\n
LOCATION:Lecture held in Institut Henri Poincaré\, Room 314 unless specif
ied otherwise
URL:https://zoom.us/j/91529131783
END:VEVENT
BEGIN:VEVENT
SUMMARY:Francesco Benini (SISSA)
DTSTART;VALUE=DATE-TIME:20201126T100000Z
DTEND;VALUE=DATE-TIME:20201126T111500Z
DTSTAMP;VALUE=DATE-TIME:20201031T052000Z
UID:RENC-THEO/13
DESCRIPTION:by Francesco Benini (SISSA) as part of Rencontres Théoricienn
es\n\nInteractive livestream: https://zoom.us/j/94637137722\nPassword hint
: 1234\nLecture held in Institut Henri Poincaré\, Room 314 unless specifi
ed otherwise.\nAbstract: TBA\n
LOCATION:Lecture held in Institut Henri Poincaré\, Room 314 unless specif
ied otherwise
URL:https://zoom.us/j/94637137722
END:VEVENT
BEGIN:VEVENT
SUMMARY:Pavel Kovtun (University of Victoria)
DTSTART;VALUE=DATE-TIME:20201029T150000Z
DTEND;VALUE=DATE-TIME:20201029T160000Z
DTSTAMP;VALUE=DATE-TIME:20201031T052000Z
UID:RENC-THEO/14
DESCRIPTION:by Pavel Kovtun (University of Victoria) as part of Rencontres
Théoriciennes\n\nLecture held in Institut Henri Poincaré\, Room 314 unl
ess specified otherwise.\nAbstract: TBA\n
LOCATION:Lecture held in Institut Henri Poincaré\, Room 314 unless specif
ied otherwise
END:VEVENT
BEGIN:VEVENT
SUMMARY:Massimo Taronna (Naples university)
DTSTART;VALUE=DATE-TIME:20201210T140000Z
DTEND;VALUE=DATE-TIME:20201210T150000Z
DTSTAMP;VALUE=DATE-TIME:20201031T052000Z
UID:RENC-THEO/15
DESCRIPTION:by Massimo Taronna (Naples university) as part of Rencontres T
héoriciennes\n\nLecture held in Institut Henri Poincaré\, Room 314 unles
s specified otherwise.\nAbstract: TBA\n
LOCATION:Lecture held in Institut Henri Poincaré\, Room 314 unless specif
ied otherwise
END:VEVENT
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