BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:The TTbar deformation in AdS/CFT
DTSTART;VALUE=DATE-TIME:20191115T140000Z
DTEND;VALUE=DATE-TIME:20191115T160000Z
DTSTAMP;VALUE=DATE-TIME:20191212T043100Z
UID:indico-event-863561@indico.cern.ch
DESCRIPTION:Speakers: Ruben Monten (IPhT\, Saclay)\n\nA large class of two
-dimensional quantum fields theories contain an interesting operator built
from the stress tensor\, called "TTbar". Although this operator is irrele
vant\, adding it to the action generates a new family of theories in a con
trolled way. For conformal field theories with an Anti-de Sitter holograph
ic dual\, it has been conjectured that the TTbar deformation corresponds t
o "cutting off" the region of AdS beyond a hypersurface of fixed radius. W
e use the variational principle in the CFT to derive the holographic effec
t of the TTbar deformation at large N: it changes the boundary conditions
of the metric at infinity. In the absence of matter and for a particular s
ign of the deformation parameter\, this can be reinterpreted as Dirichlet
conditions at finite radius\; albeit without discarding the region outside
. This interpretation breaks down when matter is present\, whereas the mix
ed boundary conditions prevail. The asymptotic symmetries of the gravitati
onal theory with mixed boundary conditions form two Virasoro algebras\, th
e generators of which are state-dependent but the central charge remains u
nchanged.\n\nhttps://indico.cern.ch/event/863561/
LOCATION:4/3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/863561/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Josh Kirklin: "Holographic Uhlmann Holonomy and the Entanglement W
edge Symplectic Form" (virtual seminar)
DTSTART;VALUE=DATE-TIME:20191119T130000Z
DTEND;VALUE=DATE-TIME:20191119T150000Z
DTSTAMP;VALUE=DATE-TIME:20191212T043100Z
UID:indico-event-859794@indico.cern.ch
DESCRIPTION:Abstract: \n\nSubregion duality is an idea in holography which
states that every subregion of the boundary theory has a corresponding su
bregion in the bulk theory\, called the 'entanglement wedge'\, to which it
is dual. In the classical limit of the gravity theory\, we expect the fie
lds in the entanglement wedge to permit a Hamiltonian description involvin
g a phase space and Poisson brackets. In this talk\, I will describe how t
his phase space arises from the point of view of the boundary theory. In p
articular\, I will explain how it emerges from measurements of a certain q
uantum information-theoretic quantity known as the 'Uhlmann phase'\, in th
e boundary subregion.\nhttps://indico.cern.ch/event/859794/
LOCATION:4/3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/859794/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Virtual Seminar - "Classifying\, Counting and Constraining Gravita
tional S matrices"
DTSTART;VALUE=DATE-TIME:20191121T103000Z
DTEND;VALUE=DATE-TIME:20191121T123000Z
DTSTAMP;VALUE=DATE-TIME:20191212T043100Z
UID:indico-event-863171@indico.cern.ch
DESCRIPTION:Speakers: Shiraz Minwalla (TIFR)\nAbstract: We study the spac
e of all kinematically allowed four photon and four graviton S-matrices\,
polynomial in scattering momenta. We demonstrate that this space is the pe
rmutation invariant sector of a module over the ring of polynomials of the
Mandelstam invariants s\, t and u. We construct these modules for every v
alue of the spacetime dimension D\, and so explicitly count and parameteri
ze the most general four photon and four graviton S-matrix at any given de
rivative order. We also explicitly list the local Lagrangians that give ri
se to these S-matrices. We then conjecture that the Regge growth of S-matr
ices in all physically acceptable classical theories is bounded by s 2 at
fixed t. A four parameter subset of the polynomial photon S-matrices const
ructed above satisfies this Regge criterion. For gravitons\, on the other
hand\, no polynomial addition to the Einstein S-matrix obeys this bound fo
r D ≤ 6. For D ≥ 7 there is a single six derivative polynomial Lagrang
ian consistent with our conjectured Regge growth bound. Our conjecture thu
s implies that the Einstein four graviton S-matrix does not admit any phys
ically acceptable polynomial modifications for D ≤ 6. We also argue th
at every finite sum of pole exchange contributions to four graviton scatte
ring also such violates our conjectured Regge growth bound\, at least when
D ≤ 6\, even when the exchanged particles have low spin\nhttps://indico
.cern.ch/event/863171/
LOCATION:4/3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/863171/
END:VEVENT
BEGIN:VEVENT
SUMMARY:N=2 Superconformal field theories from mixed branches and VOAs
DTSTART;VALUE=DATE-TIME:20191203T130000Z
DTEND;VALUE=DATE-TIME:20191203T140000Z
DTSTAMP;VALUE=DATE-TIME:20191212T043100Z
UID:indico-event-852362@indico.cern.ch
DESCRIPTION:Speakers: Mario Martone (UT Austin)\nAbstract: I will first pr
esent an overview of Superconformal Field Theories (SCFTs) focusing partic
ularly on the analysis of the moduli space of vacua of N=2 SCFTs in 4 dime
nsions. After reviewing the relation of such theories coming with 2d non-u
nitary conformal theories and the algebraic constraints which follow\, I w
ill outline a possible classification scheme. This is mostly based on a r
ecently discovered new structure underlying N=2 SCFTs which ties together
the corresponding VOA with specific information of the moduli space of vac
ua\, namely the mixed branch geometry and the number of symplectic leav
es of the Higgs branch. This in turn might enable a systematic constructi
on of all N=2 SCFTs with a minimal set of inputs.\nhttps://indico.cern.ch/
event/852362/
LOCATION:4/3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/852362/
END:VEVENT
BEGIN:VEVENT
SUMMARY:High-Energy Bootstrap and Tauberian Theory
DTSTART;VALUE=DATE-TIME:20191210T130000Z
DTEND;VALUE=DATE-TIME:20191210T150000Z
DTSTAMP;VALUE=DATE-TIME:20191212T043100Z
UID:indico-event-867698@indico.cern.ch
DESCRIPTION:Speakers: Baur Mukhametzhanov\nhttps://indico.cern.ch/event/86
7698/
LOCATION:4/3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/867698/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Talk by Barak Gabai
DTSTART;VALUE=DATE-TIME:20191217T130000Z
DTEND;VALUE=DATE-TIME:20191217T150000Z
DTSTAMP;VALUE=DATE-TIME:20191212T043100Z
UID:indico-event-857800@indico.cern.ch
DESCRIPTION:Speakers: Barak Gabai (Harvard University)\nhttps://indico.cer
n.ch/event/857800/
LOCATION:4/2-037 - TH meeting room (CERN)
URL:https://indico.cern.ch/event/857800/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Eugene Skvortsov\, TBA
DTSTART;VALUE=DATE-TIME:20200128T130000Z
DTEND;VALUE=DATE-TIME:20200128T150000Z
DTSTAMP;VALUE=DATE-TIME:20191212T043100Z
UID:indico-event-865888@indico.cern.ch
DESCRIPTION:https://indico.cern.ch/event/865888/
LOCATION:4/3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/865888/
END:VEVENT
BEGIN:VEVENT
SUMMARY:TBA
DTSTART;VALUE=DATE-TIME:20200225T130000Z
DTEND;VALUE=DATE-TIME:20200225T150000Z
DTSTAMP;VALUE=DATE-TIME:20191212T043100Z
UID:indico-event-861092@indico.cern.ch
DESCRIPTION:Speakers: Manuela Kulaxizi\nhttps://indico.cern.ch/event/86109
2/
LOCATION:4/3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/861092/
END:VEVENT
END:VCALENDAR