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15/01/2023, 19:30
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Luca Delacrétaz (UNIGE)16/01/2023, 09:00
Nonintegrable QFTs are expected to thermalize and exhibit emergence of hydrodynamics and chaos. In weakly coupled QFTs, kinetic theory captures local thermalization; such a versatile tool is absent away from the perturbative regime. I will present analytical and numerical results using nonperturbative methods to study thermalization at strong coupling. I will show how requiring causality in...
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Matthew Thomas Walters (Universite de Geneve (CH))16/01/2023, 10:15
I will present a nonperturbative recipe for directly computing the S-matrix in strongly-coupled QFTs. The method makes use of spectral data obtained in a Hamiltonian framework and can be applied to a wide range of theories, including potentially QCD. After discussing the general approach, I will demonstrate its application to the specific example of the 2+1d O(N) model at large N, using energy...
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Jan de Boer (University of Amsterdam)16/01/2023, 16:45
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Netta Engelhardt (MIT)16/01/2023, 18:00
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Monica Guica (Paris Saclay)17/01/2023, 09:00
I will discuss the classical and quantum symmetries of TTbar-deformed CFTs. These symmetries are infinite in number and, in a certain basis, organise into a Virasoro x Virasoro algebra with the same central charge as that of the undeformed CFT. I will present a quantum, abstract proof of the existence of these symmetries and three different - and fully explicit - classical perspectives:...
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Alexandre Belin17/01/2023, 10:15
Locality is a powerful property of quantum field theory and implies that information can be strictly localized in regions of space, and is completely inaccessible from far away. On the other hand, the holographic nature of quantum gravity suggests that the theory is ultimately non-local and that information can never be localized deep inside some spacetime region, but rather is always...
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Hong Liu (MIT)17/01/2023, 16:45
n holographic duality, a higher dimensional quantum gravity system emerges from a lower dimensional conformal field theory (CFT) with a large number of degrees of freedom. We propose a formulation of duality for a general causally complete bulk spacetime region, called subalgebra-subregion duality, which provides a framework to describe how geometric notions in the gravity system, such as...
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Manus Visser (DAMTP Cambridge)17/01/2023, 18:00
We consider the quantum gravity partition function that counts the dimension of the Hilbert space of a spatial region with topology of a ball and fixed proper volume, and evaluate it in the leading order saddle point approximation. The result is the exponential of the Bekenstein-Hawking entropy associated with the area of the saddle ball boundary. This generalizes the classic Gibbons- Hawking...
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Robin Karlsson (CERN)18/01/2023, 09:00
The emergence of dynamical spacetime in the bulk in AdS/CFT, from metric fluctuations to black hole solutions, is an interesting challenge for the conformal bootstrap program. How are properties of the horizon and the singularity encoded in the CFT data? A set of minimal observables which plays an important role in this context are stress tensor correlators at finite temperature. I will...
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Herman Verlinde (Princeton University)18/01/2023, 10:15
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Lampros Lamprou (UBC)18/01/2023, 16:45
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Jerome Gauntlett (Imperial College)18/01/2023, 18:00
We consider supersymmetric $AdS_3\times Y_7$ solutions of type IIB and
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$AdS_2\times Y_9$ solutions of $D=11$ supergravity. These can arise as the
near horizon limit of black strings in $AdS_5$ and and black holes in $AdS_4$ spacetimes, respectively.
We explain how novel extremisation techniques enable one to compute physical observables
without explicitly solving Einstein equations. This... -
Marco Meineri (Universite de Geneve (CH))19/01/2023, 16:45
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Joshua Kames-King (EPFL)19/01/2023, 18:00
I will describe work in progress w/ B.Knighton, A.Kanargias,M. Usatyuk on finding a stringy embedding of ensemble-averaging. Specifically we consider the recent duality between Narain T^c CFTs averaged over moduli space and exotic AdS_3 U(1)^c x U(1)^c gravity. We generalise this by performing the average over the symmetric product orbifold of T^c where the bulk dual now must include a...
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Andrea Puhm (Polytechnique)20/01/2023, 09:00
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Piotr Tourkine (CNRS, LAPTh, Annecy)20/01/2023, 10:15
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Rishi Mouland (DAMTP, University of Cambridge)20/01/2023, 11:30
I will motivate and study a holographic duality between on one hand a theory of superconformal quantum mechanics, and on the other, M-theory on a particular background. I will exhibit a broad class of black hole solutions, whose entropy must be captured by a degeneracy of states in the quantum mechanics. Through an asymptotic study of the superconformal index in the supergravity regime, I will...
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Lampros Lamprou (UBC)
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Jerome Gauntlett (Imperial College)
We consider supersymmetric $AdS_3\times Y_7$ solutions of type IIB and
Go to contribution page
$AdS_2\times Y_9$ solutions of $D=11$ supergravity. These can arise as the
near horizon limit of black strings in $AdS_5$ and and black holes in $AdS_4$ spacetimes, respectively.
We explain how novel extremisation techniques enable one to compute physical observables
without explicitly solving Einstein equations. This... -
Marco Meineri (Universite de Geneve (CH))
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