Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines hep-th
Date Jeudi 25 Mars 2021
Heure 11:00
Institut IHP
Salle Zoom: (pwd= 1234 )
Nom de l'orateur Goutéraux
Prenom de l'orateur Blaise
Addresse email de l'orateur blaise [dot] gouteraux [at] polytechnique [dot] edu
Institution de l'orateur Ecole Polytechnique
Titre Hydrodynamic diffusion and its breakdown near AdS2 fixed points
Résumé Hydrodynamics provides a universal description of interacting quantum field theories at sufficiently long times and wavelengths, but breaks down at scales dependent on microscopic details of the theory. We use gauge-gravity duality to investigate the breakdown of diffusive hydrodynamics in two low temperature states dual to black holes with AdS$_2$ horizons. We find that the breakdown is characterized by a collision between the diffusive pole of the retarded Green's function with a pole associated to the AdS$_2$ region of the geometry, such that the local equilibration time is set by infra-red properties of the theory. The absolute values of the frequency and wavevector at the collision ($\omega_{eq}$ and $k_{eq}$) provide a natural characterization of all the low temperature diffusivities $D$ of the states via $D=\omega_{eq}/k_{eq}^2$ where $\omega_{eq}=2\pi\Delta T$ is set by the temperature $T$ and the scaling dimension $\Delta$ of an infra-red operator. We confirm that these relations are also satisfied in an SYK chain model in the limit of strong interactions.
Numéro de preprint arXiv 2011.12301
Fichiers attachés
  • IHP-2021-GOUTERAUX.pdf (1206227 bytes) OPEN

Pour obtenir l' affiche de ce séminaire : [ Postscript | PDF ]

[ Annonces ]    [ Abonnements ]    [ Archive ]    [ Aide ]    [ ]
[ English version ]