Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines hep-th
Date Mercredi 14 Fevrier 2018
Heure 14:00
Institut IPHT
Salle Salle Claude Itzykson, Bât. 774
Nom de l'orateur Andrea Puhm
Prenom de l'orateur
Addresse email de l'orateur
Institution de l'orateur École Polytechnique
Titre On relative entropy and distinguishability of black hole microstates
Résumé Relative entropy is among the most powerful tools available for characterizing the distinguishability of two quantum states, and has recently found broad application in holography. A challenging question in the context of the information paradox is how to distinguish black hole microstates without access to the entire spacetime. Inspired by the recent work of Bao and Ooguri (BO), we study the distinguishability of black hole microstates from the thermal state as captured by the average of their relative entropies known as Holevo information. Under the assumption that the vacuum conformal block dominates the entropy calculation, BO find that the average relative entropy vanishes on spatial regions smaller than half the size of the CFT. However, vacuum block dominance fails for some microstates of the M = 0 BTZ black hole. We show that this renders the average relative entropy nonzero even on infinitesimal intervals at leading order in the central charge.
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