Time: 09:30am (UTC/GMT+08:00, Beijing/Shanghai), Apr. 29 (Wedn.), 2020

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Meeting ID: 658 6205 9337

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Speaker: Peng-Fei Zhang (Caltech)

Abstract:

As one of the most important issues in the gravity, information paradox has attracted much attention. Recently, the paradox is resolved by identifying a new possible Ryu-Takayanagi surface, which leads to a first-order transition in entropy dynamics. In this talk, we report analogy behaviors for entanglement entropy in the SYK model. We consider two different set-ups: the SYK model coupled to Majorana chain bath or the single SYK pure states. We find different saddle-points when computing the Renyi entropy, which leads to a first-order transition as in gravity. We further discuss the origin of the long-time saddle points and its relation to the entanglement wedge reconstruction.

[1]. Yiming Chen, Xiao-Liang Qi and PZ, 2003.13147
[2]. PZ, 2004.05339