Speaker: Matthew Heydeman (哈佛大学)
Time: 2026-01-29 14:00-16:00
Location: 1410, SIMIS
Zoom Meeting ID: 845 4802 9157 Passcode: SIMIS
摘要：
The Bekenstein–Hawking formula gives a coarse-grained count of the number of microstates of a black hole, and it is remarkable that it may sometimes be reproduced from a microscopic count in string theory. However, the standard approach neglects quantum effects in the bulk which lead to pathologies for both supersymmetric and non-supersymmetric black holes, such as the breakdown of thermodynamics at sufficiently low temperatures.
In this talk, we will explain how a more careful treatment of the gravitational path integral resolves these tensions and leads to new and surprising effects that are completely invisible classically. We will focus on specific black holes in AdS4 vacuua of M-theory which are dual to 3d Class R theories. We find that dyonic black holes suffer a version of the Witten Effect, and ultimately neither the Bekenstein-Hawking formula nor the index account for the black hole entropy due to a mixed `t Hooft anomaly. Our results suggest instead that the CFT is described by nearly gapless exotic strange metal phase.
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