Abstract:

I will introduce a recently found property called fortuity for supersymmetric black holes.Fortuity distinguishes microstates of black holesfromthose of horizonless geometries, by relating BPS states in the dual theories with different numbers of degrees of freedom. I will explore fortuity in the supersymmetric N=2 SYK models. and show that it is related to the genericity of the supercharge and leads to a concentration of BPS states at a certain R-charge.Iwill then apply the R-charge concentration to the N-4SYM and give a microscopic derivation of the non-linear charge relation of the BPS black holes in AdS5. Finally,1will consider the two-favored SyK model and discuss the relation between fortuity and chaos.

报告人简介：

张其明，清华大学丘成桐数学科学中心助理教授。张其明教授于2014年获得哈佛大学物理学博士学位，2014年到2019年先后在加州大学伯克利分校和戴维斯分校从事博士后研究工作，现任清华大学数学科学中心助理教授研究方向为弦理论、量子场论和量子引力。