Time:  9:50am  (UTC/GMT+8:00, Beijing/Shanghai), Oct. 9 (Sat.) , 2021

Zoom URL: https://us06web.zoom.us/j/86027044302?pwd=NzRKVFVzZ0VlV0tMUnhKWDZNOEdKZz09

Meeting ID: 860 2704 4302

Password: 123789

Speaker:  Yiming Chen (Princeton)

Abstract:

It has long been speculated that a black hole in string theory turns into highly excited strings close to the Hagedorn temperature. Gravitational attraction pulls different parts of the string together, forming a star-like configuration. In this talk, I will review the properties of a concrete solution of this kind, first discovered by Horowitz and Polchinski. I will discuss whether the Horowitz-Polchinski solution can be smoothly connected with the black hole as worldsheet CFTs. I will also discuss how the story can be generalized to charged cases, as well as its implication on the near extremal limit.

[Free discussion in the afternoon]