タイトル：
Black hole microstates and superstrata

アブストラクト：
Microscopic physics of black holes is full of unsolved problems and, in
particular, understanding their microstates is an important issue.  In
this talk, I will first review the microstate geometry program to
explicitly construct black-hole microstates in the framework of
classical supergravity as smooth horizonless geometries.  Then I will
introduce "superstrata", the most general microstate geometries ever
known and discuss their relevance to black-hole microstates.