What is inside a black hole?

Marika Taylor

School of Mathematical Sciences and STAG, University of Southampton, Higheld, Southampton, SO17 1BJ, UK.

Fri, Dec. 12th 2014, 14:15-15:15

Salle Claude Itzykson, Bât. 774, Orme des Merisiers

There has been renewed interest in the black hole information paradox following the claims by AMPS that unitary evolution is possible only if black holes have firewalls located just inside their event horizons. In this talk we will argue that holography implies an alternative, and rather more natural, resolution of the information loss paradox: significant modifications to the naive black hole geometry at sub-horizon scales. AdS/CFT calculations will be used to infer how the region ``inside'' a black hole should be described: we will use holography to explain why certain families of microstates of BPS black holes can be well-described by horizonless supergravity geometries (often called fuzzballs or microstate geometries in the literature) but we will also argue that generic black hole microstates cannot be captured within supergravity. In particular, we will show that known bubbling geometries describe so-called short string microstates of black holes and we will discuss how generic long string microstates might be described. Throughout the talk we will relate our calculations to the recent claims of Martinec and others.

Contact : rsavelli