Matthew Dodelson "Singularities of thermal correlators at strong coupling"

Tuesday 6 Oct 2020, 14:00 → 16:00 Europe/Zurich

Zoom Only (CERN)

 I will describe work in progress with Ooguri on the singularities of the two point function at finite temperature in a conformal field theory in more than two dimensions. At weak coupling the only singularity is on the light cone, but in the large N, large lambda regime a new singularity emerges. This new singularity corresponds to a null geodesic in the AdS/Schwarzschild black hole, which may wrap the photon sphere many times. After deriving this result, I will discuss the resolution of these singularities by stringy tidal effects at finite lambda. The basic tool I will use is to take the Penrose limit around a given null geodesic, and then use the solubility of the string theory in this background. I will also discuss applications to rotating black holes.

 

Zoom info:  https://cern.zoom.us/j/98069475178?pwd=MDNna0s5bE51ZlE1TUoxZENWTjdPQT09

Passcode: 355481