Speaker
Dr
Martin O'Loughlin
(University of Nova Gorica)
Description
We study in detail the solution space for a class of sypersymmetric solutions to supergravity. The solutions fall into three classes, non-singular, null-singular and time machines with a time-like naked singularity. We study the general features of these metrics and prove that there are actually just two generic classes of space-times - those with null singularities are in the same class as the non-singular metrics. Holography seems to provide a dual description only for the first of these two types of space-time in terms of a unitary CFT indicating the possible existence of a chronology protection mechanism for this class of geometries.
