Informal Pizza Seminar

Time dependent AdS/CFT and null singularity

Chong-Sun Chu

Durham University

I will discuss a proposal of understanding a class of spacetime with null singularities in IIB string theory using the ADS/CFT correspondence. The IIB background typically has a varying dilaton and axion field, and these are mapped to time-dependent gauge coupling and theta angle in the gauge theory. We show that the supergravity metric can be reproduced from the kinetic part of the 1-loop Wilsonian action in SYM. We conjecture that higher loop quantum corrections provide a resolution of the spacetime singularity.