Holography and String Dynamics in Time-dependent Backgrounds

TL;DR

The metric and fluxes that determine the dual holographic closed string theory are found, providing a concrete example of holography in a cosmological setting.

Abstract

We study the dynamics of D-branes in a smooth time-dependent background. The theory on the branes is a time-dependent non-commutative field theory. We find the metric and fluxes that determine the dual holographic closed string theory. This provides a concrete example of holography in a cosmological setting.