Physics

High Energy Theory Seminar

January 20, 2014 | 2:30pm - 4:00pm

I will present results on scaling regimes in entanglement growth during thermalization in holographic field theories. These scaling regimes are derived from the time evolution of entanglement entropy of spatial regions in a class of idealized...

High Energy Theory Seminar

December 02, 2013 | 2:30pm - 4:00pm

I define and study TQFTs which generalize the Dijkgraaf-Witten TQFT and can be described on a lattice using discrete 1-form and 2-form gauge fields. The gauge group is replaced by a gauge 2-group. It is proposed that 2-group TQFTs classify gapped...

High Energy Theory Seminar

November 25, 2013 | 2:30pm - 4:00pm

We present concrete solutions with accelerated expansion in string theory, requiring a small, tractable list of stress energy sources. We explain how this construction (and others in progress) evades previous no go theorems for simple accelerating...