Physics

Motivated by the connection between 4-manifolds and 2d N=(0,2) theories, we study the dynamics of a fairly large class of 2d N=(0,2) gauge theories. We see that physics of such theories is very rich, much as the physics of 4d N=1 theories. We...

I will review the low energy excitations and other observables in the strongly interacting finite density states described by holography.

References:
http://arxiv.org/abs/arXiv:1310.6334
and references therein.

We propose a general formula for calculating the entanglement entropy in theories dual to higher derivative gravity where the Lagrangian is a contraction of Riemann tensors. Our formula consists of Wald's formula for the black hole entropy, as well...

We use the "lens space index", i.e., the partition function on S^3/Z_r x S^1, to study certain properties of four dimensional gauge theories related to the global structure of the gauge group. We show that the lens space index, unlike the ordinary...