Physics

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...

We show how a diffeomorphism invariance of the quantum Hall systems, together with topological consideration, put strong constraints on the physics that goes beyond the Chern-Simons action. We show how the Hall conductivity at finite wavenumbers is...

We investigate the cubic interactions of a massless higher-spin fermion with gravity in flat space and present covariant 2-s-s vertices, compatible with the gauge symmetries of the system, preserving parity. This explicit construction relies on the...

The axion is a well-motivated dark matter candidate, but is challenging to search for. We propose a new way to search for QCD axion and axion-like-particle (ALP) dark matter. Nuclei that are interacting with the background axion dark matter acquire...

General arguments indicate that Feynman integrals can be thought as period integrals. In this talk we will focus on the case of the two-loop sunset graph with internal masses. We will show that this integral is given by a period of a variation of a...