1207.5824 (Kristan Jensen et al.)

Thermodynamics, gravitational anomalies and cones    [PDF]

Kristan Jensen, R. Loganayagam, Amos Yarom

By studying the Euclidean partition function on a cone, we argue that pure and mixed gravitational anomalies generate a "Casimir momentum" which manifests itself as parity violating coefficients in the hydrodynamic stress tensor and charge current. The coefficients generated by these anomalies enter at a lower order in the hydrodynamic gradient expansion than would be naively expected. In 1+1 dimensions, the gravitational anomaly affects coefficients at zeroth order in the gradient expansion. The mixed anomaly in 3+1 dimensions controls the value of coefficients at first order in the gradient expansion.

View original: http://arxiv.org/abs/1207.5824