Holographic entanglement entropy and gravitational anomalies
Abstract
We study entanglement entropy in two-dimensional conformal field theories with a gravitational anomaly. In theories with gravity duals, this anomaly is holographically represented by a gravitational Chern-Simons term in the bulk action. We show that the anomaly broadens the Ryu-Takayanagi minimal worldline into a ribbon, and that the anomalous contribution to the CFT entanglement entropy is given by the twist in this ribbon. The entanglement functional may also be interpreted as the worldline action for a spinning particle -- that is, an anyon -- in three-dimensional curved spacetime. We demonstrate that the minimization of this action results in the Mathisson-Papapetrou-Dixon equations of motion for a spinning particle in three dimensions. We work out several simple examples and demonstrate agreement with CFT calculations.
Keywords
Cite
@article{arxiv.1405.2792,
title = {Holographic entanglement entropy and gravitational anomalies},
author = {Alejandra Castro and Stephane Detournay and Nabil Iqbal and Eric Perlmutter},
journal= {arXiv preprint arXiv:1405.2792},
year = {2015}
}
Comments
29 pages + Appendices, 4 figures