Density-curvature response and gravitational anomaly
Strongly Correlated Electrons
2015-02-16 v1 Mesoscale and Nanoscale Physics
High Energy Physics - Theory
Mathematical Physics
math.MP
Abstract
We study constraints imposed by the Galilean invariance on linear electromagnetic and elastic responses of two-dimensional gapped systems in background magnetic field. Exact relations between response functions following from the Ward identities are derived. In addition to viscosity-conductivity relations known in literature we find new relations between the density-curvature response and the chiral central charge.
Cite
@article{arxiv.1403.5809,
title = {Density-curvature response and gravitational anomaly},
author = {Andrey Gromov and Alexander G. Abanov},
journal= {arXiv preprint arXiv:1403.5809},
year = {2015}
}
Comments
5 pages