摘要

We investigate a massive gravity theory involving the SL(2; R) symmetry and anisotropy. Due to the SL(2; R) invariance of the equations of motion, the complex conductivity of this model transforms covariantly under the SL(2; R) transformation and the ratio of DC conductivities in different spatial directions is preserved even after the SL(2; R) transformation. We further investigate AC and Hall conductivities by utilizing the Kubo formula. There exists a Drude-like peak in the region with a small anisotropy, while such a Drude peak disappears when anisotropy becomes large. We also show that the complex conductivity can have a cyclotron frequency pole even beyond the hydrodynamic limit.

  • 出版日期2017-10-10