Holographic approach to anomalous transport in a massive $U(1)$ gauge theory

TL;DR

This paper investigates a holographic model with a massive U(1) gauge field, analyzing anomalous transport phenomena like chiral vortical and magnetic conductivities, revealing new contributions due to gauge mass and mixed terms.

Contribution

It introduces a massive gauge holographic model with full backreaction, uncovering novel contributions to anomalous conductivities from mixed gauge-gravitational terms.

Findings

Chiral vortical conductivity, σ_V, is computed.

Energy current conductivities, σ_B^ε and σ_V^ε, are equal.

A new contribution to σ_V from mixed gauge-gravitational terms is identified.

Abstract

In this study, we explore a massive (U(1)) gauge holographic model with pure gauge and mixed gauge-gravitational Chern-Simons terms. By considering the full backreaction of the gauge field on the metric tensor, we explore the vortical and energy transport sectors. Our findings for the chiral vortical conductivity, $\sigma_V$, and the chiral magnetic/vortical conductivity of energy current show that $\sigma^\varepsilon_B = \sigma^\varepsilon_V$. Notably, we highlight a contribution to (\sigma_V) induced by the mixed term in the massive theory, which is absent in the massless case.