# Out of equilibrium chiral magnetic effect and momentum relaxation in holography

## TL;DR

This paper investigates the out-of-equilibrium behavior of the chiral magnetic effect using holography, revealing that it equilibrates more slowly than the background, with implications for quark-gluon plasma dynamics.

## Contribution

It introduces a holographic model with momentum relaxation to study the out-of-equilibrium chiral magnetic effect and analyzes its equilibration times.

## Key findings

- Chiral magnetic effect equilibrates slower than the background metric.
- Equilibration time depends on the quench duration and momentum relaxation.
- Results provide insights into heavy ion collision phenomena.

## Abstract

We compute anomalous transport phenomena sourced by vector and axial magnetic fields in out of equilibrium setups produced by Vaidya background metrics in holography. We use generalized Vaidya metrics that include momentum relaxation induced by massless scalar fields. While the background metric and gauge field show formally instantaneous thermalization the chiral magnetic effect has significantly large equilibration times. We study how the equilibration of the chiral magnetic effect depends on the length of the Vaidya quench and the momentum relaxation parameter. These results shed some light on aspects of the chiral magnetic effect in out of equilibrium situations as the quark gluon plasma produced in heavy ion collisions.