Chiral vortical effect from the compactified D4-branes with smeared D0-brane charge

TL;DR

This paper investigates the chiral vortical effect in a strongly coupled nonconformal fluid derived from compactified D4-branes with smeared D0-brane charge, revealing how it depends on chemical potential and affects fluid stability.

Contribution

It introduces a holographic model for the chiral vortical effect in nonconformal fluids with smeared D0-brane charge, analyzing its dependence on chemical potential and stability.

Findings

Chiral vortical effect coefficient depends on chemical potential regardless of conformality.

The anomalous relativistic fluid remains stable under the studied conditions.

Smeared D0-brane charge doping reduces the sound speed.

Abstract

By using the boundary derivative expansion formalism of fluid/gravity correspondence, we study the chiral vortical effect from the compactified D4-branes with smeared D0-brane charge. This background corresponds to a strongly coupled, nonconformal relativistic fluid with a conserved vector current. The presence of the chiral vortical effect is induced by the addition of a Chern-Simons term in the bulk action. Except that the non-dissipative anomalous viscous coefficient and the sound speed rely only on the chemical potential, most of the other thermal and hydrodynamical quantities of the first order depend both on the temperature and the chemical potential. According to our result, the way that the chiral vortical effect coefficient depends on the chemical potential seems irrelevant with whether the relativistic fluid is conformal or not. Stability analysis shows that this anomalous relativistic fluid is stable and the doping of the smeared D0-brane charge will slow down the sound speed.