Kinetics calculation on the shear viscosity in hot QED at finite density

TL;DR

This paper calculates the shear viscosity of hot QED plasma at finite temperature and density using the Boltzmann equation, revealing that chemical potential increases viscosity through a quadratic term.

Contribution

It introduces a variational approach to compute shear viscosity in hot QED at finite density, highlighting the effect of chemical potential.

Findings

Chemical potential enhances shear viscosity in leading-log order.

Quadratic dependence of viscosity on chemical potential.

Method provides a way to include finite density effects in plasma viscosity.

Abstract

The shear viscosity of QED plasma at finite temperature and density is calculated by solving Boltzmann equation with variational approach. The result shows the small chemical potential enhances the viscosity in leading-log order by adding a chemical potential quadratic term to the viscosity for the pure temperature environment.