A new approach to bulk viscosity in strange quark matter at high densities

TL;DR

This paper introduces a novel method for calculating bulk viscosity in high-density strange quark matter, ensuring positivity and simplifying analysis for multi-component fluids with light and massive quarks.

Contribution

The paper presents a new approach to compute bulk viscosity in strange quark matter, guaranteeing positive definiteness and ease of application for complex multi-component systems.

Findings

Bulk viscosity is proven to be positive definite using the new method.

The approach simplifies calculations for multi-component fluids with different quark masses.

The method enhances understanding of dissipative processes in dense quark matter.

Abstract

A new method is proposed to compute the bulk viscosity in strange quark matter at high densities. Using the method it is straightforward to prove that the bulk viscosity is positive definite, which is not so easy to accomplish in other approaches especially for multi-component fluids like strange quark matter with light up and down quarks and massive strange quarks.