Transport coefficients of the second order hydrodynamics and the applicability of hydrodynamic model

TL;DR

This paper derives microscopic formulas for second order hydrodynamic transport coefficients using a nonequilibrium density operator framework, enhancing the theoretical understanding of hydrodynamic models.

Contribution

It introduces a novel derivation of second order transport coefficients from a microscopic perspective based on the Nakajima-Zubarev formalism.

Findings

Provides explicit formulas for second order transport coefficients.

Clarifies the applicability limits of hydrodynamic models.

Enhances theoretical foundation of hydrodynamics.

Abstract

Based on the Nakajima-Zubarev type nonequilibrium density operator, we derive microscopic formulae of the transport coefficients in the second order hydrodynamics.