Work

Relativistic dissipative fluids in the trace-fixed particle frame: Hyperbolicity, causality, and stability

Year: 2025

Type: article

Abstract: We propose a first-order theory of relativistic dissipative fluids in the trace-fixed particle frame, which is similar to Eckart's frame except that the temperature is determined by fixing the trace of the stress-energy tensor. Our theory is hyperbolic and causal provided a single inequality holds. For low wave numbers, the expected damped modes in the shear, acoustic, and heat diffusion channels are recovered. Stability of global equilibria with respect to all wave numbers is also analyzed. The conditions for hyperbolicity, causality, and stability are satisfied for a simple gas of hard spheres or disks.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.111.l081501

Authors: J. Félix Salazar, Ana Laura García-Perciante, Olivier Sarbach

Institutions: Universidad Autónoma Metropolitana, Universidad Michoacana de San Nicolás de Hidalgo

Language: English

Topic: High-Energy Particle Collisions Research

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Consejo Nacional de Ciencia y Tecnología, Universidad Michoacana de San Nicolás de Hidalgo, Coordinación de la Investigación Científica

Awards: G2001344522, G4282746896