Hydrodynamics as sound-speed approaches light-speed
High Energy Physics - Phenomenology
2024-04-04 v2
Abstract
I present the simplest 3+1 dimensional quantum field theory for which the speed of sound can be arbitrarily close to the speed of light. Examining the hydrodynamics, I find cases where the shear viscosity is finite, but the "shear relaxation coefficient" appears always to be divergently large.
Keywords
Cite
@article{arxiv.2404.01968,
title = {Hydrodynamics as sound-speed approaches light-speed},
author = {Guy D. Moore},
journal= {arXiv preprint arXiv:2404.01968},
year = {2024}
}
Comments
10 pages including figures. Added acknowledgments, corrected minor typos