Causality and classical dispersion relations
High Energy Physics - Theory
2024-02-29 v3 High Energy Physics - Phenomenology
Nuclear Theory
Abstract
We explore the consequences of relativistic causality and covariant stability for short-wavelength dispersion relations in classical systems. For excitations described by a finite number of partial differential equations, as is the case in relativistic hydrodynamics, we give causality and covariant stability constraints on the excitation's frequency at large momenta.
Cite
@article{arxiv.2309.11703,
title = {Causality and classical dispersion relations},
author = {Raphael E. Hoult and Pavel Kovtun},
journal= {arXiv preprint arXiv:2309.11703},
year = {2024}
}
Comments
16 pages, 1 figure. v2: reference added, small clarifications. v3: reference added, published version