Microscopic Origin of the Shear Relaxation Time in Causal Dissipative Fluid Dynamics
High Energy Physics - Theory
2017-08-23 v1 High Energy Physics - Phenomenology
Nuclear Theory
Abstract
In this paper we show how to compute the shear relaxation time from an underlying microscopic theory. We prove that the shear relaxation time in Israel-Stewart-type theories is given by the inverse of the pole of the corresponding retarded Green's function, which is nearest to the origin in the complex energy plane. Consequently, the relaxation time in such theories is a microscopic, and not a macroscopic, i.e., fluid-dynamical time scale.
Keywords
Cite
@article{arxiv.1103.2476,
title = {Microscopic Origin of the Shear Relaxation Time in Causal Dissipative Fluid Dynamics},
author = {G. S. Denicol and H. Niemi and J. Noronha and D. H. Rischke},
journal= {arXiv preprint arXiv:1103.2476},
year = {2017}
}
Comments
10 pages, to appear in the proceedings of Advances in Nuclear Physics in Our Time (2010)