A panoply of Schwinger-Keldysh transport
High Energy Physics - Theory
2018-11-28 v3 Statistical Mechanics
Abstract
We classify all possible allowed constitutive relations of relativistic fluids in a statistical mechanical limit using the Schwinger-Keldysh effective action for hydrodynamics. We find that microscopic unitarity enforces genuinely new constraints on the allowed transport coefficients that are invisible in the classical hydrodynamic description; they are not implied by the second law or the Onsager relations. We term these conditions Schwinger-Keldysh positivity and provide explicit examples of the various allowed terms.
Keywords
Cite
@article{arxiv.1804.04654,
title = {A panoply of Schwinger-Keldysh transport},
author = {Kristan Jensen and Raja Marjieh and Natalia Pinzani-Fokeeva and Amos Yarom},
journal= {arXiv preprint arXiv:1804.04654},
year = {2018}
}
Comments
96 pages; v2. Corrected an error regarding CPT transformation properties of dissipative transport and added references; v3. Minor fixes