Hydrodynamics from quantum fields: a regularized expansion from the Wigner distribution
Nuclear Theory
2020-03-23 v1
Abstract
Second-order relativistic hydrodynamics is surprisingly predictive, even in the presence of large gradients. The hydrodynamic expansion from the method of moments does not require a gradient expansion, but it is intrinsically bound to the classic nature of relativistic kinetic theory. In this work a modified version of the method of moments is applied the Wigner distribution (the quantum precursor of the distribution function) to recover a systematically improvable hydrodynamic expansion, avoiding the divergences that would otherwise appear in the quantum case. The convergence of the regularized expansion is checked numerically in a far from equilibrium, distant from the kinetic limit case.
Cite
@article{arxiv.2003.09268,
title = {Hydrodynamics from quantum fields: a regularized expansion from the Wigner distribution},
author = {Leonardo Tinti},
journal= {arXiv preprint arXiv:2003.09268},
year = {2020}
}