Shear Viscosity in Weakly Coupled N-Component Scalar Field Theories
High Energy Physics - Phenomenology
2011-06-24 v2 High Energy Physics - Lattice
Nuclear Experiment
Nuclear Theory
Abstract
The rich phenomena of the shear viscosity (eta) to entropy density (s) ratio, eta/s, in weakly coupled N-component scalar field theories are studied. eta/s can have a "double dip" behavior due to resonances and the phase transition. If an explicit goldstone mass term is added, then eta/s can either decrease monotonically in temperature or, as seen in many other systems, reach a minimum at the phase transition. We also show how to go beyond the original variational approach to make the Boltzmann equation computation of eta systematic.
Cite
@article{arxiv.1010.3121,
title = {Shear Viscosity in Weakly Coupled N-Component Scalar Field Theories},
author = {Jiunn-Wei Chen and Mei Huang and Chang-Tse Hsieh and Han-Hsin Lin},
journal= {arXiv preprint arXiv:1010.3121},
year = {2011}
}
Comments
22 pages, 2 figures