Stress-stress correlator in lambda phi^4 theory: Poles or a Cut?
High Energy Physics - Phenomenology
2018-06-13 v2
Abstract
We explore the analytical properties of the traceless stress tensor 2-point function at zero momentum and small frequency (relevant for shear viscosity and hydrodynamic response) in hot, weakly coupled lambda phi^4 theory. We show that, rather than one or a small number of poles, the correlator has a cut along the negative imaginary frequency axis. We briefly discuss this result's relevance for constructing 2'nd order hydrodynamic models of hot relativistic field theories.
Cite
@article{arxiv.1803.00736,
title = {Stress-stress correlator in lambda phi^4 theory: Poles or a Cut?},
author = {Guy D. Moore},
journal= {arXiv preprint arXiv:1803.00736},
year = {2018}
}
Comments
17 pages, 5 figures, published version (minor revision)