Theory of diffusive fluctuations
High Energy Physics - Theory
2019-12-24 v3 Statistical Mechanics
Strongly Correlated Electrons
Abstract
The recently developed effective field theory of fluctuations around thermal equilibrium is used to compute late-time correlation functions of conserved densities. Specializing to systems with a single conservation law, we find that the diffusive pole is shifted in the presence of non-linear hydrodynamic self-interactions, and that the density-density Green's function acquires a branch point half way to the diffusive pole, at frequency . We discuss the relevance of diffusive fluctuations for strongly correlated transport in condensed matter and cold atomic systems.
Cite
@article{arxiv.1811.12540,
title = {Theory of diffusive fluctuations},
author = {Xinyi Chen-Lin and Luca V. Delacrétaz and Sean A. Hartnoll},
journal= {arXiv preprint arXiv:1811.12540},
year = {2019}
}
Comments
8+15 pages, 5 figures; v2: small correction to figure 2; v3: published version