A random phase approximation study of one-dimensional fermions after a quantum quench
Strongly Correlated Electrons
2015-05-28 v2
Abstract
The effect of interactions on a system of fermions that are in a non-equilibrium steady state due to a quantum quench is studied employing the random-phase-approximation (RPA). As a result of the quench, the distribution function of the fermions is highly broadened. This gives rise to an enhanced particle-hole spectrum and over-damped collective modes for attractive interactions between fermions. On the other hand, for repulsive interactions, an undamped mode above the particle-hole continuum survives. The sensitivity of the result on the nature of the non-equilibrium steady state is explored by also considering a quench that produces a current carrying steady-state.
Keywords
Cite
@article{arxiv.1105.6039,
title = {A random phase approximation study of one-dimensional fermions after a quantum quench},
author = {Jarrett Lancaster and Thierry Giamarchi and Aditi Mitra},
journal= {arXiv preprint arXiv:1105.6039},
year = {2015}
}
Comments
11 pages, 3 figures, published version