Time and temperature-dependent correlation function of an impurity in a one-dimensional Fermi gas as a Fredholm determinant
Quantum Gases
2016-06-21 v1
Abstract
We investigate a free one-dimensional spinless Fermi gas, and the Tonks-Girardeau gas interacting with a single impurity particle of equal mass. We obtain a Fredholm determinant representation for the time-dependent correlation function of the impurity particle. This representation is valid for an arbitrary temperature and an arbitrary repulsive or attractive impurity-gas -function interaction potential. It includes, as particular cases, the representations obtained for zero temperature and arbitrary repulsion in [Nucl. Phys. B 892, 83 (2015)], and for arbitrary temperature and infinite repulsion in [Nucl. Phys. B 520, 594 (1998)].
Keywords
Cite
@article{arxiv.1511.05922,
title = {Time and temperature-dependent correlation function of an impurity in a one-dimensional Fermi gas as a Fredholm determinant},
author = {O. Gamayun and Andrei G. Pronko and Mikhail B. Zvonarev},
journal= {arXiv preprint arXiv:1511.05922},
year = {2016}
}
Comments
33 pages, no figures