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Title: Viscosity of a multichannel one-dimensional Fermi gas

Abstract

Many one-dimensional systems of experimental interest possess multiple bands arising from shallow confining potentials. In this paper, we study a gas of weakly interacting fermions and show that the bulk viscosity is dramatically altered by the occupation of more than one band. The reasons for this are twofold: a multichannel system is more easily displaced from equilibrium and the associated relaxation processes lead to more rapid equilibration than in the single channel case. We estimate the bulk viscosity in terms of the underlying microscopic interactions. The experimental relevance of this physics is discussed in the context of quantum wires and trapped cold atomic gases.

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division
OSTI Identifier:
1425213
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review B; Journal Volume: 97; Journal Issue: 4
Country of Publication:
United States
Language:
English

Citation Formats

DeGottardi, Wade, and Matveev, K. A. Viscosity of a multichannel one-dimensional Fermi gas. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.97.045135.
DeGottardi, Wade, & Matveev, K. A. Viscosity of a multichannel one-dimensional Fermi gas. United States. doi:10.1103/PhysRevB.97.045135.
DeGottardi, Wade, and Matveev, K. A. Mon . "Viscosity of a multichannel one-dimensional Fermi gas". United States. doi:10.1103/PhysRevB.97.045135.
@article{osti_1425213,
title = {Viscosity of a multichannel one-dimensional Fermi gas},
author = {DeGottardi, Wade and Matveev, K. A.},
abstractNote = {Many one-dimensional systems of experimental interest possess multiple bands arising from shallow confining potentials. In this paper, we study a gas of weakly interacting fermions and show that the bulk viscosity is dramatically altered by the occupation of more than one band. The reasons for this are twofold: a multichannel system is more easily displaced from equilibrium and the associated relaxation processes lead to more rapid equilibration than in the single channel case. We estimate the bulk viscosity in terms of the underlying microscopic interactions. The experimental relevance of this physics is discussed in the context of quantum wires and trapped cold atomic gases.},
doi = {10.1103/PhysRevB.97.045135},
journal = {Physical Review B},
number = 4,
volume = 97,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2018},
month = {Mon Jan 01 00:00:00 EST 2018}
}