skip to main content

DOE PAGESDOE PAGES

This content will become publicly available on January 18, 2019

Title: Viscosity of a multichannel one-dimensional Fermi gas

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. Furthermore, the experimental relevance of this physics is discussed in the context of quantum wires and trapped cold atomic gases.
Authors:
 [1] ;  [2]
  1. Univ. of Maryland, College Park, MD (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 4; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1425213
Alternate Identifier(s):
OSTI ID: 1417412

DeGottardi, Wade, and Matveev, K. A.. Viscosity of a multichannel one-dimensional Fermi gas. United States: N. p., 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.. 2018. "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. Furthermore, 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 = {2018},
month = {1}
}