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. Furthermore, the experimental relevance of this physics is discussed in the context of quantum wires and trapped cold atomic gases.
- Authors:
-
- Univ. of Maryland, College Park, MD (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- 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
- OSTI Identifier:
- 1425213
- Alternate Identifier(s):
- OSTI ID: 1417412
- Grant/Contract Number:
- AC02-06CH11357
- Resource 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)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
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. https://doi.org/10.1103/PhysRevB.97.045135
DeGottardi, Wade, and Matveev, K. A. Thu .
"Viscosity of a multichannel one-dimensional Fermi gas". United States. https://doi.org/10.1103/PhysRevB.97.045135. https://www.osti.gov/servlets/purl/1425213.
@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}
}
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