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Title: Equilibration of quasi-one-dimensional Fermi gases

Abstract

One-dimensional systems often possess multiple channels or bands arising from the excitation of transverse degrees of freedom. In this work, we study the specific processes that dominate the equilibration of multichannel Fermi gases at low temperatures. Focusing on the case of two channels, we perform an analysis of the relaxation properties of these systems by studying the spectrum and eigenmodes of the linearized collision integral. As an application of this analysis, a detailed calculation of the bulk viscosity is presented. As a result, the dominant scattering processes obey an unexpected conservation law which is likely to affect the hydrodynamic behavior of these systems.

Authors:
 [1];  [2]
  1. Univ. of Maryland, College Park, MD (United States)
  2. 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:
1526639
Alternate Identifier(s):
OSTI ID: 1546232
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 24; 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. Equilibration of quasi-one-dimensional Fermi gases. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.99.245121.
DeGottardi, Wade, & Matveev, K. A. Equilibration of quasi-one-dimensional Fermi gases. United States. doi:10.1103/PhysRevB.99.245121.
DeGottardi, Wade, and Matveev, K. A. Tue . "Equilibration of quasi-one-dimensional Fermi gases". United States. doi:10.1103/PhysRevB.99.245121. https://www.osti.gov/servlets/purl/1526639.
@article{osti_1526639,
title = {Equilibration of quasi-one-dimensional Fermi gases},
author = {DeGottardi, Wade and Matveev, K. A.},
abstractNote = {One-dimensional systems often possess multiple channels or bands arising from the excitation of transverse degrees of freedom. In this work, we study the specific processes that dominate the equilibration of multichannel Fermi gases at low temperatures. Focusing on the case of two channels, we perform an analysis of the relaxation properties of these systems by studying the spectrum and eigenmodes of the linearized collision integral. As an application of this analysis, a detailed calculation of the bulk viscosity is presented. As a result, the dominant scattering processes obey an unexpected conservation law which is likely to affect the hydrodynamic behavior of these systems.},
doi = {10.1103/PhysRevB.99.245121},
journal = {Physical Review B},
number = 24,
volume = 99,
place = {United States},
year = {2019},
month = {6}
}

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