Equilibration of quasi-one-dimensional Fermi gases

DeGottardi, Wade; Matveev, K. A.

doi:10.1103/PhysRevB.99.245121

Title: Equilibration of quasi-one-dimensional Fermi gases

Journal Article · 11 June 2019 · Physical Review B

DOI: https://doi.org/10.1103/PhysRevB.99.245121 · OSTI ID:1526639

DeGottardi, Wade ^[1]; Matveev, K. A. ^[2]

Univ. of Maryland, College Park, MD (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)

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.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1526639

Alternate ID(s):: OSTI ID: 1546232

Journal Information:: Physical Review B, Vol. 99, Issue 24; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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