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Title: Higher-harmonic collective modes in a trapped gas from second-order hydrodynamics

Utilizing a second-order hydrodynamics formalism, the dispersion relations for the frequencies and damping rates of collective oscillations as well as spatial structure of these modes up to the decapole oscillation in both two- and three- dimensional gas geometries are calculated. In addition to higher-order modes, the formalism also gives rise to purely damped "non-hydrodynamic" modes. We calculate the amplitude of the various modes for both symmetric and asymmetric trap quenches, finding excellent agreement with an exact quantum mechanical calculation. Furthermore, we find that higher-order hydrodynamic modes are more sensitive to the value of shear viscosity, which may be of interest for the precision extraction of transport coefficients in Fermi gas systems.
Authors:
 [1] ;  [2]
  1. Univ. of Colorado, Boulder, CO (United States). Dept. of Physics
  2. Univ. of Colorado, Boulder, CO (United States). Dept. of Physics; Univ. of Colorado, Boulder, CO (United States). Center for Theory of Quantum Matter
Publication Date:
Grant/Contract Number:
SC0008132
Type:
Published Article
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Volume: 19; Journal Issue: 2; Journal ID: ISSN 1367-2630
Publisher:
IOP Publishing
Research Org:
Univ. of Colorado, Boulder, CO (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; collective oscillations; second-order hydrodynamics; atomic physics; transport properties; strongly interacting Fermi gases; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Strongly interacting Fermi Gases
OSTI Identifier:
1344322
Alternate Identifier(s):
OSTI ID: 1356077; OSTI ID: 1358360