Higher-harmonic collective modes in a trapped gas from second-order hydrodynamics
Abstract
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.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:
- Publication Date:
- Research Org.:
- Univ. of Colorado, Boulder, CO (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1344322
- Alternate Identifier(s):
- OSTI ID: 1356077; OSTI ID: 1358360
- Grant/Contract Number:
- SC0008132
- Resource Type:
- Published Article
- Journal Name:
- New Journal of Physics
- Additional Journal Information:
- Journal Name: New Journal of Physics Journal Volume: 19 Journal Issue: 2; Journal ID: ISSN 1367-2630
- Publisher:
- IOP Publishing
- Country of Publication:
- United Kingdom
- 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
Citation Formats
Lewis, W. E., and Romatschke, P.. Higher-harmonic collective modes in a trapped gas from second-order hydrodynamics. United Kingdom: N. p., 2017.
Web. doi:10.1088/1367-2630/aa5d6a.
Lewis, W. E., & Romatschke, P.. Higher-harmonic collective modes in a trapped gas from second-order hydrodynamics. United Kingdom. https://doi.org/10.1088/1367-2630/aa5d6a
Lewis, W. E., and Romatschke, P.. Wed .
"Higher-harmonic collective modes in a trapped gas from second-order hydrodynamics". United Kingdom. https://doi.org/10.1088/1367-2630/aa5d6a.
@article{osti_1344322,
title = {Higher-harmonic collective modes in a trapped gas from second-order hydrodynamics},
author = {Lewis, W. E. and Romatschke, P.},
abstractNote = {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.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.},
doi = {10.1088/1367-2630/aa5d6a},
journal = {New Journal of Physics},
number = 2,
volume = 19,
place = {United Kingdom},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}
https://doi.org/10.1088/1367-2630/aa5d6a
Web of Science