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

Lewis, W. E.; Romatschke, P.

doi:10.1088/1367-2630/aa5d6a

Title: 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:: Lewis, W. E.; Romatschke, P.

Publication Date:: Wed Feb 01 00:00:00 EST 2017

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.

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                    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

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                    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.

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@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}

}

Copy to clipboard

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

Abstract

Citation Formats

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