Collective Modes in a Unitary Fermi Gas across the Superfluid Phase Transition
Name
Tey-2013-Collective Modes in a Unitary Fermi Gas across the Superfluid Phase Transition.pdf
Size
299.92 KB
Format
Adobe PDF
Checksum (MD5)
33a223b82b063a744660c4a961130410
Author(s)
Tey, Meng Khoon
Sidorenkov, Leonid A.
Sanchez Guajardo, Edmundo R.
Grimm, Rudolf
Zwierlein, Martin Wolfram
Hou, Yan-Hua
Pitaevskii, Lev
Stringarii, Sandro
Ku, Mark J. H.
Date Issued
January 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Tey, Meng Khoon, Leonid A. Sidorenkov, Edmundo R. Sánchez Guajardo, et al. "Collective Modes in a Unitary Fermi Gas Across the Superfluid Phase Transition." Physical Review Letters 110, 055303 (2013) [5 pages]. © 2013 American Physical Society. Web.
Version
Final published version
Abstract
We provide a joint theoretical and experimental investigation of the temperature dependence of the collective oscillations of first sound nature exhibited by a highly elongated harmonically trapped Fermi gas at unitarity, including the region below the critical temperature for superfluidity. Differently from the lowest axial breathing mode, the hydrodynamic frequencies of the higher-nodal excitations show a temperature dependence, which is calculated starting from Landau two-fluid theory and using the available experimental knowledge of the equation of state. The experimental results agree with high accuracy with the predictions of theory and provide the first evidence for the temperature dependence of the collective frequencies near the superfluid phase transition.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
MIT-Harvard Center for Ultracold Atoms
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevLett.110.055303
