Swinburne
Browse

Collective modes and ballistic expansion of a fermi gas in the BCS-BEC crossover

Download (240.78 kB)
journal contribution
posted on 2024-07-11, 11:59 authored by Hui HuHui Hu, A. Minguzzi, Xiaji LiuXiaji Liu, M. P. Tosi
We evaluate the frequencies of collective modes and the anisotropic expansion rate of a harmonically trapped Fermi superfluid at varying coupling strengths across a Feshbach resonance driving a BCS-BEC crossover. The equations of motion for the superfluid are obtained from a microscopic mean-field expression for the compressibility and are solved within a scaling ansatz. Our results confirm nonmonotonic behavior in the crossover region and are in quantitative agreement with current measurements of the transverse breathing mode by Kinast et al. [Phys. Rev. Lett. 92, 150402 (2004)] and of the axial breathing mode by Bartenstein et al. [Phys. Rev. Lett. 92, 203201 (2004)].

History

Available versions

PDF (Accepted manuscript)

ISSN

0031-9007

Journal title

Physical Review Letters

Volume

93

Issue

19

Article number

article no. 190403

Publisher

American Physical Society

Copyright statement

Copyright © 2004 The American Physical Society. The accepted manuscript is reproduced for noncommerical purposes only in accordance with the copyright policy of the publisher.

Language

eng

Usage metrics

    Publications

    Categories

    No categories selected

    Keywords

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC