Abstract
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)].
Hui, Hu;
Minguzzi, A;
Tosi, M P;
[1]
Xiaji, Liu
[2]
- NEST-INFM and Classe di Scienze, Scuola Normale Superiore, I-56126 Pisa (Italy)
- Department of Physics, Tsinghua University, Beijing 100084 (China)
Citation Formats
Hui, Hu, Minguzzi, A, Tosi, M P, and Xiaji, Liu.
Collective modes and ballistic expansion of a Fermi gas in the BCS-BEC crossover.
United States: N. p.,
2004.
Web.
doi:10.1103/PhysRevLett.93.190403.
Hui, Hu, Minguzzi, A, Tosi, M P, & Xiaji, Liu.
Collective modes and ballistic expansion of a Fermi gas in the BCS-BEC crossover.
United States.
https://doi.org/10.1103/PhysRevLett.93.190403
Hui, Hu, Minguzzi, A, Tosi, M P, and Xiaji, Liu.
2004.
"Collective modes and ballistic expansion of a Fermi gas in the BCS-BEC crossover."
United States.
https://doi.org/10.1103/PhysRevLett.93.190403.
@misc{etde_20619296,
title = {Collective modes and ballistic expansion of a Fermi gas in the BCS-BEC crossover}
author = {Hui, Hu, Minguzzi, A, Tosi, M P, and Xiaji, Liu}
abstractNote = {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)].}
doi = {10.1103/PhysRevLett.93.190403}
journal = []
issue = {19}
volume = {93}
journal type = {AC}
place = {United States}
year = {2004}
month = {Nov}
}
title = {Collective modes and ballistic expansion of a Fermi gas in the BCS-BEC crossover}
author = {Hui, Hu, Minguzzi, A, Tosi, M P, and Xiaji, Liu}
abstractNote = {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)].}
doi = {10.1103/PhysRevLett.93.190403}
journal = []
issue = {19}
volume = {93}
journal type = {AC}
place = {United States}
year = {2004}
month = {Nov}
}