Signature of the FFLO phase in the collective modes of a trapped ultracold Fermi gas

Details Signature of the FFLO phase in the collective modes of a trapped ultracold Fermi gas Signature of the FFLO phase in the collective modes of a trapped ultracold Fermi gas

2009-06-09

arxiv.org/abs/0906.1801v2

Phys. Rev. Lett. 103, 065301 (2009) [4 pages]

Physics

Condensed Matter

Quantum Gases

published version

Scientific paper

10.1103/PhysRevLett.103.065301

We study theoretically the collective modes of a two-component Fermi gas with attractive interactions in a quasi-one-dimensional harmonic trap. We focus on an imbalanced gas in the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase. Using a mean-field theory, we study the response of the ground state to time-dependent potentials. For potentials with short wavelengths, we find dramatic signatures in the large-scale response of the gas which are characteristic of the FFLO phase. This response provides an effective way to detect the FFLO state in experiments.

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