A Cold Atomic Fermi Gas with a Spatially Modulated Interaction

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We study an ultra-cold atomic Fermi Gas with the atom-atom interaction modulated periodically in space. A novel ground state with cooper pairs occupying non-zero center of mass momenta is found. Such a state is closely related to the state proposed by Fulde, Ferrell, Larkin, and Ovchinnikov(FFLO). The resultant single particle excitations with momenta along the direction of the modulation shows multiple-gap structures. Such a system can be realized in experiment with a spatially modulated Feshbach resonance. Experimental signatures of such a state are discussed.
11 pages, 3 figures, replaced with eps figures

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Superconductivity, Other Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/117485

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0610844
 http://arxiv.org/abs/cond-mat/0610844

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arXiv