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Nonequilibrium dynamics and thermodynamics of a degenerate Fermi gas across a Feshbach resonance | | A. V. Andreev
; V. Gurarie
; L. Radzihovsky
; | | Date: |
30 Apr 2004 | | Journal: | Phys. Rev. Lett. 93, 130402 (2004) DOI: 10.1103/PhysRevLett.93.130402 | | Subject: | Superconductivity; Statistical Mechanics | cond-mat.supr-con cond-mat.stat-mech | | Affiliation: | University of Colorado | | Abstract: | We consider a two-species degenerate Fermi gas coupled by a diatomic Feshbach resonance. We show that the resulting superfluid can exhibit a form of coherent BEC-to-BCS oscillations in response to a nonadiabatic change in the system’s parameters, such as for example a sudden shift in the position of the Feshbach resonance. In the narrow resonance limit, the resulting soliton-like collisionless dynamics can be calculated analytically. In equilibrium the thermodynamics can be accurately computed across the full range of BCS-BEC crossover, with corrections controlled by the ratio of the resonance width to the Fermi energy. | | Source: | arXiv, cond-mat/0404724 | | Other source: | [GID 603768] pmid15524684 | | Services: | Forum | Review | PDF | Favorites | |
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