We show that both DC and AC Josephson effects with superfluid Fermi atoms in the BCS–BEC crossover can be described at zero temperature by a nonlinear Schrodinger equation (NLSE). By comparing our NLSE with mean-field extended BCS calculations, we find that the NLSE is reliable in the AAN side of the crossover up to the unitarity limit. The NLSE can be used for weakly-linked atomic superfluids also in the BCS side of the crossover by taking the tunneling energy as a phenomenological parameter.
DC and AC Josephson effects with superfluid Fermi atoms across a Feshbach resonance / L. Salasnich, F. Ancilotto, N. Manini, F. Toigo. - In: LASER PHYSICS. - ISSN 1054-660X. - 19:4(2009 Apr), pp. 636-641. [10.1134/S1054660X09040173]
DC and AC Josephson effects with superfluid Fermi atoms across a Feshbach resonance
N. ManiniPenultimo
;
2009
Abstract
We show that both DC and AC Josephson effects with superfluid Fermi atoms in the BCS–BEC crossover can be described at zero temperature by a nonlinear Schrodinger equation (NLSE). By comparing our NLSE with mean-field extended BCS calculations, we find that the NLSE is reliable in the AAN side of the crossover up to the unitarity limit. The NLSE can be used for weakly-linked atomic superfluids also in the BCS side of the crossover by taking the tunneling energy as a phenomenological parameter.
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