DC and AC Josephson effects with superfluid Fermi atoms across a Feshbach resonance

Details DC and AC Josephson effects with superfluid Fermi atoms across a Feshbach resonance DC and AC Josephson effects with superfluid Fermi atoms across a Feshbach resonance

2008-10-09

arxiv.org/abs/0810.1704v1

Laser Phys. 19, 636 (2009)

Physics

Condensed Matter

Other Condensed Matter

8 pages, 4 figures, presented at the Scientific Seminar on Physics of Cold Trapped Atoms, 17th International Laser Physics Wor

Scientific paper

10.1134/S1054660X09040173

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 BEC 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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