DC and AC Josephson effects with superfluid Fermi atoms across a Feshbach resonance
arXiv:0810.1704 · doi:10.1134/S1054660X09040173
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 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.
8 pages, 4 figures, presented at the Scientific Seminar on Physics of Cold Trapped Atoms, 17th International Laser Physics Workshop (Trondheim, June 30 - July 4, 2008)
References in corpus (10)
- Theory of ultracold Fermi gases
- General coordinate invariance and conformal invariance in nonrelativistic physics: Unitary Fermi gas
- The Josephson effect throughout the BCS-BEC crossover
- Macroscopic Periodic Tunneling of Fermi Atoms in the BCS-BEC Crossover
- Kirzhnits gradient expansion for a D-dimensional Fermi gas
- Expansion of a Fermi Cloud in the BCS-BEC Crossover
- Condensate Fraction of a Two-Dimensional Attractive Fermi Gas
- Path integral formulation of the tunneling dynamics of a superfluid Fermi gas in an optical potential
- Josephson oscillation of a superfluid Fermi gas
- Mean-Field vs Monte-Carlo equation of state for the expansion of a Fermi superfluid in the BCS-BEC crossover