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

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.

arXiv comment8 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)

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Cited by in corpus (10)

• Quantized Superfluid Vortex Rings in the Unitary Fermi Gas
• Self-trapping of a Fermi super-fluid in a double-well potential in the BEC-unitarity crossover
• Validating Simple Dynamical Simulations of the Unitary Fermi Gas
• Strength of the Vortex-Pinning Interaction from Real-Time Dynamics
• Low-temperature thermodynamics of the unitary Fermi gas: superfluid fraction, first sound and second sound
• Dark solitons dynamics and snake instability in superfluid Fermi gases trapped by an anisotropic harmonic potential
• Josephson oscillations and self-trapping of superfluid fermions in a double-well potential
• Viscosity-entropy ratio of the unitary Fermi gas from zero-temperature elementary excitations
• Universal Aspects of Vortex Reconnections across the BCS-BEC Crossover
• Critical velocity, vortex shedding and drag in a unitary Fermi superfluid