Macroscopic Periodic Tunneling of Fermi Atoms in the BCS-BEC Crossover

Details Macroscopic Periodic Tunneling of Fermi Atoms in the BCS-BEC Crossover Macroscopic Periodic Tunneling of Fermi Atoms in the BCS-BEC Crossover

2007-11-14

arxiv.org/abs/0711.2141v3

Phys. Rev. A 77, 043609 (2008)

Physics

Condensed Matter

Statistical Mechanics

6 pages 3 figures revtex

Scientific paper

10.1103/PhysRevA.77.043609

We study the macroscopic quantum tunneling of two weakly-linked superfluids made of interacting fermionic atoms. We derive atomic Josephson junction equations and find that zero-mode and pi-mode frequencies of coherent atomic oscillations depend on the tunneling coefficient and the sound velocity of the superfluid. By considering a superfluid of ^40K atoms, we calculate these oscillation frequencies in the crossover from the Bardeen-Cooper-Schrieffer state of weakly-bound Cooper pairs to the Bose-Einstein Condensate of strongly-bound molecular dimers.

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