Tunneling Dynamics of Bose-Einstein Condensates with Feshbach Resonances

Details Tunneling Dynamics of Bose-Einstein Condensates with Feshbach Resonances Tunneling Dynamics of Bose-Einstein Condensates with Feshbach Resonances

2000-04-29

arxiv.org/abs/cond-mat/0005003v1

Physics

Condensed Matter

Soft Condensed Matter

6 pages, 2 figures, RevTex, to appear in Phys. Rev. A (July 2000)

Scientific paper

10.1103/PhysRevA.62.023610

We study tunneling dynamics of atomic pairs in Bose-Einstein condensates with Feshbach resonances. It is shown that the tunneling of the atomic pairs depends on not only the tunneling coupling between the atomic condensate and the molecular condensate, but also the inter-atomic nonlinear interactions and the initial number of atoms in these condensates. It is found that in addition to oscillating tunneling current between the atomic condensate and the molecular condensate, the nonlinear atomic-pair tunneling dynamics sustains a self-locked population imbalance: macroscopic quantum self-trapping effect. Influence of decoherence induced by non-condensate atoms on tunneling dynamics is investigated. It is shown that decoherence suppresses atomic-pair tunneling.

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