Abstract

Tunneling dynamics of multi-atomic molecules between anytwo multi-atomic molecular Bose–Einstein condensates with Feshbach resonanceis investigated. It is indicated that the tunneling in the two Bose–Einsteincondensates depends not only on the inter-molecular nonlinear interactionsand the initial number of molecule in these condensates, but also on thetunneling coupling between them. It is discovered that besides oscillatingtunneling current between the multi-atomic molecular condensates, thenonlinear multi-atomic molecular tunneling dynamics sustains a self-lockedpopulation imbalance: a macroscopic quantum self-trapping effect. Theinfluence of de-coherence caused by non-condensate molecule on thetunneling dynamics is studied. It is shown that de-coherence suppresses themulti-atomic molecular tunneling.

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