Tunneling Dynamics of Two-Species Bose-Einstein Condensates
with Feshbach Resonances |
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Authors: | CHEN Chang-Yong |
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Institution: | Department of Physics, Loudi Teachers' College,
Loudi 417000, China |
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Abstract: | We investigate tunneling dynamics of
atomic group consisting of three atoms in Bose-Einstein condensates with Feshbach resonance. It is shown that the tunneling of the atom group depends not only on the inter-atomic nonlinear interactions and the initial
number of atoms in these condensates, but also on the tunneling coupling between the atomic condensate and the three-atomic molecular condensate. It is found that besides oscillating tunneling current between the atomic condensate and the molecular condensate, the nonlinear atomic group tunneling dynamics sustains a self-maintained population imbalance: a macroscopic quantum self-trapping effect. The influence of de-coherence caused by non-condensate atoms
on the tunneling dynamics is studied. It is indicated that de-coherence
suppresses the atomic group tunneling. |
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Keywords: | tunneling dynamics molecular Bose-Einstein condensate Feshbach resonance de-coherence |
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