Abstract In this paper, we consider the macroscopic quantum tunnelling and self-trapping phenomena of Bose--Einstein condensates (BECs) with three-body recombination losses and atoms feeding from thermal cloud in triple-well potential. Using the three-mode approximation, three coupled Gross--Pitaevskii equations (GPEs), which describe the dynamics of the system, are obtained. The corresponding numerical results reveal some interesting characteristics of BECs for different scattering lengths. The self-trapping and quantum tunnelling both are found in zero-phase and $\pi$-phase modes. Furthermore, we observe the quantum beating phenomenon and the resonance character during the self-trapping and quantum tunnelling. It is also shown that the initial phase has a significant effect on the dynamics of the system.
Received: 27 April 2007
Revised: 12 September 2007
Accepted manuscript online:
PACS:
03.75.Kk
(Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)
(Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency)
Fund: Project supported by
the National Natural Science Foundation of China (Grant Nos 10774120
and 10475066), the Natural Science Foundation of Gansu Province,
China (Grant No 3ZS051-A25-013), and the Natural Science Foundation
of Northwest Normal University of China (Grant No
NWNU-KJCXGC-03-17).
Cite this article:
Mu Ai-Xia(穆爱霞), Zhou Xiao-Yan(周小燕), and Xue Ju-Kui(薛具奎) The dynamics of triple-well trapped Bose--Einstein condensates with atoms feeding and loss effects 2008 Chin. Phys. B 17 764
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