中国物理B ›› 2008, Vol. 17 ›› Issue (3): 764-770.doi: 10.1088/1674-1056/17/3/005
穆爱霞, 周小燕, 薛具奎
Mu Ai-Xia(穆爱霞), Zhou Xiao-Yan(周小燕), and Xue Ju-Kui(薛具奎)†
摘要: 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.
中图分类号: (Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)