The dynamics of triple-well trapped Bose-Einstein condensates with atoms feeding and loss effects  

作　　者：穆爱霞 周小燕 薛具奎 

机构地区：[1]College of Physics and Electronics Engineering,Northwest Normal University

出　　处：《Chinese Physics B》2008年第3期764-770,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos10774120and10475066);the Natural Science Foundation of Gansu Province,China(Grant No3ZS051-A25-013);the Natural Science Foundation of Northwest Normal University of China(Grant No NWNU-KJCXGC-03-17)

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 ：r-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.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 ：r-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.

关 键 词：Bose-Einstein condensates three-body recombination and atoms feeding quantum self- trapping quantum tunnelling 

分 类 号：O469[理学—凝聚态物理] O562[理学—电子物理学]