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Nonlinear Landau--Zener Tunnelling with Two and Three-Body Interactions |
| WEI Xiu-Fang1,2;TANG ong-An1;YONG Wen-Mei1;XUE Ju-Kui1 |
| 1College of Physics and Electronics Engineering, Northwest Normal University, Lanzhou 7300702Department of Physics, Lanzhou City University, Lanzhou 730070 |
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| Cite this article: |
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WEI Xiu-Fang, TANG ong-An, YONG Wen-Mei et al 2008 Chin. Phys. Lett. 25 1564-1567 |
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Abstract We investigate the nonlinear Landau--Zener tunnelling of Bose--Einstein condensate (BEC) in an accelerating optical lattice with two- and three-body interactions between the particles. The influence of the three-body interaction on the eigenstates and the transition probability are discussed both
analytically and numerically. The analytical eigenstates and the tunnelling probability are obtained, which are verified by numerical methods. It is shown that the eigenstates and the tunnelling probability are modified dramatically by three-body interaction.
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| Keywords:
03.75.Fi
67.40.Db
03.65.Ge
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Received: 12 January 2008
Published: 29 April 2008
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