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Stability Diagrams of a Bose-Einstein Condensate in Excited Bloch Bands |
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| Authors: | LIANG Zhao-Xin HU Ban-Bi |
| Affiliation: | Department of Physics, Centre for Nonlinear Studies, and The Beijing-Hong Kong-Singapore Joint Centre for Nonlinear and Complex (Hong Kong), Hong Kong Baptist University, Kowloon Tong, Hong KongDepartment of Physics, University of Houston, Houston, Texas 77204-5005, USA |
| Abstract: | Landau and dynamical instabilities of a Bose-Einstein condensate (BEC) in the excited bands of a one-dimensional optical lattice are investigated by the Gross-Pitaevskii theory. Our results show that there always exists Landau instability for a BEC in the whole region of excited bands.We also map out the dangerous zones of the dynamical instability. The experimental implications of the stability diagram are discussed. |
| Keywords: | 67.80.-s 67.40.-w 03.75.Lm |
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