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Landau and Dynamical Instabilities of the Superflow of Bose-Einstein Condensates in Optical Lattices | | Biao Wu
; Qian Niu
; | | Date: |
29 Sep 2000 | | Journal: | Phys. Rev. A, 64 (2001) 061603(R) | | Subject: | cond-mat | | Abstract: | The superfluidity of Bose-Einstein condensates in optical lattices are investigated. Apart from the usual Landau instability which occurs when a BEC flows faster than the speed of sound, the BEC can also suffer a dynamical instability, resulting in period doubling and other sorts of symmetry breaking of the system. Such an instability may play a crucial role in the dissipative motion of a trapped BEC in an optical lattice recently observed [1]. | | Source: | arXiv, cond-mat/0009455 | | Services: | Forum | Review | PDF | Favorites | |
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