Vortical Solitons of Three-Dimensional Bose—Einstein Condensates under Both a Bichromatic Optical Lattice and Anharmonic Potentials

We study Bose-Einstein condensate vortical solitons under both a bichromatic optical lattice and anharmonic potential. The vortical solitons are built in the form of a layer-chain structure made up of two fundamental vortices a long the bichromatic optical lattice direction, which have not been repo...

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Veröffentlicht in:Chinese physics letters 2013-06, Vol.30 (6), p.60306-1-060306-5
Hauptverfasser: Li, Feng-Bo, Zong, Feng-De, Wang, Ying
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Sprache:eng
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Zusammenfassung:We study Bose-Einstein condensate vortical solitons under both a bichromatic optical lattice and anharmonic potential. The vortical solitons are built in the form of a layer-chain structure made up of two fundamental vortices a long the bichromatic optical lattice direction, which have not been reported before in the three-dimensional Bose-Einstein condensate. A variation approach is applied to find the optimum initial solutions of vortical solitons. The stabilities of the vortical solitons are confirmed by the numerical simulation of the time-dependent Gross-Pitaevskii equation. In particular, stable Bose-Einstein condensate vortical solitons with fundamental vortices of different atomic numbers in the external potential within a range of experimentally achievable timescales are found. We further manipulate the vortical solitons to an arbitrary position by steadily moving the bichromatic optical lattice, and find a stable region for the successful manipulation of vortical solitons without collapse. These results provide insight into controlling and manipulating the Bose-Einstein condensate vortical solitons for macroscopic quantum applications.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/30/6/060306