Vortex Stabilization in Dilute Bose-Einstein Condensate Under Rotation
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概要
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The stability of a quaratized vortex state in Bose-Einstein condensatiorr is exanuined withinBogolitrbov theory for alkali atotn gases confined in a l'narrnonic potential trrrder forced rotartion,By solving the non-linear Bogolitrbov eqtrations coupled with the Gross-Pitavskii eqtration, theeleunentary excitations and the total energy of' the systerrns are calculated as a f'trnction of' rotationvelocity. There atre txvo distinct criteri;t of xror'tex stalcility; The jcc*sition of the excitartion energylevels relative to the condensate errer'gy lexxel yields tlae local stalcility criterion, and the totalenergy relative to th?rt of the non-vortex statte yields the glolcal stability criterion. The vortexstability phase diagratta in the rotattion velocity vs the particle density of' the systern is obtained,allowing one to locate the appropriate region to observe tlne single' qtrantized vortex.
- 社団法人日本物理学会の論文
- 1999-02-15
著者
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Machida Kazushige
Department Of Physics Kyoto University
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Isoshima Tomoya
Department Of Physics Graduate School Of Science Kyoto University
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Isoshima Toyama
Department of Physics,Okayama University
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