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arXiv 1408.3293cond-mat.quant-gasnlin.PS
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搅拌环形玻色-爱因斯坦凝聚体中的涡旋激发

Vortex excitation in a stirred toroidal Bose-Einstein condensate

A. I. Yakimenko, K. O. Isaieva, S. I. Vilchinskii, E. A. Ostrovskaya

摘要:

受最近实验的启发[Wright等人,Phys.Rev.A88,063633(2013)],我们研究了由窄的蓝色失谐光束搅拌的环形BEC中的涡旋的形成。在二维平均场模型的框架下,我们研究了参数与实验条件相匹配的凝聚体的耗散动力学。涡-反涡对出现在搅拌器的中心附近的大部分冷凝物中,用于搅拌梁的缓慢运动。当障碍物的角速度大于某一临界值时,外缘面模态发展并分裂成进入凝结环的旋涡。我们确定了在搅拌的环形冷凝物中产生涡旋激发的条件,并将我们的结果与实验观察进行了比较。

英文摘要:

Motivated by the recent experiment [Wright et al., Phys. Rev. A 88, 063633 (2013)], we investigate formation of vortices in an annular BEC stirred by a narrow blue-detuned optical beam. In the framework of a two-dimensional mean field model, we study the dissipative dynamics of the condensate with parameters matched to the experimental conditions. Vortex-antivortex pairs appear near the center of the stirrer in the bulk of the condensate for slow motion of the stirring beam. When the barrier angular velocity is above some critical value, an outer edge surface mode develops and breaks into the vortices entering the condensate annulus. We determine the conditions for creation of the vortex excitations in the stirred toroidal condensate and compare our results with the experimental observations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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