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arXiv 1409.6166cond-mat.quant-gasquant-ph
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玻色-爱因斯坦凝聚体的整体特征对涡旋速度的影响

Influence of global features of a Bose-Einstein condensate on the vortex velocity

H. M. Cataldo, D. M. Jezek

摘要:

本文研究了在环形阱中的玻色-爱因斯坦凝聚体中,囚禁势的几何形状对涡旋速度的影响。我们通过一个简单的关系,这样的速度和数值获得的涡旋能量的梯度计算的涡旋进动速度。我们观察到,我们的结果非常接近通过时间演化模拟计算的速度。然而,我们发现,来自现有的速度场公式的估计提出了明显的差异。为了解决这种矛盾,我们进一步研究了诱导速度场,分析了凝聚体的整体特征对诱导速度场和进动速度的影响。

英文摘要:

We study the way in which the geometry of the trapping potential affects the vortex velocity in a Bose-Einstein condensate confined by a toroidal trap. We calculate the vortex precession velocity through a simple relationship between such a velocity and the gradient of the numerically obtained vortex energy. We observe that our results correspond very closely to the velocity calculated through time evolution simulations. However, we find that the estimates derived from available velocity field formulas present appreciable differences. To resolve such discrepancies, we further study the induced velocity field, analyzing the effect of global features of the condensate on such a field and on the precession velocity.

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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