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arXiv 0909.4072cond-mat.quant-gas
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玻色-爱因斯坦凝聚体中的涡旋同步:含时Gross-Pitaevskii方程方法

Vortex Synchronization in Bose-Einstein Condensates: A Time-Dependent Gross-Pitaevskii Equation Approach

Ryan Barnett, Edward Chen, Gil Refael

摘要:

本文研究由两种不同质量的玻色子组成的旋转玻色-爱因斯坦凝聚体中的涡旋晶格。以前[1]认为这两种物质的涡旋形成束缚对,两个涡旋晶格锁定。值得注意的是,由于组成玻色子质量的差异,两种凝聚体和外部驱动都以不同的速度旋转。在本文中,我们研究的系统通过解决全两个组件的Gross-Pitaevskii方程数值。使用这种方法,我们验证了稳定的假定锁定状态,发现存在于一个磁盘中心的旋转轴,这取决于两个玻色子的质量比。我们还表明,这个锁定半径的分析估计的基础上的两体力计算同意与数值结果。

英文摘要:

In this work we consider vortex lattices in rotating Bose-Einstein Condensates composed of two species of bosons having different masses. Previously [1] it was claimed that the vortices of the two species form bound pairs and the two vortex lattices lock. Remarkably, the two condensates and the external drive all rotate at different speeds due to the disparity of the masses of the constituent bosons. In this paper we study the system by solving the full two-component Gross-Pitaevskii equations numerically. Using this approach we verify the stability of the putative locked state which is found to exist within a disk centered on the axis of rotation and which depends on the mass ratio of the two bosons. We also show that an analytic estimate of this locking radius based on a two-body force calculation agrees well with the numerical results.

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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