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arXiv 1502.05940cond-mat.quant-gas
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可混溶二组分玻色-爱因斯坦凝聚体密度分布的Beyond Thomas-Fermi分析

Beyond Thomas--Fermi analysis of the density profiles of a miscible two-component Bose--Einstein condensate

J. Polo, P. Mason, S. Sridhar, T. P. Billam, V. Ahufinger, S. A. Gardiner

摘要:

我们调查了一个谐波捕获的两个组件的玻色-爱因斯坦凝聚体内的混溶制度,接近其边界,不同比例的有效内部和物种间的相互作用。我们推导出一个通用的方程,分析周围的密度在一个,两个和三个维度的不同的边界,共存和空间分离的制度。我们还提出了一个一般的程序来解决托马斯-费米近似在所有三个空间维度,减少空间分离的情况下,在一个单一的数值反演的托马斯-费米问题的复杂性。最后,我们分析确定系统的两个不同制度之间的边界。

英文摘要:

We investigate a harmonically trapped two-component Bose--Einstein condensate within the miscible regime, close to its boundaries, for different ratios of effective intra- and inter-species interactions. We derive analytically a universal equation for the density around the different boundaries in one, two and three dimensions, for both the coexisting and spatially separated regimes. We also present a general procedure to solve the Thomas--Fermi approximation in all three spatial dimensionalities, reducing the complexity of the Thomas--Fermi problem for the spatially separated case in one and three dimensions to a single numerical inversion. Finally, we analytically determine the frontier between the two different regimes of the system.

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