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arXiv 2007.11096cond-mat.quant-gas
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旋转环形晶格中的玻色-爱因斯坦凝聚体:多模模型

Bose-Einstein condensates in rotating ring-shaped lattices: a multimode model

M Nigro, P Capuzzi, D M Jezek

摘要:

我们建立了一个多模模型,描述了旋转的玻色-爱因斯坦凝聚体的动力学,该凝聚体被一个具有大填充数的环形光晶格限制。使用全3D Gross-Pitaevskii模拟获得作为旋转频率的函数的模型的参数。从这些数值计算中,我们提取的速度场诱导在每个网站和分析的联系和我们的模型的跳跃参数的相位和Peierls相位之间的差异。为此,这种阶段的详细讨论中提出的几何方面,考虑到不同的配置的交界处的位置。对于圆对称现场密度之间的跳跃相位和角动量的一个简单的解析关系被发现为任意数量的网站。最后,我们面对的旋转多模模型动力学的结果与Gross-Pitaevskii模拟找到一个完美的协议。

英文摘要:

We develop a multimode model that describes the dynamics on a rotating Bose-Einstein condensate confined by a ring-shaped optical lattice with large filling numbers. The parameters of the model are obtained as a function of the rotation frequency using full 3D Gross-Pitaevskii simulations. From such numerical calculations, we extract the velocity field induced at each site and analyze the relation and the differences between the phase of the hopping parameter of our model and the Peierls phase. To this end, a detailed discussion of such phases is presented in geometrical terms which takes into account the position of the junctions for different configurations. For circularly symmetric onsite densities a simple analytical relation between the hopping phase and the angular momentum is found for arbitrary number of sites. Finally, we confront the results of the rotating multimode model dynamics with Gross-Pitaevskii simulations finding a perfect agreement.

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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