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arXiv 1006.3550cond-mat.quant-gas
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可调谐超流结的动力学

Dynamics of a tunable superfluid junction

L. J. LeBlanc, A. B. Bardon, J. McKeever, M. H. T. Extavour, D. Jervis, J. H. Thywissen, F. Piazza, A. Smerzi

摘要:

本文研究了双势阱中玻色-爱因斯坦凝聚体的粒子布居动力学。在高于化学势的障碍,我们观察到慢振荡以及描述的约瑟夫森模型。在低障碍的限制,基频同意一个简单的流体动力学模型,但我们也观察到第二个,更高的频率。一个完整的数值模拟的Gross-Pitaevskii方程给出的频率和振幅的观察到的模式之间的这两个限制进行比较的数据,并用于了解更高的模式的起源。被困的物质波干涉仪的影响进行了讨论。

英文摘要:

We study the population dynamics of a Bose-Einstein condensate in a double-well potential throughout the crossover from Josephson dynamics to hydrodynamics. At barriers higher than the chemical potential, we observe slow oscillations well described by a Josephson model. In the limit of low barriers, the fundamental frequency agrees with a simple hydrodynamic model, but we also observe a second, higher frequency. A full numerical simulation of the Gross-Pitaevskii equation giving the frequencies and amplitudes of the observed modes between these two limits is compared to the data and is used to understand the origin of the higher mode. Implications for trapped matter-wave interferometers are discussed.

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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