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arXiv 1006.2645quant-phcond-mat.quant-gas
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非对称二维磁晶格中超冷原子的宏观类Rabi振荡

Macroscopic Rabi-Like Oscillations of Ultracold Atoms in an Asymmetrical Two-Dimensional Magnetic Lattice

A. Abdelrahman, M. Vasiliev, K. Alameh

摘要:

本文研究了在非对称二维磁晶格中囚禁的超冷量子简并气体(如玻色-爱因斯坦凝聚体)中$macroscopic$ $quantum$ $phase$的存在性。我们指出了在新的二维磁晶格中,通过外加偏磁场来控制隧穿的关键。宏观量子相位签名被确定为拉比振荡时,解决耦合的时间相关的微分方程,这里描述的玻色子约瑟夫森结(BJJ)的系统。在求解系统的BJJ,我们使用了一个序参量,其中包括两个随时间变化的参数,这是在每个晶格位置的分数人口和相位差。BJJ解为宏观量子相干性提供了一个明确的证据。

英文摘要:

We investigate the existence of the $macroscopic$ $quantum$ $phase$ in trapped ultracold quantum degenerate gases, such as Bose-Einstein condensate, in an asymmetrical two-dimensional magnetic lattice. We show the key to adiabatically control the tunneling in the new two-dimensional magnetic lattice by means of external magnetic bias fields. The macroscopic quantum phase signature is identified as a Rabi-like oscillation when solving the system of coupled time-dependent differential equations, described here by the Boson Josephson Junctions (BJJs). In solving the system of the BJJs we used an order parameter that includes both time-dependent variational parameters which are the fractional population at each lattice site and the phase difference. The BJJs solution presents a clear evidence for the macroscopic quantum coherence.

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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