Dynamics of Bose?Einstein condensate in a harmonic potential and a Gaussian energy barrier
Dynamics of Bose?Einstein condensate in a harmonic potential and a Gaussian energy barrier
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DOI：
10.1088/1674-1056/20/1/010311
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发表时间：
2011-01
影响因子：
1.7
通讯作者：
Wei Hua;Bin Li;Xue-Shen Liu
中科院分区：
文献类型：
--
作者：
Wei Hua;Bin Li;Xue-Shen Liu
通过数值求解Gross-Pitaevskii（GP）方程，研究了玻色-爱因斯坦凝聚体的动力学性质。我们研究了凝聚体的周期性行为在一个移动的谐波势，并进一步证明了隧道效应的凝聚体通过高斯能垒，这是插入后，凝聚体已被激发的谐波捕获势转移到一边。在一定条件下，初始凝聚态在隧穿时间后动态演化为两个独立的运动凝聚态。
We have studied the dynamics of Bose—Einstein condensate by solving numerically the Gross-Pitaevskii (GP) equation. We examined the periodic behaviour of the condensate in a shifted harmonic potential, and further demonstrated the tunneling effect of a condensate through a Gaussian energy barrier, which is inserted after the condensate has been excited by shifting the harmonic trapping potential to a side. Moreover, it is shown that the initial condensate evolves dynamically into two separate moving condensates after the tunneling time under certain conditions.