Quantum dynamics of atomic bright solitons under splitting and recollision, and implications for interferometry
Quantum dynamics of atomic bright solitons under splitting and recollision, and implications for interferometry
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DOI：
10.1088/1367-2630/14/4/043040
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发表时间：
2012-04-27
影响因子：
3.3
通讯作者：
Ruostekoski, J.
中科院分区：
文献类型：
--
作者：
Martin, A. D.;Ruostekoski, J.
用数值方法研究了高斯势垒高拉长一维谐振态中原子亮孤子的经典和量子动力学。在Dyke等人最近的实验条件下，系统实现了相干非线性孤子分束器和干涉仪，并对其精度进行了分析。在更严格的径向陷阱限制和增强的量子涨落的情况下，分裂孤子可以代表自旋压缩，或者替代地，代表具有降低的相位相干性的碎裂凝聚体，可以通过势垒干扰分裂孤子来测量。我们还发现，由于与势垒的非线性相互作用，孤子的位置和动量存在很大的量子力学不确定性。
We numerically study the classical and quantum dynamics of an atomic bright soliton in a highly elongated one-dimensional harmonic trap with a Gaussian barrier. In the regime of the recent experiment by Dyke et al the system realizes a coherent nonlinear soliton beam-splitter and interferometer whose accuracy we analyze. In the case of tighter radial trap confinement and enhanced quantum fluctuations, a split soliton can represent a spin-squeezed, or alternatively, a fragmented condensate with reduced phase coherence that can be measured by interfering the split soliton by the barrier. We also find large quantum mechanical uncertainties in the soliton's position and momentum due to nonlinear interaction with the barrier.