Exact quantum dynamics of a bosonic Josephson junction.
Exact quantum dynamics of a bosonic Josephson junction.
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DOI：
10.1103/physrevlett.103.220601
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发表时间：
2009-05
影响因子：
8.6
通讯作者：
K. Sakmann;A. Streltsov;O. Alon;L. Cederbaum
中科院分区：
文献类型：
--
作者：
K. Sakmann;A. Streltsov;O. Alon;L. Cederbaum
通过数值求解含时多玻色子薛定谔方程，研究了一维玻色子约瑟夫森结的量子动力学。对于弱的粒子间相互作用，在短时间尺度上，通常使用的平均场和多体方法被发现与精确的动力学有很大的偏离。该系统表现出丰富的多体动力学，如增强的隧道效应和一种新的依赖于相互作用的结平衡现象，这归因于快速的相干性损失。
The quantum dynamics of a one-dimensional bosonic Josephson junction is studied by solving the time-dependent many-boson Schrödinger equation numerically exactly. Already for weak interparticle interactions and on short time scales, the commonly employed mean-field and many-body methods are found to deviate substantially from the exact dynamics. The system exhibits rich many-body dynamics such as enhanced tunneling and a novel equilibration phenomenon of the junction depending on the interaction, which is attributed to a quick loss of coherence.