Quantum Nucleation of Phase Slips in a 1D Model of a Superfluid
Quantum Nucleation of Phase Slips in a 1D Model of a Superfluid
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超流体一维模型中相滑移的量子成核
DOI：
10.1103/physrevlett.79.5054
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发表时间：
1997
影响因子：
8.6
通讯作者：
H. Levine
中科院分区：
文献类型：
--
作者：
J. Freire;D. Arovas;H. Levine
我们使用一个基于Gross-Pitaevskii拉格朗日量的超流体的一维模型来说明一个通用的数值方法，该方法旨在寻找扩展玻色子系统中的量子隧穿率。具体来说，我们研究流动过去的障碍物，并直接解决虚时间动力学找到的{open_quotes}反弹{close_quotes}解决方案连接通过相滑移成核的亚稳态层流状态的衰减。隧穿配置的行动去为零的阈值（超流速度）为经典生产这些滑移。对其他工艺的应用进行了简要讨论。{版权} {美国物理学会}
We use a 1D model of a superfluid based on the Gross-Pitaevskii Lagrangian to illustrate a general numerical method designed to find quantum tunneling rates in extended bosonic systems. Specifically, we study flow past an obstacle and directly solve the imaginary time dynamics to find the {open_quotes}bounce{close_quotes} solution connected with the decay of the metastable laminar state via phase slip nucleation. The action for the tunneling configuration goes to zero at the threshold (in superfluid velocity) for classical production of these slips. Applications to other processes are briefly discussed. {copyright} {ital 1997} {ital The American Physical Society}