Decay of superflow confined in thin torus: A realization of tunneling quantum fields
Decay of superflow confined in thin torus: A realization of tunneling quantum fields
复制标题
限制在薄环内的超流衰变：隧道量子场的实现
DOI：
10.1143/jpsj.68.3778
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发表时间：
1998
影响因子：
1.7
通讯作者：
S. Kurihara
中科院分区：
文献类型：
--
作者：
M. Nishida;S. Kurihara
用集体坐标方法研究了薄圆环中中性超流体相滑移的量子成核。我们设计了一个集体坐标来描述相滑移的量子成核过程。考虑作用量局部极小值附近的量子涨落，我们计算了相位滑移的有效质量。由于凝聚体在整个环面中的相干性，有效质量与环面的周长L成正比，并且衰变率具有很强的指数L依赖性。
The quantum nucleation of phase slips in neutral superfluids confined in a thin torus is investigated by means of the collective coordinate method. We have devised, with numerical justification, a certain collective coordinate to describe the quantum nucleation process of a phase slip. Considering the quantum fluctuation around the local minimum of the action, we calculate the effective mass of the phase slip. Due to the coherence of the condensate throughout the torus, the effective mass is proportional to the circumference L of the torus, and the decay rate has a strong exponential L -dependence.