Stochastic calculation of tunneling in systems with many degrees of freedom.
Stochastic calculation of tunneling in systems with many degrees of freedom.
复制标题
多自由度系统中隧道掘进的随机计算。
DOI：
10.1103/physrevc.37.1513
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
Negele
中科院分区：
文献类型：
--
作者：
Alexandrou;Negele
提出了一种求解量子多体系统隧穿问题随机解的新方法。通过扩展大都会算法的标准实现，以包括由半经典瞬子解激励的集体更新，克服了捕获在局部极小值的行动的主要实际问题。我们证明了我们的方法的准确性的情况下，隧道在一个自由度，并将其应用到一个模型的多费米子系统在一个空间维度，经历自发对称裂变。
A new method is presented for the stochastic solution of tunneling problems in quantum many-body systems. The primary practical problem of trapping in local minima of the action is overcome by extending the standard implementation of the Metropolis algorithm to include collective updates motivated by semiclassical instanton solutions. We demonstrate the accuracy of our method in the case of tunneling in one degree of freedom and apply it to a model many-fermion system in one spatial dimension which undergoes spontaneous symmetric fission.