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arXiv 1708.03096cond-mat.mes-hallcond-mat.supr-con
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动态电流极化率作为硅基约瑟夫森结中Majorana束缚态的探针

Dynamic current susceptibility as a probe of Majorana bound states in nanowire-based Josephson junctions

Mircea Trif, Olesia Dmytruk, Helene Bouchiat, Ramon Aguado, Pascal Simon

摘要:

我们从理论上研究了基于半导体纳米线的约瑟夫森结在随时间变化的磁通偏置下的特性。我们建立了一个通用的密度矩阵方法的Majorana结的动态响应,并计算所得的磁通依赖的磁化率使用微观和有效的低能量描述的纳米线。我们发现,对角分量的磁化率,与动态的马约拉纳州人口,占主导地位的标准久保贡献范围广泛的实验相关参数。对角项,迄今为止未探索的马约拉纳物理学的背景下,允许准确地探测存在的马约拉纳结合态的结。

英文摘要:

We theoretically study a Josephson junction based on a semiconducting nanowire subject to a time-dependent flux bias. We establish a general density matrix approach for the dynamical response of the Majorana junction and calculate the resulting flux-dependent susceptibility using both microscopic and effective low-energy descriptions for the nanowire. We find that the diagonal component of the susceptibility, associated with the dynamics of the Majorana states populations, dominates over the standard Kubo contribution for a wide range of experimentally relevant parameters. The diagonal term, thus far unexplored in the context of Majorana physics, allows to probe accurately the presence of Majorana bound states in the junction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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