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arXiv 2404.05935cond-mat.mes-hallquant-ph
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杂化纳米线中的饰 Majorana 费米子

Dressed Majorana fermion in a hybrid nanowire

Beijing Computational Science Research Center(北京计算科学研究中心);Graduate School of China Academy of Engineering Physics(中国工程物理研究院研究生部);School of Physics, Peking University(北京大学物理学院)

Guo-Jian Qiao, Xin Yue, C. P. Sun

AI总结:

本文提出了一种定义 Majorana 费米子的新方法,通过结合纳米线和超导体的准激发,揭示了化学势和 Zeeman 能量对 Majorana 阶段的影响,并提供了实验指导。

摘要:

杂化纳米线系统的低能理论无法在强隧道效应和磁场强度下定义 Majorana 费米子(MF)。为解决这一限制,我们提出了一种全面的方法来定义 MF,其中纳米线和超导体中的准激发共同构成其自身的『反粒子』。这种定义是通用的,超越了低能理论中的约束。它揭示了 Majorana 阶段不仅取决于纳米线中的化学势和 Zeeman 能量,还取决于超导体中的这些参数,且化学势的不匹配会导致无法观测到 MF。这种更广泛的观点在各种条件下提供了更具体的实验指导。

英文摘要:

The low-energy theory of hybrid nanowire systems fails to define Majorana fermion (MF) in the strong tunneling and magnetic field strength. To address this limitation, we propose a holistic approach to define MF in which the quasi-excitation in nanowire and superconductor constitutes together its own ``antiparticles''. This definition is general, beyond the constraint presented in the low-energy theory. It reveals that the Majorana phase depends not only on the chemical potential and Zeeman energy in nanowire but also on those of superconductor, and that the mismatch of chemical potential leads not to observe MF. Such a broader perspective provides more specific experimental guidance under various conditions

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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