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Majorana Bound States Hallmarks in a Quantum Topological Interferometer Ring
Annalen Der Physik ( IF 2.4 ) Pub Date : 2021-06-15 , DOI: 10.1002/andp.202100040
Ana M. Calle 1 , Pedro A. Orellana 1 , Jorge A. Otálora 2
Affiliation  

In this work, the conductance and current correlations properties of a quantum topological interferometer consisting of a quantum dot coupled to two Majorana bound states (MBSs) confined at both ends of a 1D topological superconductor ring nanowire is investigated. The ring in its topological nontrivial and trivial phases is analyzed to show that the tunneling conductance, shot noise, and Fano factor present unique characteristics to distinguish the hallmark of MBSs. The findings are reinforced by taking advantage of the full correspondence between the quantum topological interferometer and a quantum-dot effectively coupled to a single Majorana state in a straight topological superconductor wire configuration. It is shown that besides the characteristic zero-bias conductance e 2 / 2 h and the already known shot noise features, the Fano factor provides significant information to distinguish the MBSs presence.

中文翻译:

量子拓扑干涉仪环中的 Majorana 束缚态特征

在这项工作中,研究了量子拓扑干涉仪的电导和电流相关特性,该量子拓扑干涉仪由耦合到两个马约拉纳束缚态 (MBS) 的量子点组成,该量子点限制在一维拓扑超导体环形纳米线的两端。分析拓扑非平凡和平凡阶段中的环,以表明隧道电导、散粒噪声和 Fano 因子呈现出独特的特征来区分 MBS 的标志。通过利用量子拓扑干涉仪和量子点之间的完全对应关系,该量子点在直线拓扑超导线配置中有效耦合到单个马约拉纳态,从而加强了这些发现。结果表明,除了特征零偏置电导 电子 2 / 2 H 和已知的散粒噪声特征一样,Fano 因子提供了重要的信息来区分 MBS 的存在。
更新日期:2021-08-07
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