AI 中文总结
本研究通过非平衡格林函数方法计算了双量子点阿哈罗诺夫-玻姆干涉仪中马约拉纳束缚态辅助输运的电流、散粒噪声和法诺因子，发现半通量条件下相消干涉增强马约拉纳特征，证明有限偏压散粒噪声谱学是探测马约拉纳束缚态的灵敏间接手段。
AI 中文摘要
在这项工作中，我们研究了由两个平行量子点组成的阿哈罗诺夫-玻姆干涉仪中的有限偏压电荷电流、散粒噪声和法诺因子，每个量子点侧耦合到一个拓扑超导纳米线，该纳米线由有效基塔耶夫链表示，其两端承载马约拉纳束缚态。输运性质采用非平衡格林函数形式在运动方程方法内计算。我们的结果表明，与马约拉纳束缚态的耦合显著改变了干涉图案，在电流、散粒噪声和法诺因子中产生了独特的特征。这些特征在半通量条件下尤为明显，此时相消干涉抑制了常规输运背景并增强了马约拉纳辅助输运的可见性。这些发现表明，有限偏压散粒噪声谱学为混合超导-纳米线干涉仪中的马约拉纳束缚态提供了灵敏的间接探针。
英文摘要
In this work, we investigate the finite-bias charge current, shot noise, and Fano factor in an Aharonov-Bohm interferometer composed of two parallel quantum dots, each side-coupled to a topological superconducting nanowire represented by an effective Kitaev chain hosting Majorana bound states at its ends. The transport properties are calculated using the nonequilibrium Green's function formalism within the equation-of-motion approach. Our results show that coupling to the Majorana bound states significantly modifies the interference pattern, producing distinctive signatures in the current, shot noise, and Fano factor. These signatures are particularly pronounced at the half-flux condition, where destructive interference suppresses the conventional transport background and enhances the visibility of Majorana-assisted transport. These findings demonstrate that finite-bias shot-noise spectroscopy provides a sensitive indirect probe of Majorana bound states in hybrid superconducting-nanowire interferometers.
Comments11 pages, 10 figures, 1 appendix
