马约拉纳模侧向附着量子点的动态泄漏

J. Barański, M. Barańska, T. Zienkiewicz, R. Taranko, T. Domański
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引用次数: 8

摘要

我们研究了一种混合结构,包括附着在拓扑超导纳米线上的单能级量子点,研究了马约拉纳准粒子在法向区域上的动态转移。由于近年来这种异质结构的实验实现及其在固定条件下的研究[L]。Schneider等人,https://doi.org/10.1038/s41467-020-18540-3, Nature Communications 11, 4707(2020)],其中量子点的能级可以通过门电位来调节,我们研究了马约拉纳模式泄漏到正常区域所需的时间。我们估计,对于典型的混合结构,这个动力学过程大约需要20纳秒。我们提出了一种可行的时间分辨安德列夫隧道光谱检测的经验方案。
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Dynamical leakage of Majorana mode into side-attached quantum dot
We study a hybrid structure, comprising the single-level quantum dot attached to the topological superconducting nanowire, inspecting dynamical transfer of the Majorana quasiparticle onto normal region. Motivated by the recent experimental realization of such heterostructure and its investigation under the stationary conditions [L. Schneider et al., https://doi.org/10.1038/s41467-020-18540-3, Nature Communications 11, 4707 (2020)] where the quantum dot energy level can be tuned by gate potential we examine how much time is needed for the Majorana mode to leak into the normal region. We estimate, that for typical hybrid structures this dynamical process would take about 20 nanoseconds. We propose a feasible empirical protocol for its detection by means of the time-resolved Andreev tunneling spectroscopy.
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