pt对称准粒子中毒引起的马约拉纳束缚态的调制非定域性

IF 2.6 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Physics Letters A Pub Date : 2025-02-05 DOI:10.1016/j.physleta.2024.130188

Cui Jiang , Jia-Rui Li , Lian-Lian Zhang , Wei-Jiang Gong

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引用次数: 0

摘要

通过考虑将一根拓扑超导纳米线与金属引线平行耦合，我们研究了以零偏导峰为特征的Majorana束缚态（mbs）的非局域性。结果表明，pt对称准粒子中毒可以通过猝灭其诱导的零偏导峰来湮灭Majorana非定域性。然而，当mbs间非零耦合破坏马约拉纳非定域性时，这种准粒子中毒可以缓解零偏置电导下降。值得注意的是，当准粒子中毒达到异常点时，mbs的非局域性可以恢复，表现为零偏导峰的出现。我们相信我们的发现有助于理解pt对称准粒子中毒的MBS性质。

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Modulated nonlocality of Majorana bound states due to the presence of PT-symmetric quasiparticle poisoning

By considering one topological superconducting nanowire to be coupled to the metallic leads in a parallel way, we investigate the nonlocality of the Majorana bound states (MBSs) characterized by the zero-bias conductance peak. It is shown that

PT

-symmetric quasiparticle poisoning can annihilate the Majorana nonlocality by quenching its-induced zero-bias conductance peak. However, when the Majorana nonlocality is destroyed by the nonzero inter-MBS coupling, this quasiparticle poisoning can relieve the zero-bias conductance dip. What is notable is that as the quasiparticle poisoning reaches its exceptional point, the nonlocality of MBSs can be restored, manifested as the appearance of zero-bias conductance peak. We believe that our findings are helpful for understanding the MBS properties with

PT

-symmetric quasiparticle poisoning.

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来源期刊

Physics Letters A 物理-物理：综合

CiteScore

5.10

自引率

3.80%

发文量

493

审稿时长

30 days

期刊介绍： Physics Letters A offers an exciting publication outlet for novel and frontier physics. It encourages the submission of new research on: condensed matter physics, theoretical physics, nonlinear science, statistical physics, mathematical and computational physics, general and cross-disciplinary physics (including foundations), atomic, molecular and cluster physics, plasma and fluid physics, optical physics, biological physics and nanoscience. No articles on High Energy and Nuclear Physics are published in Physics Letters A. The journal''s high standard and wide dissemination ensures a broad readership amongst the physics community. Rapid publication times and flexible length restrictions give Physics Letters A the edge over other journals in the field.