Coulomb-assisted nonlocal electron transport between two pairs of Majorana bound states in a superconducting island

doi:10.1088/1674-1056/ad2a68

中国物理B ›› 2024, Vol. 33 ›› Issue (5): 50310-050310.doi: 10.1088/1674-1056/ad2a68

Coulomb-assisted nonlocal electron transport between two pairs of Majorana bound states in a superconducting island

Hao-Di Wang(王浩迪), Jun-Tong Ren(任俊潼), Hai-Feng Lü(吕海峰)†, and Sha-Sha Ke(柯莎莎)‡

School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China

收稿日期:2023-09-26 修回日期:2024-01-24 接受日期:2024-02-19 出版日期:2024-05-20 发布日期:2024-05-20
通讯作者: Hai-Feng Lu, Sha-Sha Ke E-mail:lvhf04@uestc.edu.cn;keshasha@uestc.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 12074209 and 12274063), the Fundamental Research Funds for the Central Universities (Grant No. ZYGX2019J100), and the Open Project of State Key Laboratory of Low-Dimensional Quantum Physics (Grant No. KF202008)

Coulomb-assisted nonlocal electron transport between two pairs of Majorana bound states in a superconducting island

Hao-Di Wang(王浩迪), Jun-Tong Ren(任俊潼), Hai-Feng Lü(吕海峰)†, and Sha-Sha Ke(柯莎莎)‡

School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China

Received:2023-09-26 Revised:2024-01-24 Accepted:2024-02-19 Online:2024-05-20 Published:2024-05-20
Contact: Hai-Feng Lu, Sha-Sha Ke E-mail:lvhf04@uestc.edu.cn;keshasha@uestc.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 12074209 and 12274063), the Fundamental Research Funds for the Central Universities (Grant No. ZYGX2019J100), and the Open Project of State Key Laboratory of Low-Dimensional Quantum Physics (Grant No. KF202008)

摘要/Abstract

摘要： We investigate the nonlocal transport modulated by Coulomb interactions in devices comprising two interacting Majorana wires, where both nanowires are in proximity to a mesoscopic superconducting (SC) island. Each Majorana bound state (MBS) is coupled to one lead via a quantum dot with resonant levels. In this device, the nonlocal correlations can be induced in the absence of Majorana energy splitting. We find that the negative differential conductance and giant current noise cross correlation could be induced, due to the interplay between nonlocality of MBSs and dynamical Coulomb blockade effect. This feature may provide a signature for the existence of the MBSs.

关键词: Majorana bound states, superconducting island, current cross correlation

Abstract: We investigate the nonlocal transport modulated by Coulomb interactions in devices comprising two interacting Majorana wires, where both nanowires are in proximity to a mesoscopic superconducting (SC) island. Each Majorana bound state (MBS) is coupled to one lead via a quantum dot with resonant levels. In this device, the nonlocal correlations can be induced in the absence of Majorana energy splitting. We find that the negative differential conductance and giant current noise cross correlation could be induced, due to the interplay between nonlocality of MBSs and dynamical Coulomb blockade effect. This feature may provide a signature for the existence of the MBSs.

Key words: Majorana bound states, superconducting island, current cross correlation

中图分类号: (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)

03.75.Lm

72.10.-d (Theory of electronic transport; scattering mechanisms) 74.78.Na (Mesoscopic and nanoscale systems) 73.21.La (Quantum dots)

Hao-Di Wang(王浩迪), Jun-Tong Ren(任俊潼), Hai-Feng Lü(吕海峰), and Sha-Sha Ke(柯莎莎). Coulomb-assisted nonlocal electron transport between two pairs of Majorana bound states in a superconducting island[J]. 中国物理B, 2024, 33(5): 50310-050310.

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Coulomb-assisted nonlocal electron transport between two pairs of Majorana bound states in a superconducting island

Coulomb-assisted nonlocal electron transport between two pairs of Majorana bound states in a superconducting island

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