Phase- and spin-dependent manipulation of leakage of Majorana mode into double quantum dot

doi:10.1088/1674-1056/abe1a8

中国物理B ›› 2021, Vol. 30 ›› Issue (7): 78505-078505.doi: 10.1088/1674-1056/abe1a8

Phase- and spin-dependent manipulation of leakage of Majorana mode into double quantum dot

Fu-Bin Yang(羊富彬)^†, Gan Ren(任淦), and Lin-Guo Xie(谢林果)

Department of Physics and Key Laboratory of Photonic and Optical Detection in Civil Aviation, Civil Aviation Flight University of China, Guanghan 618307, China

收稿日期:2020-10-31 修回日期:2021-01-17 接受日期:2021-02-01 出版日期:2021-06-22 发布日期:2021-06-26
通讯作者: Fu-Bin Yang E-mail:fbinyang@qq.com
基金资助:
Project supported by the Science Foundation of Civil Aviation Flight University of China (Grant No. JG2019-19).

Phase- and spin-dependent manipulation of leakage of Majorana mode into double quantum dot

Fu-Bin Yang(羊富彬)^†, Gan Ren(任淦), and Lin-Guo Xie(谢林果)

Department of Physics and Key Laboratory of Photonic and Optical Detection in Civil Aviation, Civil Aviation Flight University of China, Guanghan 618307, China

Received:2020-10-31 Revised:2021-01-17 Accepted:2021-02-01 Online:2021-06-22 Published:2021-06-26
Contact: Fu-Bin Yang E-mail:fbinyang@qq.com
Supported by:
Project supported by the Science Foundation of Civil Aviation Flight University of China (Grant No. JG2019-19).

摘要/Abstract

摘要： We present a phase- and spin-dependent manipulation of leakage of a Majorana mode into a double quantum dot. We study the density of states (DOS) to show the effect of phase change factor on the Majorana leakage into (out) of a double quantum dot. The DOS is derived from the Green's function of the quantum dot by the equation of motion method, and exhibits a formant structure when φ=0,2π and a resonance shape when φ=0.5π and 1.5π. Also, it changes more strongly under the spin-polarized coefficient than the non-polarized lead. Such a theoretical model can be modified to explore the spin-dependent effect in the hybrid Majorana quantum dot system.

关键词: spin-dependent coupling, Majorana bound states, double quantum dots

Abstract: We present a phase- and spin-dependent manipulation of leakage of a Majorana mode into a double quantum dot. We study the density of states (DOS) to show the effect of phase change factor on the Majorana leakage into (out) of a double quantum dot. The DOS is derived from the Green's function of the quantum dot by the equation of motion method, and exhibits a formant structure when φ=0,2π and a resonance shape when φ=0.5π and 1.5π. Also, it changes more strongly under the spin-polarized coefficient than the non-polarized lead. Such a theoretical model can be modified to explore the spin-dependent effect in the hybrid Majorana quantum dot system.

Key words: spin-dependent coupling, Majorana bound states, double quantum dots

中图分类号: (Spin polarized resonant tunnel junctions)

85.75.Mm

91.62.Bf (Agricultural systems) 72.10.Fk (Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect))

Fu-Bin Yang(羊富彬), Gan Ren(任淦), and Lin-Guo Xie(谢林果). Phase- and spin-dependent manipulation of leakage of Majorana mode into double quantum dot[J]. 中国物理B, 2021, 30(7): 78505-078505.

Fu-Bin Yang(羊富彬), Gan Ren(任淦), and Lin-Guo Xie(谢林果). Phase- and spin-dependent manipulation of leakage of Majorana mode into double quantum dot[J]. Chin. Phys. B, 2021, 30(7): 78505-078505.

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Phase- and spin-dependent manipulation of leakage of Majorana mode into double quantum dot

Phase- and spin-dependent manipulation of leakage of Majorana mode into double quantum dot

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