Quantum Interference Effects in Quantum Dot Molecular With Majorana Bound States

Frontiers in Physics

卷:8

Zongliu Lu¹  Lihui Wang¹  Zhen-Guo Fu²  Ping Zhang²  Tian-Yu He³  Jing Wang³  Feng Chi³  Xiao-Wen Zhang⁴ 

[1] Guilin Key Laboratory of Microelectronic Electrode Materials and Biological Nanomaterials and National Special Mineral Materials Engineering Technology Research Center and Guangxi Key Laboratory of Superhard Materials, China Monferrous Metal (Guilin) Geology and Mining Co., Ltd, Guilin, China;

[2] Institute of Applied Physics and Computational Mathematics, Beijing, China;

[3] School of Electronic and Information Engineering, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan, China;

[4] School of Materials Science and Engineering and Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin, China;

关键词: quantum dots;    Majorana bound states;    quantum interference;    Fano effect;    antiresonance;   

DOI  :  10.3389/fphy.2020.631031

来源: DOAJ

【 摘 要 】

Non-invasive detection of the Majorana bound state (MBSs), a kind of quasiparticle without charge and mass, is one of the core issues in current condensed matter physics. Here we study in theory the quantum interference effect in parallel-coupled double quantum dots which are connected either by Majorana bound states (MBSs) or regular fermions. We find that the zero-energy conductance develops a sharp peak when the dots are connected by the MBSs, whereas that in the case of the dots are coupled via regular fermions shows a valley. By varying the coupling strength between the dots and the electron reservoirs, the conductance in the two structures changes in different ways. By comparing the properties of the linear conductance in the two systems, the information of the MBSs formed at the two ends of a topological superconductor nanowire then can be inferred. We also find that the MBSs in the present structure also induces the Fano effect, and is favorable in quantum information processing.

【 授权许可】

Unknown