Localized Many-Particle Majorana Modes with Vanishing Time-Reversal Symmetry Breaking in Double Quantum Dots

被引：9

作者：

Wright, Anthony R. ^{[1
]}

Veldhorst, Menno ^{[2
]}

机构：

[1] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia

[2] Univ New S Wales, Sch Elect Engn & Telecommun, ARC Ctr Excellence Quantum Computat & Commun Tech, Sydney, NSW 2052, Australia

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 09期

基金：

澳大利亚研究理事会;

关键词：

TOPOLOGICAL INSULATOR; SUPERCURRENT; STATES; STATISTICS; TRANSPORT; SURFACE;

D O I：

10.1103/PhysRevLett.111.096801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We introduce the concept of spinful many-particle Majorana modes with local odd operator products, thereby preserving their local statistics. We consider a superconductor-double-quantum-dot system where these modes can arise with negligible Zeeman splitting when Coulomb interactions are present. We find a reverse Mott-insulator transition, where the even- and odd-parity bands become degenerate. Above this transition, Majorana operators move the system between the odd-parity ground state, associated with elastic cotunneling, and the even- parity ground state, associated with crossed Andreev reflection. These Majorana modes are described in terms of one, three, and five operator products. Parity conservation results in a 4 pi periodic supercurrent in the even state and no supercurrent in the odd state.

引用

页数：5

共 36 条

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