Quasi-one-dimensional quantum anomalous Hall systems as new platforms for scalable topological quantum computation

Article

关键词: NON-ABELIAN STATISTICS;    MAJORANA FERMIONS;    INSULATOR;    SUPERCONDUCTOR;    ANYONS;    STATE;   

DOI  :  10.1103/PhysRevB.97.104504

来源: SCIE

【 摘 要 】

Quantum anomalous Hall insulator/superconductor heterostructures emerged as a competitive platform to realize topological superconductors with chiral Majorana edge states as shown in recent experiments [He et al. Science 357, 294 (2017)]. However, chiral Majorana modes, being extended, cannot be used for topological quantum computation. In this work, we show that quasi-one-dimensional quantum anomalous Hall structures exhibit a large topological regime (much larger than the two-dimensional case) which supports localized Majorana zero energy modes. The non-Abelian properties of a cross-shaped quantum anomalous Hall junction is shown explicitly by time-dependent calculations. We believe that the proposed quasi-one-dimensional quantum anomalous Hall structures can be easily fabricated for scalable topological quantum computation.

【 授权许可】

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