Quasi-one-dimensional quantum anomalous Hall systems as new platforms for scalable topological quantum computation
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PhysRevB.97.104504.pdf
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Author(s)
Chen, Chui-Zhen
Xie, Ying-Ming
Liu, Jie
Law, K. T.
Lee, Patrick A
Date Issued
March 2018
Journal
Physical Review B
Publisher
American Physical Society
Citation
Chen, Chui-Zhen, et al. “Quasi-One-Dimensional Quantum Anomalous Hall Systems as New Platforms for Scalable Topological Quantum Computation.” Physical Review B, vol. 97, no. 10, Mar. 2018. © 2018 American Physical Society
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.97.104504
