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Majorana modes and topological superfluids for ultracold fermionic atoms in anisotropic square optical lattices

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Abstract

Motivated by the recent experimental realization of two-dimensional spin-orbit coupling through optical Raman lattice scheme, we study attractive interacting ultracold gases with spin-orbit interaction in anisotropic square optical lattices, and find that rich s-wave topological superfluids can be realized, including Z2 topological superfluids beyond the characterization of “tenfold way” in addition to chiral topological superfluids. The topological defects-superfluid vortex and edge dislocations-may host Majorana modes in some topological superfluids, which are helpful for realizing topological quantum computation and Majorana fermionic quantum computation. In addition, we also discuss the Berezinsky-Kosterlitz-Thouless phase transitions for different topological superfluids.

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Authors and Affiliations

  1. School of Science, Xi’an Technological University, Xi’an, 710032, P.R. China

    Ya-Jie Wu & Ning Li

  2. Department of Physics, Beijing Normal University, Beijing, 100875, P.R. China

    Su-Peng Kou

Authors
  1. Ya-Jie Wu
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  2. Ning Li
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  3. Su-Peng Kou
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Correspondence to Ya-Jie Wu.

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Wu, YJ., Li, N. & Kou, SP. Majorana modes and topological superfluids for ultracold fermionic atoms in anisotropic square optical lattices. Eur. Phys. J. B 89, 282 (2016). https://doi.org/10.1140/epjb/e2016-70585-4

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  • DOI: https://doi.org/10.1140/epjb/e2016-70585-4

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