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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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