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Topological superfluid in a fermionic bilayer optical lattice

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Abstract

In this paper, a topological superfluid phase with Chern number 𝒞 = ±1, possessing gapless edge states and non-Abelian anyons is designed in a 𝒞 = ±1 topological insulator proximity to an s-wave superfluid on an optical lattice with the effective gauge field and layer-dependent Zeeman field coupled to ultracold fermionic atoms’ pseudo spin. We also study its topological properties and calculate the phase stiffness by using the random-phase-approximation approach. Finally we derive the temperature of the Kosterlitz-Thouless transition by means of renormalized group theory. Owning to the existence of non-Abelian anyons, this 𝒞 = ±1 topological superfluid may be a possible candidate for topological quantum computation.

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Authors and Affiliations

  1. Department of Physics, Bei**g Normal University, Bei**g, 100875, P.R. China

    Ya-Jie Wu, **g He, Chun-Li Zang & Su-Peng Kou

Authors
  1. Ya-Jie Wu
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  2. **g He
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  3. Chun-Li Zang
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  4. Su-Peng Kou
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Correspondence to Su-Peng Kou.

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Wu, YJ., He, J., Zang, CL. et al. Topological superfluid in a fermionic bilayer optical lattice. Eur. Phys. J. B 86, 105 (2013). https://doi.org/10.1140/epjb/e2013-31045-1

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