Non-Abelian dynamical gauge field and topological superfluids in optical Raman lattice

• URL: http://arxiv.org/abs/2309.12923v2
• Date: Tue, 26 Sep 2023 15:41:50 GMT
• Title: Non-Abelian dynamical gauge field and topological superfluids in optical Raman lattice
• Authors: Xin-Chi Zhou, Tian-Hua Yang, Zhi-Yuan Wang and Xiong-Jun Liu
• Abstract summary: We propose an experimental scheme to realize non-Abelian dynamical gauge field for ultracold fermions. The dynamical gauge fields arise from nontrivial interplay effect between the strong Zeeman splitting and Hubbard interaction in a two-dimensional (2D) optical Raman lattice. The topological superfluid from a novel pairing driven by 2D dynamical gauge fields is reached, with analytic and numerical results being obtained.
• Score: 12.753165411034624
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We propose an experimental scheme to realize non-Abelian dynamical gauge field for ultracold fermions, which induces a novel pairing mechanism of topological superfluidity. The dynamical gauge fields arise from nontrivial interplay effect between the strong Zeeman splitting and Hubbard interaction in a two-dimensional (2D) optical Raman lattice. The spin-flip transitions are forbidden by the large Zeeman detuning, but are restored when the Zeeman splitting is compensated by Hubbard interaction. This scheme allows to generate a dynamical non-Abelian gauge field that leads to a Dirac type correlated 2D spin-orbit interaction depending on local state configurations. The topological superfluid from a novel pairing driven by 2D dynamical gauge fields is reached, with analytic and numerical results being obtained. Our work may open up a door to emulate non-Abelian dynamical gauge fields and correlated topological phases with experimental feasibility.

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