Spatial inversion symmetry breaking of vortex current in biased-ladder superfluid

• URL: http://arxiv.org/abs/2307.15889v1
• Date: Sat, 29 Jul 2023 05:20:59 GMT
• Title: Spatial inversion symmetry breaking of vortex current in biased-ladder superfluid
• Authors: Weijie Huang and Yao Yao
• Abstract summary: We investigate the dynamics of interacting bosons on a two-leg ladder in presence of a uniform Abelian gauge field. The model hosts a variety of emergent quantum phases, and we focus on the superfluid biased-ladder phase breaking the $Z_2$ symmetry of two legs.
• Score: 5.128355665808276
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We investigate the quench dynamics of interacting bosons on a two-leg ladder in presence of a uniform Abelian gauge field. The model hosts a variety of emergent quantum phases, and we focus on the superfluid biased-ladder phase breaking the $Z_{2}$ symmetry of two legs. We observe an asymmetric spreading of vortex current and particle density, i.e., the current behaves particle-like on the right and wave-like on the left, indicating spontaneous breaking of the spatial inversion symmetry. By decreasing the repulsion strength, it is found the particle-like current is more robust than the wave-like one. The evolution of entanglement entropy manifests logarithmic growth with time suggesting many-body localization matters.

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