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

Weijie Huang; Yao Yao

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arXiv · 2307.15889

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

Weijie Huang·Yao Yao

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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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Weijie Huang, Yao Yao. 2023-07-29. Spatial inversion symmetry breaking of vortex current in biased-ladder superfluid. https://arxiv.org/abs/2307.15889

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