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arXiv · 1808.05348

Two-leg ladder Bose Hubbard models with staggered fluxes

Rashi Sachdeva·Friederike Metz·Manpreet Singh·Tapan Mishra·Thomas Busch
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Abstract

We investigate the ground state properties of ultracold atoms trapped in a two-leg ladder potential in the presence of an artificial magnetic field in a staggered configuration. We focus on the strongly interacting regime and use the Landau theory of phase transitions and a mean field Gutzwiller variational method to identify the stable superfluid phases and their boundaries with the Mott-insulator regime as a function of magnetic flux. In addition, we calculate the local and chiral currents of these superfluid phases, which show a staggered vortex anti-vortex configuration. The analytical results are confirmed by numerical simulations using a cluster mean-field theory approach.

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Rashi Sachdeva, Friederike Metz, Manpreet Singh, Tapan Mishra, Thomas Busch. 2018-08-16. Two-leg ladder Bose Hubbard models with staggered fluxes. https://doi.org/10.1103/physreva.98.063612

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