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arXiv · 2004.06400

Segregated quantum phases of dipolar bosonic mixtures in two-dimensional optical lattices

Rukmani Bai·Deepak Gaur·Hrushikesh Sable·Soumik Bandyopadhyay·K. Suthar·D. Angom
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Abstract

We identify the quantum phases in a binary mixture of dipolar bosons in two-dimensional optical lattices. Our study is motivated by the recent experimental realization of binary dipolar condensate mixtures of Er-Dy [Phys. Rev. Lett. 121, 213601 (2018)]. We model the system by using the extended two-species Bose-Hubbard model and calculate the ground-state phase diagrams by using mean-field theory. For selected cases we also obtain analytical phase boundaries by using the site-decoupled mean-field theory. For comparison we also examine the phase diagram of two-species Bose-Hubbard model. Our results show that the quantum phases with the long-range intraspecies interaction phase separate with no phase ordering. The introduction of the long-range interspecies interaction modifies the quantum phases of the system. It leads to the emergence of phase-separated quantum phases with phase ordering. The transition from the phase-separated quantum phases without phase ordering to phase ordered ones breaks the inversion symmetry.

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Rukmani Bai, Deepak Gaur, Hrushikesh Sable, Soumik Bandyopadhyay, K. Suthar, D. Angom. 2020-04-14. Segregated quantum phases of dipolar bosonic mixtures in two-dimensional optical lattices. https://doi.org/10.1103/physreva.102.043309

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