Superfluid-Mott insulator transition in spin-orbit coupled Bose-Hubbard Model

A. T. Bolukbasi; M. Iskin

doi:10.1103/physreva.89.043603

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arXiv · 1401.0527

Superfluid-Mott insulator transition in spin-orbit coupled Bose-Hubbard Model

A. T. Bolukbasi·M. Iskin

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Abstract

We consider a square optical lattice in two dimensions and study the effects of both the strength and symmetry of spin-orbit-coupling (SOC) and Zeeman field on the ground-state, i.e., Mott insulator (MI) and superfluid (SF), phases and phase diagram, i.e., MI-SF phase transition boundary, of the two-component Bose-Hubbard model. In particular, based on a variational Gutzwiller ansatz, our numerical calculations show that the spin-orbit coupled SF phase is a nonuniform (twisted) one with its phase (but not the magnitude) of the order parameter modulating from site to site. Fully analytical insights into the numerical results are also given.

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BibTeX RIS

A. T. Bolukbasi, M. Iskin. 2014-01-02. Superfluid-Mott insulator transition in spin-orbit coupled Bose-Hubbard Model. https://doi.org/10.1103/physreva.89.043603

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