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arXiv · 1510.04449

Finite temperature superfluid transition of strongly-correlated lattice bosons in various geometries

T. A. Zaleski·T. K. Kopec
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Abstract

We study finite-temperature properties of the strongly interacting bosons in three-dimensional lattices by employing the combined Bogoliubov method and the quantum rotor approach. Based on the mapping of the Bose-Hubbard Hamiltonian of strongly interacting bosons onto U(1) phase action, we study their thermodynamic phase diagrams for several lattice geometries including; simple cubic, body- as well as face-centered lattices. The quantitative values for the phase boundaries obtained here may be used as a reference for emulation of the Bose-Hubbard model on a variety of optical lattice structures in order to demonstrate experimental-theoretical consistency for the numerical values regarding the location of the critical points.

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T. A. Zaleski, T. K. Kopec. 2015-10-15. Finite temperature superfluid transition of strongly-correlated lattice bosons in various geometries. https://doi.org/10.1016/j.physb.2014.09.009

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