Phase diagram of semi-hard-core bosons on a square lattice

Abstract

Phase diagrams of charged semi-hard-core bosons are studied in the mean field approximation. An increase in the parameter of local correlations is shown to lead to the transformation of the phase diagram of the system from the form characteristic of hard-core bosons to the limiting form with a parabolic dependence of the critical temperature of charge ordering on the boson concentration. The evolution between these limiting cases is dependent on the ratio between the model parameters and is accompanied by various effects, such as the change in the phase transition type, the appearance of new order-order transition, and the appearance of new critical points.

arXiv comment10 pages, 3 pdf figures

References in corpus (9)

• Measuring entanglement entropy through the interference of quantum many-body twins
• Repulsively bound atom pairs in an optical lattice
• Non-standard Hubbard models in optical lattices: a review
• SO(5) Theory of Antiferromagnetism and Superconductivity
• Algebraic Approach to Interacting Quantum Systems
• Dipolar Molecules in Optical Lattices
• Critical temperatures of a model cuprate
• The MFA ground states for the extended Bose-Hubbard model with a three-body constraint
• Pair hopping in systems of strongly interacting hard-core bosons