Effect of Local Correlations on Phase States in a Model of Semi-Hard-Core Bosons on a Square Lattice

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发表日期：

2024年9月1日

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V. A. Ulitko,
V. V. Konev,
A. A. Chikov,
Yu. D. Panov

摘要

Abstract

The authors consider a model of charged semi-hard-core bosons on a square lattice with possible occupation number \({{n}_{i}} = 0,1,2~\) at each site. Temperature phase diagrams of the model are obtained using quantum Monte Carlo calculations, and the effect of local charge correlations is studied. It is shown that local charge correlations increase the role of quantum fluctuations in the formation of phase states.