The influence of local correlations on the phase states in the model of semi-hard-core bosons on a square lattice

V. A. Ulitko; V. V. Konev; A. A. Chikov; Y. D. Panov

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arXiv · 2311.16455

The influence of local correlations on the phase states in the model of semi-hard-core bosons on a square lattice

V. A. Ulitko·V. V. Konev·A. A. Chikov·Y. D. Panov

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Abstract

The work considers a model of charged "semi-hard-core" bosons on a square lattice with a possible filling number at each node, ranging from 0 to 2. Temperature phase diagrams of the model are obtained using numerical Monte Carlo quantum simulation methods, and the influence of local charge correlations is examined. Comparison with results from mean-field methods shows that local charge correlations contribute to an increased role of quantum fluctuations in the formation of phase states.

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V. A. Ulitko, V. V. Konev, A. A. Chikov, Y. D. Panov. 2023-11-28. The influence of local correlations on the phase states in the model of semi-hard-core bosons on a square lattice. https://arxiv.org/abs/2311.16455

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