Abstract
We study a “hard-core” model on a Cayley tree. In the case of a normal divisor of index 4, we show the uniqueness of weakly periodic Gibbs measures under certain conditions on the parameters. Moreover, we prove that there exist weakly periodic (nonperiodic) Gibbs measures different from those previously known.
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Khakimov, R.M., Makhammadaliev, M.T. Uniqueness and nonuniqueness conditions for weakly periodic Gibbs measures for the hard-core model. Theor Math Phys 204, 1059–1078 (2020). https://doi.org/10.1134/S0040577920080073
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DOI: https://doi.org/10.1134/S0040577920080073