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EPL Association, European Physical Society Letters, 3(81), p. 30008, 2008

DOI: 10.1209/0295-5075/81/30008

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A study of logarithmic corrections and universal amplitude ratios in the two-dimensional 4-state Potts model

Journal article published in 2008 by L. N. Shchur, Bertrand Berche ORCID, Paolo Butera
This paper is available in a repository.
This paper is available in a repository.

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Abstract

Monte Carlo (MC) and series expansion (SE) data for the energy, specific heat, magnetization and susceptibility of the two-dimensional 4-state Potts model in the vicinity of the critical point are analysed. The role of logarithmic corrections is discussed and an approach is proposed in order to account numerically for these corrections in the determination of critical amplitudes. Accurate estimates of universal amplitude ratios A+/A-, Γ+/Γ-, ΓT/Γ- and RC± are given, which arouse new questions with respect to previous works.