Thermodynamic vs. topological phase transitions: Cusp in the Kertesz line

Blanchard P, Gandolfo D, Ruiz J, Wouts M (2008)
EPL 82(5).

Journal Article | Published | English

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We present a study of phase transitions of the mean-field Potts model at (inverse) temperature beta, in the presence of an external field h. Both thermodynamic and topological aspects of these transitions are considered. For the first aspect we complement previous results and give an explicit equation of the thermodynamic transition line in the beta-h plane as well as the magnitude of the jump of the magnetization (for q >= 3). The signature of the latter aspect is characterized here by the presence or not of a giant component in the clusters of a Fortuin-Kasteleyn type representation of the model. We give the equation of the Kertesz line separating (in the beta-h plane) the two behaviours. As a result, we get that this line exhibits, as soon as q >= 3, a very interesting cusp where it separates from the thermodynamic transition line. Copyright (c) EPLA, 2008.
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Blanchard P, Gandolfo D, Ruiz J, Wouts M. Thermodynamic vs. topological phase transitions: Cusp in the Kertesz line. EPL. 2008;82(5).
Blanchard, P., Gandolfo, D., Ruiz, J., & Wouts, M. (2008). Thermodynamic vs. topological phase transitions: Cusp in the Kertesz line. EPL, 82(5).
Blanchard, P., Gandolfo, D., Ruiz, J., and Wouts, M. (2008). Thermodynamic vs. topological phase transitions: Cusp in the Kertesz line. EPL 82.
Blanchard, P., et al., 2008. Thermodynamic vs. topological phase transitions: Cusp in the Kertesz line. EPL, 82(5).
P. Blanchard, et al., “Thermodynamic vs. topological phase transitions: Cusp in the Kertesz line”, EPL, vol. 82, 2008.
Blanchard, P., Gandolfo, D., Ruiz, J., Wouts, M.: Thermodynamic vs. topological phase transitions: Cusp in the Kertesz line. EPL. 82, (2008).
Blanchard, Philippe, Gandolfo, D., Ruiz, J., and Wouts, M. “Thermodynamic vs. topological phase transitions: Cusp in the Kertesz line”. EPL 82.5 (2008).
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