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The three-dimensional, three state Potts model in a negative external field

Bonati, Claudio and D'Elia, Massimo (2010) The three-dimensional, three state Potts model in a negative external field. Physical review. D, Particles, fields, gravitation, and cosmology, 82 . p. 114515. ISSN 1550-7998

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We investigate the critical behaviour of the three-dimensional, three state Potts model in presence of a negative external field h, i.e. disfavouring one of the three states. A genuine phase transition is present for all values of |h|, corresponding to the spontaneous breaking of a residual Z_2 symmetry. The transition is first/second order respectively for small/large values of |h|, with a tricritical field h_tric separating the two regimes. We provide, using different and consistent approaches, a precise determination of h_tric; we also compare with previous studies and discuss the relevance of our investigation to analogous studies of the QCD phase diagram in presence of an imaginary chemical potential.

Item Type: Article
Additional Information: Imported from arXiv
Depositing User: dott.ssa Sandra Faita
Date Deposited: 29 Jan 2014 18:08
Last Modified: 29 Jan 2014 18:08
URI: http://eprints.adm.unipi.it/id/eprint/1493

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