Updating the Phase Diagram of the Gross-Neveu Model in 2+1 Dimensions

Abstract

The method of optimized perturbation theory (OPT) is used to study the phase diagram of the massless Gross-Neveu model in 2+1 dimensions. In the temperature and chemical potential plane, our results give strong support to the existence of a tricritical point and line of first order phase transition, previously only suspected to exist from extensive lattice Monte Carlo simulations. In addition of presenting these results we discuss how the OPT can be implemented in conjunction with the Landau expansion in order to determine all the relevant critical quantities.

7 pages, 2 eps figures. Replaced with the version that matches the published one (PLB)

References in corpus (3)

• Emergence of Tricritical Point and Liquid-Gas Phase in the Massless 2+1 Dimensional Gross-Neveu Model
• Asymptotically Improved Convergence of Optimized Perturbation Theory in the Bose-Einstein Condensation Problem
• Critical and Tricritical Points for the Massless 2d Gross-Neveu Model Beyond Large N

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