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Article Dans Une Revue International Journal of Modern Physics E Année : 2007

Phase Diagram of the Three Dimensional Four Fermi Model with Finite N Corrections

Résumé

We study the phase diagram of the 3d massless Gross–Neveu model with different numbers of fermionic species, N. Using the Optimized Perturbation Theory technique, the free energy is evaluated at finite temperature and chemical potential. The analytical results allow us to calculate critical quantities for any value of N and, in the present work, we choose de values N = 1,3,4,10. In addition, we determine the evolution of the tricritical points, in the temperature versus chemical potential plane for these different values of N.
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Dates et versions

hal-00394236 , version 1 (11-06-2009)

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Jean-Loïc Kneur, Marcus Pinto, Rudnei O. Ramos, Ederson Staudt. Phase Diagram of the Three Dimensional Four Fermi Model with Finite N Corrections. International Journal of Modern Physics E, 2007, 16 (9), pp.2802 - 2805. ⟨10.1142/S0218301307008446⟩. ⟨hal-00394236⟩
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