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The 2d gross-neveu model at finite temperature and density with finite N corrections

We use the linear delta expansion, or optimized perturbation theory, to evaluate the effective potential for the two dimensional Gross-Neveu model at finite temperature and density obtaining analytical equations for the critical temperature, chemical potential and fermionic mass which include finite N corrections. Our results seem to improve over the traditional large-N predictions.

Non perturbative methods; Gross-Neveu model; Finite temperature; Finite density


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