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Universality in fermionic field theories at finite temperature

Costas G. Strouthos
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Abstract

We discuss the critical properties of the three-dimensional NJL model at nonzero temperature. We show that the Z(2)-symmetric model undergoes a second order phase transition with 2d Ising exponents and its critical region is suppressed by a factor 1/N^{-0.5}. We also provide numerical evidence that the U(1)-symmetric model undergoes a BKT transition in accordance with the dimensional reduction scenario.

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Costas G. Strouthos. 2003-01-27. Universality in fermionic field theories at finite temperature. https://doi.org/10.1142/9789812704498_0061

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