paper

Finite-size effects on the phase diagram of difermion condensates in two-dimensional four-fermion interaction models

arXiv:1102.1860 · doi:10.1103/PhysRevD.83.025001

Abstract

We investigate finite-size effects on the phase structure of chiral and difermion condensates at finite temperature and density in the framework of the two-dimensional large- Nambu-Jona-Lasinio model. We take into account size-dependent effects by making use of -function and compactification methods. The thermodynamic potential and the gap equations for the chiral and difermion condensed phases are then derived in the mean-field approximation. Size-dependent critical lines separating the different phases are obtained considering anti-periodic boundary conditions for the spatial coordinate.

Revtex, 8 pages, 8 figures

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