Tricritical curve of massive chiral Gross-Neveu model with isospin

Abstract

We reconsider the two-flavor version of the massive, chiral Gross-Neveu model in 1+1 dimensions. Its phase diagram as a function of baryon chemical potential, isospin chemical potential and temperature has previously been explored. We recapitulate the results, adding the missing tricritical curves. They can be determined exactly by extending the standard stability analysis, using fourth order almost degenerate perturbation theory. Results for three different bare masses are presented and discussed.

9 pages, 16 figures

References in corpus (5)

• Phase structure of the massive chiral Gross-Neveu model from Hartree-Fock
• Inhomogeneous charged pion condensation in chiral asymmetric dense quark matter in the framework of NJL${}_2$ model
• Phase structure of the 1+1 dimensional Nambu--Jona-Lasinio model with isospin
• Baryons in the large N limit of the massive two-dimensional Nambu-Jona-Lasinio model
• First-order phase boundaries of the massive 1+1 dimensional Nambu--Jona-Lasinio model with isospin

Cited by in corpus (3)

• Absence of inhomogeneous chiral phases in 2+1-dimensional four-fermion and Yukawa models
• Stability of homogeneous chiral phases against inhomogeneous perturbations in 2+1 dimensions
• Revisiting the spatially inhomogeneous condensates in the $(1+1)$-dimensional chiral Gross-Neveu model via the bosonic two-point function in the infinite-$N$ limit