• DOI:10.1103/PhysRevD.79.105012
• Corpus ID: 119301349

Inhomogeneous Condensates in the Thermodynamics of the Chiral NJL(2) model

@article{Basar2009InhomogeneousCI,
  title={Inhomogeneous Condensates in the Thermodynamics of the Chiral NJL(2) model},
  author={Gokce Basar and Gerald V. Dunne and Michael Thies},
  journal={Physical Review D},
  year={2009},
  volume={79},
  pages={105012}
}

• Gokce Basar, G. Dunne, M. Thies
• Published 10 March 2009
• Physics
• Physical Review D

We analyze the thermodynamical properties, at finite density and nonzero temperature, of the (1+1) dimensional chiral Gross-Neveu model (the NJL{sub 2} model), using the exact inhomogeneous (crystalline) condensate solutions to the gap equation. The continuous chiral symmetry of the model plays a crucial role, and the thermodynamics leads to a broken phase with a periodic spiral condensate, the ''chiral spiral,'' as a thermodynamically preferred limit of the more general ''twisted kink crystal'' solution of the gap equation. This situation should be contrasted with the Gross-Neveu model, which has a discrete chiral symmetry, and for which the phase diagram has a crystalline phase with a periodic kink crystal. We use a combination of analytic, numerical, and Ginzburg-Landau techniques to study various parts of the phase diagram.