Duality between chiral symmetry breaking and charged pion condensation at large $N_c$: Consideration of an NJL${}_2$ model with baryon-, isospin- and chiral isospin chemical potentials

D. Ebert, T. G. Khunjua, K. G. Klimenko

In this paper we investigate the phase structure of a (1+1)-dimensional schematic quark model with four-quark interaction and in the presence of baryon (${\mu }_B$), isospin (${\mu }_I$) and…