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Particle formation and ordering in strongly correlated fermionic systems: Solving a model of quantum chromodynamics.
- Source :
-
Physical Review D: Particles, Fields, Gravitation & Cosmology . 8/15/2016, Vol. 94 Issue 4, p1-1. 1p. - Publication Year :
- 2016
-
Abstract
- In this paper we study a (1+1)-dimensional version of the famous Nambu-Jona-Lasinio model of quantum chromodynamics (QCD2) both at zero and at finite baryon density. We use nonperturbative techniques (non-Abelian bosonization and the truncated conformal spectrum approach). When the baryon chemical potential, μ, is zero, we describe the formation of fermion three-quark (nucleons and Δ baryons) and boson (two-quark mesons, six-quark deuterons) bound states. We also study at μ=0 the formation of a topologically nontrivial phase. When the chemical potential exceeds the critical value and a finite baryon density appears, the model has a rich phase diagram which includes phases with a density wave and superfluid quasi-long-range (QLR) order, as well as a phase of a baryon Tomonaga-Luttinger liquid (strange metal). The QLR order results in either a condensation of scalar mesons (the density wave) or six-quark bound states (deuterons). [ABSTRACT FROM AUTHOR]
- Subjects :
- *NAMBU-Jona-Lasinio model
*QUANTUM chromodynamics
*BARYONS
Subjects
Details
- Language :
- English
- ISSN :
- 24700010
- Volume :
- 94
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Physical Review D: Particles, Fields, Gravitation & Cosmology
- Publication Type :
- Periodical
- Accession number :
- 119250586
- Full Text :
- https://doi.org/10.1103/PhysRevD.94.045003