Phase diagram of chiral quark matter: color and electrically neutral Fulde-Ferrell phase

Abstract

The phase diagram of charge and color neutral two-flavor color superconducting quark matter is studied including the homogeneous two-flavor superconductor (2SC) and the inhomogeneous Fulde-Ferrell (FF) phases within the Nambu-Jona-Lasinio model. The low-temperature domain T < 5 MeV of the phase diagram contains the FF phase, which borders at high temperatures to the 2SC phase. The critical temperature of phase transition from the 2SC to the unpaired state is in the range 20-30 MeV. We derive the equation of state of matter and its composition and show that matter in mature compact stars should be in the inhomogeneous FF-like superconducting state. We briefly discuss the astrophysical implications of such a phase in compact stars.

v2: typos corrected, 8 pages, 1 figure; v3: minor corrections, matches published version

References in corpus (12)

• Color superconductivity in dense quark matter
• Pulsars as Astrophysical Laboratories for Nuclear and Particle Physics
• The Crystallography of Three-Flavor Quark Matter
• Equilibrium sequences of non rotating and rapidly rotating crystalline color superconducting hybrid stars
• Testing the Ginzburg-Landau approximation for three-flavor crystalline color superconductivity
• Neutrino emission from compact stars and inhomogeneous color superconductivity
• Characterizing the Larkin-Ovchinnikov-Fulde-Ferrel phase induced by the chromomagnetic instability
• Gravitational radiation from crystalline color-superconducting hybrid stars
• Phase diagram of chiral quark matter: Fulde-Ferrell pairing from weak to strong coupling
• Gluonic phase versus LOFF phase in two-flavor quark matter
• The Crystallography of Strange Quark Matter
• Neutrino Emission From Inhomogeneous Pion Condensed Quark Matter