Dense Quark Matter in Nature

Abstract

According to quantum chromodynamics (QCD), matter at ultra-high densities will take the form of a color-superconducting quark liquid, in which there is a condensate of Cooper pairs of quarks near the Fermi surface. I present a review of the physics of color superconductivity. I give particular attention to the recently proposed gapless CFL (gCFL) phase, which has unusual properties such as quasiquarks with a near-quadratic dispersion relation, and which may well be the favored phase of quark matter in the density range relevant to compact stars. I also discuss the effects of color superconductivity on the mass-radius relationship of compact stars, showing that one would have to fix the bag constant by other measurements in order to see the effects of color superconductivity. An additional parameter in the quark matter equation of state connected with perturbative corrections allows quark matter to imitate nuclear matter over the relevant density range, so that hybrid stars can show a mass-radius relationship very similar to that of nuclear matter, and their masses can reach 1.9 M_solar.

16 pages, LaTeX, for proceedings of "Finite Density QCD at Nara"

References in corpus (1)

• Gapless color superconductivity at zero and at finite temperature

Cited by in corpus (48)

• WIMP Annihilation and Cooling of Neutron Stars
• The physics of dense hadronic matter and compact stars
• Extensive study of phase diagram for charge neutral homogeneous quark matter affected by dynamical chiral condensation -- unified picture for thermal unpairing transitions from weak to strong coupling --
• The Crystallography of Three-Flavor Quark Matter
• The Stability of Strange Star Crusts and Strangelets
• Analytical and numerical evaluation of the Debye and Meissner masses in dense neutral three-flavor quark matter
• The rigidity of crystalline color superconducting quark matter
• A Hot Water Bottle for Aging Neutron Stars
• Equilibrium sequences of non rotating and rapidly rotating crystalline color superconducting hybrid stars
• Heating (Gapless) Color-Flavor Locked Quark Matter
• BCS/BEC crossover in Quark Matter and Evolution of its Static and Dynamic properties
• Color-flavor locked quark stars in energy-momentum squared gravity
• Testing the Ginzburg-Landau approximation for three-flavor crystalline color superconductivity
• Compact Stars for Undergraduates
• Can stellar mass black holes be quark stars?
• Oscillations of General Relativistic Multi-fluid/Multi-layer Compact Stars
• Direct Urca neutrino rate in colour superconducting quark matter
• Strange Quark Stars in 4D Einstein-Gauss-Bonnet Gravity
• Neutrino emission from compact stars and inhomogeneous color superconductivity
• Bulk viscosity in 2SC quark matter
• Relativistic BCS-BEC crossover in a boson-fermion model
• Massive Compact Stars as Quark Stars
• Phase-diagram of two-color lattice QCD in the chiral limit
• Pair condensation and bound states in fermionic systems
• The phases of isospin asymmetric matter in the two flavor NJL model
• Stressed pairing in conventional color superconductors is unavoidable
• Transport theory for cold relativistic superfluids from an analogue model of gravity
• Critical temperature for kaon condensation in color-flavor locked quark matter
• Interplay between kaon condensation and hyperons in highly dense matter
• Modelling a $2.5M_{\odot }$ Compact Star with Quark Matter
• Stable configurations of hybrid stars with colour-flavour-locked core
• Electrodynamics at non-zero temperature, chemical potential, and Bose condensate
• Collective modes in the color flavor locked phase
• Influence of finite quark chemical potentials on the three flavor LOFF phase of QCD
• Collective excitations in a superfluid of color-flavor locked quark matter
• The Gribov problem in presence of background field for $SU(2)$ Yang-Mills theory
• Lattice QCD at Finite Temperature and Density
• Compact stars in the Einstein dark energy model
• Color-flavor locked strangelets in a quark mass density-dependent model
• Wormhole geometries supported by quark matter at ultra-high densities
• Effective meson masses, effective meson-nucleon couplings and neutron star radii
• Density dependence of quark masses and stability of color-flavor locked phases
• Bose-Einstein condensation in strong-coupling quark color superconductor near flavor SU(3) limit
• Competition of Color Ferromagnetic and Superconductive States in a Quark-Gluon System
• Neutrino radiation from dense matter
• Formation of Gapless Phases of $K^0$ Condensed Color-Flavor Locked Superconducting Quark Matter
• Effects of density-dependent quark mass on phase diagram of three-flavor quark matter
• Inhomogeneous color superconductivity and the cooling of compact stars