Continuity from neutron matter to two-flavor quark matter with ${}^1{S}_0$ and ${}^3{P}_2$ superfluidity

Abstract

This study is performed with the aim of gaining insights into the possible applicability of the quark-hadron continuity concept, not only in the idealized case of three-flavor symmetric quark matter, but also for the transition from neutron matter to two-flavor quark matter. A key issue is the continuity between neutron superfluidity and a corresponding superfluid quark phase produced by $d$-quark pairing. Symmetry arguments are developed and relevant dynamical mechanisms are analyzed. It is pointed out that the ${}^3{P}_2$ superfluidity in dense neutron matter has a direct analogue in the ${}^3{P}_2$ pairing of $d$-quarks in two-flavor quark matter. This observation supports the idea that the quark-hadron continuity hypothesis may be valid for such systems. Possible implications for neutron stars are briefly discussed.

14 pages, 5 figures; minor updates to promote correctness in discussions

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Cited by in corpus (20)

• 50 Years of Quantum Chromodynamics
• Quark-nuclear hybrid equation of state for neutron stars under modern observational constraints
• Gravitational Wave Signal for Quark Matter with Realistic Phase Transition
• Extensive Studies of the Neutron Star Equation of State from the Deep Learning Inference with the Observational Data Augmentation
• Excluded-volume model for quarkyonic matter II: Three-flavor shell-like distribution of baryons in phase space
• Phenomenological QCD equations of state for neutron star dynamics: Nuclear-2SC continuity and evolving effective couplings
• Non-Abelian Alice strings in two-flavor dense QCD
• Topological confinement of vortices in two-flavor dense QCD
• Chiral non-Abelian vortices and their confinement in three flavor dense QCD
• Equation of state of neutron star matter and its warm extension with an interacting hadron resonance gas
• Signature of hadron-quark crossover in binary-neutron-star mergers
• Core structures of vortices in Ginzburg-Landau theory for neutron ${}^3{P}_2$ superfluids
• Proximity effects of vortices in neutron ${}^3{P}_2$ superfluids in neutron stars: Vortex core transitions and covalent bonding of vortex molecules
• Alice meets Boojums in neutron stars: vortices penetrating two-flavor quark-hadron continuity
• Continuity from neutron matter to color-superconducting quark matter with ${}^3{P}_2$ superfluidity
• Observational Probes of the Neutron Star Equation of State with Hyperons, Bosonic Dark Matter, and Quark Matter
• Anatomy of the dense QCD matter from canonical sectors
• BCS-BCS crossover between atomic and molecular superfluids in a Bose-Fermi mixture
• Probing Strange Dark Matter through $f$-mode Oscillations of Neutron Stars with Hyperons and Quark Matter
• Renormalization-group approach to the Kohn-Luttinger superconductivity: Amplification of the pairing gap from ${\ell }^4$ to $\ell$