Stable gapless superconductivity at strong coupling

2006/02/07 by Masakiyo Kitazawa, Dirk H. Rischke, I. A. Shovkovy +1 · 3 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Coupling (piping) #Gapless playback #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics #Superconductivity #cond-mat.supr-con #hep-ph #nucl-th

paper · pdf · doi:10.1016/j.physletb.2006.04.054

published as Phys.Lett. B637 (2006) 367-373 · 8 pages, 4 figures

arxiv created 2006/02/07 · openalex publication_date 2006/05/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We study cross-flavor Cooper pairing in a relativistic system of two fermion species with mismatched Fermi surfaces. We find that there exist gapless phases which are characterized by either one or two gapless nodes in the energy spectra of their quasiparticles. An analysis of the current-current correlator reveals that, at strong coupling, both of these gapless phases can be free of magnetic instabilities and thus are stable. This is in contrast to the weak-coupling case where there are always two gapless nodes and the phase becomes magnetically unstable.

Citations

• Fluctuations of the color-superconducting gap in hot and dense quark matter
• The Meissner effect in a two flavor LOFF color superconductor
• Observation of resonance condensation of fermionic atom pairs
• Chromomagnetic instability in dense quark matter
• Breached Pairing Superfluidity: Possible Realization in QCD
• Stability Criteria for Breached-Pair Superfluidity
• QCD at finite baryon density: nucleon droplets and color superconductivity
• Stressed pairing in conventional color superconductors is unavoidable
• Analytical and numerical evaluation of the Debye and Meissner masses in dense neutral three-flavor quark matter
• Phase diagram of neutral quark matter: Self-consistent treatment of quark masses
• Precursor of color superconductivity in hot quark matter

Cited by

• Relativistic BCS–BEC crossover of a two-species Fermi gas with number density asymmetry at zero temperature
• Neutral color superconductivity including inhomogeneous phases at finite temperature
• Combined chiral and diquark fluctuations along QCD critical line and enhanced baryon production with parity doubling