Gapless color superconductivity
نویسندگان
چکیده
We present the dispersion relations for quasiparticle excitations about the color-flavor locked ground state of QCD at high baryon density. In the presence of condensates which pair light and strange quarks there need not be an energy gap in the quasiparticle spectrum. This raises the possibility of gapless color superconductivity, with a Meissner effect but no minimum excitation energy. Analysis within a toy model suggests that gapless color superconductivity may occur only as a metastable phase.
منابع مشابه
Unconventional Color Superconductor
Superfluidity or superconductivity with mismatched Fermi momenta appears in many systems such as charge neutral dense quark matter, asymmetric nuclear matter, and in imbalanced cold atomic gases. The mismatch plays the role of breaking the Cooper pairing, and the pair-breaking state cannot be properly described in the framework of standard BCS theory. I give a brief review on recent theoretical...
متن کاملGapless phases of color-superconducting matter
We discuss gapless color superconductivity for neutral quark matter in β equilibrium at zero as well as at nonzero temperature. Basic properties of gapless superconductors are reviewed. The current progress and the remaining problems in the understanding of the phase diagram of strange quark matter are discussed. PACS numbers: 12.38.-t, 12.38.Aw, 12.38.Mh, 26.60.+c Submitted to: J. Phys. G: Nuc...
متن کاملGapless color superconductivity at zero and at finite temperature
We present a detailed study of the recently proposed gapless color superconductivity in neutral two-flavor quark matter in β-equilibrium at zero as well as at finite temperature. We clarify the nature of the fermionic quasiparticles, and discuss the physical properties of this gapless phase of quark matter. The appearance of two “secondary” spin-1 condensates in the gapless ground state is poin...
متن کاملColor Superconductivity in Dense Quark Matter
A brief introduction into the properties of dense quark matter is given. Recently proposed gapless color superconducting phases of neutral and betaequilibrated dense quark matter are discussed. The current status in the field is described, and the promising directions of the future research are outlined.
متن کاملEffective theory of color superconductivity
We briefly review an effective theory of QCD at high baryon density, describing the relevant modes near the Fermi surface. The high density effective theory has properties of reparametrization invariance and gauge invariance, maintained in a subtle way. It also has a positive measure, allowing lattice simulations at high baryon density. We then apply it to gapless superconductors and discuss re...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review letters
دوره 84 4 شماره
صفحات -
تاریخ انتشار 2000