Phys. Rev. Lett. 84, 598–601 (2000)Gapless Color SuperconductivityReceived 12 August 1999; published in the issue dated 24 January 2000 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. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.84.598
DOI:
10.1103/PhysRevLett.84.598
PACS:
12.38.Aw, 12.38.Mh, 25.75.-q, 26.60.+c
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