We propose a wide universality class of gapless superfluids, and analyze a limit that might be realized in quark matter at intermediate densities. In the breached pairing color superconducting phase heavy [Formula presented] quarks, with a small Fermi surface, pair with light [Formula presented] or [Formula presented] quarks. The ground state has a superfluid and a normal Fermi component simultaneously. We expect a second-order phase transition, as a function of increasing density, from the breached pairing phase to the conventional color-flavor locked phase.
ASJC Scopus subject areas
- Physics and Astronomy(all)