2006/03/31 by Kei Iida, Kenji Fukushima
Earth and Planetary Sciences · Physics and Astronomy · #Amplitude #Cold Atom Physics and Bose-Einstein Condensates #Color superconductivity #Condensed matter physics #Cooper pair #Gapless playback #High-pressure geophysics and materials #Homogeneous #Instability #Phase (matter) #Physics #Quantum electrodynamics #Quantum mechanics #Quantum, superfluid, helium dynamics #Quark #Statistical physics #Strange matter #Superconductivity #Superfluidity #hep-ph
paper · pdf · doi:10.1103/physrevd.74.074020
published as Phys.Rev. D74 (2006) 074020 · 15 pages, 3 figures; corrected Eq. (36) and changed content associated with d quark clustering instability
arxiv created 2006/06/06 · openalex publication_date 2006/10/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We systematically apply density functional theory to determine the kind of inhomogeneities that spontaneously develop in a homogeneous gapless phase of neutral two-flavor superfluid quark matter. We consider inhomogeneities in the quark and electron densities and in the phases and amplitude of the order parameter. These inhomogeneities are expected to lead the gapless phase to a BCS-normal coexisting phase, a Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) state with phase oscillations alone, and a LOFF state with amplitude oscillations. Using a simple model for the energy density functional, we find that which of them the homogeneous system tends towards depends sensitively on the chemical potential separation between up and down quarks and the gradient energies.