Neutral Larkin--Ovchinnikov--Fulde--Ferrell state and chromomagnetic instability in two-flavor dense QCD

Abstract

In two-flavor dense quark matter, we describe the dynamics in the single plane wave Larkin--Ovchinnikov--Fulde--Ferrell (LOFF) state satisfying the color and electric neutrality conditions. We find that because the neutral LOFF state itself suffers from a chromomagnetic instability in the whole region where it coexists with the (gapped/gapless) two-flavor superconducting (2SC/g2SC) phases, it cannot cure this instability in those phases. This is unlike the recently revealed gluonic phase which seems to be able to resolve this problem.

Revtex4, 5 pages, 3 figures, clarifications added, to appear in Phys.Rev.Lett

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• Neutral Color Superconductivity Including Inhomogeneous Phases at Finite Temperature
• Instability of Fulde-Ferrell-Larkin-Ovchinnikov states in three and two dimensions
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• Ginzburg-Landau free energy of crystalline color superconductors: A matrix formalism from solid-state physics
• Complete Gluonic Phase in Two-Flavor Color Superconductivity