2005/04/30 by Mei Huang · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #cond-mat.supr-con #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.73.045007
published as Phys.Rev.D73:045007,2006 · 8 pages, no figure, final version to appear in PRD
arxiv created 2006/01/26 · openalex publication_date 2006/02/08 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
It is found that, except chromomagnetic instability, the gapless 2SC phase also exhibits a paramagnetic response to the perturbation of an external color neutral baryon current. The spontaneously generated baryon current driven by the mismatch is equivalent to the one-plane wave Larkin-Ovchinnikov-Fudde-Ferrell (LOFF) state. We describe the 2SC phase in the nonlinear realization framework, and show that each instability indicates the spontaneous generation of the corresponding pseudo-Nambu-Goldstone current. We show this Nambu-Goldstone currents generation state covers the gluon phase as well as the one-plane wave LOFF state. We further point out that, when the charge neutrality condition is required, there exists a narrow unstable LOFF (Us-LOFF) window, where not only off-diagonal gluons but the diagonal 8th gluon cannot avoid the magnetic instability. We discuss that the diagonal magnetic instability in this Us-LOFF window cannot be cured by an off-diagonal gluon condensate in the color superconducting phase, and it will also show up in some constrained Abelian asymmetric superfluid/superconducting systems.