Phase Structure of 2-Flavor Quark Matter: Heterogeneous Superconductors

Details Phase Structure of 2-Flavor Quark Matter: Heterogeneous Superconductors Phase Structure of 2-Flavor Quark Matter: Heterogeneous Superconductors

2004-05-19

arxiv.org/abs/nucl-th/0405054v3

Phys.Rev. C71 (2005) 025201

Physics

Nuclear Physics

Nuclear Theory

11 pages, 4 figures. Major Revisions. Includes a detailed discussion of the kinetic terms of the effective theory, instabiliti

Scientific paper

10.1103/PhysRevC.71.025201

We analyze the free energy of charge and color neutral 2-flavor quark matter within the BCS approximation. We consider both the homogeneous gapless superconducting phase and the heterogeneous mixed phase where normal and BCS superconducting phases coexist. We calculate the surface tension between normal and superconducting phases and use it to compare the free energies of the gapless and mixed phases. Our calculation, which retains only the leading order gradient contribution to the free energy, indicates that the mixed phase is energetically favored over an interesting range of densities of relevance to 2 flavor quark matter in neutron stars.

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