Multi-winding flux tubes in CFL quark matter

Schmitt, A. and Haber, A. (2019) Multi-winding flux tubes in CFL quark matter. In Proceedings of Science: XIII Quark Confinement and the Hadron Spectrum. vol. 336, Proceedings of Science. 13 pp . (doi:10.22323/1.336.0213).

Record type: Conference or Workshop Item (Paper)

Abstract

Color-flavor locked quark matter can be described as a three-component superconductor and thus shows unconventional behavior in the transition regime from type-I to type-II superconductivity. We discuss this behavior by studying magnetic line defects in a Ginzburg-Landau approach, taking into account all possible values of the three winding numbers.

After a brief discussion of the defects that include baryon circulation we focus on pure magnetic flux tubes. We show that at strong coupling, relevant for neutron stars, type-II behavior is conceivable and the most preferred configuration has minimal total winding. Only at weak coupling we find a regime where multi-winding flux tubes are preferred, although this regime most likely requires an unrealistically large superconducting gap.

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