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Color superconductivity in finite systems

Paolo Amore, Michael C. Birse, Judith A. McGovern, Niels R. Walet

DOI 10.1103/PhysRevD.65.074005 · Physical Review D

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Abstract

In this paper we study the effect of finite size on the two-flavor color superconducting state. As well as restricting the quarks to a box, we project onto states of good baryon number and onto color singlets, these being necessary restrictions on any observable “quark nuggets.” We find that whereas finite size alone has a significant effect for very small boxes, with the superconducting state often being destroyed, the effect of projection is to restore it again. The infinite-volume limit is a good approximation even for quite small systems.

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