Superfluidity in a Model of Massless Fermions Coupled to Scalar Bosons

Details Superfluidity in a Model of Massless Fermions Coupled to Scalar Bosons Superfluidity in a Model of Massless Fermions Coupled to Scalar Bosons

1999-03-09

arxiv.org/abs/nucl-th/9903023v2

Phys.Rev. D60 (1999) 094013

Physics

Nuclear Physics

Nuclear Theory

26 pages, 9 figures, RevTeX, epsf and psfig style files required. Revised version, discussion of the excitation spectrum exten

Scientific paper

10.1103/PhysRevD.60.094013

We study superfluidity in a model of massless fermions coupled to a massive scalar field through a Yukawa interaction. Gap equations for a condensate with total spin J=0 are solved in the mean-field approximation. For the Yukawa interaction, the gaps for right- and left-handed fermions are equal in magnitude and opposite in sign, so that condensation occurs in the J^P = 0^+ channel. At finite scalar mass, there are two different gaps for fermions of a given chirality, corresponding to condensation of particle pairs or of antiparticle pairs. These gaps become degenerate in the limit of infinite scalar mass.

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