title: Exact solution of a repulsive fermi model with enhanced superconducting correlations
abstract: We present the exact solution of a model of interacting fermions in any dimension with a pure repulsive interaction projecting out a given Cooper channel. The solution rests upon the infinite ranged character of the interaction in real space, leading to a functional integral that is dominated by a Gaussian term. The solution produces strong superconducting enhancements and quasi-long-ranged order in a channel that is not present in the Hamiltonian explicitly, but of the form given by arguments from order by projection.
authors.affiliation: Department of Physics, Indian Institute of Science, Bangalore 560012, India.
authors.initials: HR
authors.lastname: Krishnamurthy
authors.initials: BS
authors.lastname: Shastry