paper

Strong-weak coupling self-duality in the two-dimensional quantum phase transition of superconducting arrays

arXiv:cond-mat/0312587 · doi:10.1103/PhysRevLett.93.047003

Abstract

The 2D quantum phase transition that occurs in a square lattice of superconductors is used to show how four-body interactions in reproduce nonperturbative effects familiar from the study of two-body interactions in . This model can be analyzed using an exact lattice self-duality of the associated 3D classical model; this duality is the 3D generalization of the Kramers-Wannier duality of the 2D Ising model, and there are similar exact dualities for certain many-spin interactions in dimensions . We also discuss the excitation spectrum in the ordered and disordered phases, and the relationship between our model and previously studied metallic behavior of boson models with four-boson interactions.

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