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Exact solution of a one-dimensional fermion model with interchain tunneling

R. Z. Bariev, A. Klümper, A. Schadschneider, J. Zittartz

cond-matarXiv:cond-mat/9409084

Abstract

A fermion model consisting of two chains with interchain tunneling is formulated and solved exactly by the Bethe ansatz method. The interchain tunneling leads to Cooper pair like bound states and a threshold energy is required to overcome the binding energy. The correlation functions manifest superconducting properties.

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