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Josephson Current in Luttinger Liquid-Superconductor Junctions

J.-S. Caux, H. Saleur, F. Siano

DOI 10.1103/PhysRevLett.88.106402 · Physical Review Letters

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Abstract

We study the Josephson current through a Luttinger liquid in contact with two superconductors. We show that it can be deduced from the Casimir energy in a two-boundary version of the sine-Gordon model. We develop a new thermodynamic Bethe ansatz, which, combined with a subtle analytic continuation procedure, allows us to calculate this energy in closed form, and obtain the complete current-crossover function from the case of complete normal to complete Andreev reflection.

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