Negative critical currents in single-channel Josephson junctions

Abstract

We argue that negative critical currents arise generically in Josephson junctions formed by single channel conductors. Specifically, we theoretically study the Josephson coupling between two superconducting leads connected by a one-dimensional conductor in the Coulomb blockade regime. We show that in the clean regime the sign of the critical current alternates with the number of electrons in the normal region. For odd occupancy the critical current is negative even when the number of electrons on the conductor is large.

5 pages, this version of the preprint is virtually identical to the published paper

References in corpus (5)

• Supercurrent reversal in quantum dots
• Tunneling Spectroscopy of Quasiparticle Bound States in a Spinful Josephson Junction
• Pair Density Wave correlations in the Kondo-Heisenberg Model
• Quantum-Dot Parity Effects in Trivial and Topological Josephson Junctions
• Josephson current through a long quantum wire

Cited by in corpus (2)

• Supercurrent reversal in ferromagnetic hybrid nanowire Josephson junctions
• Engineering the Nonlinearity of Bosonic Modes with a Multi-loop SQUID