AC Josephson transport through interacting quantum dots

Abstract

We investigate the AC Josephson current through a quantum dot with strong Coulomb interaction attached to two superconducting and one normal lead. To this end, we perform a perturbation expansion in the tunneling couplings within a diagrammatic real-time technique. The AC Josephson current is connected to the reduced density matrix elements that describe superconducting correlations induced on the quantum dot via proximity effect. We analyze the dependence of the AC signal on the level position of the quantum dot, the charging energy, and the applied bias voltages.

9 pages, 4 figures

References in corpus (12)

• Supercurrent reversal in quantum dots
• Josephson and Andreev transport through quantum dots
• Critical Current 0-$\pi$ Transition in Designed Josephson Quantum Dot Junctions
• Josephson current through a single Anderson impurity coupled to BCS leads
• Transport Through Andreev Bound States in a Graphene Quantum Dot
• Even-odd effect in Andreev Transport through a Carbon Nanotube Quantum Dot
• Kondo-Enhanced Andreev Tunneling in InAs Nanowire Quantum Dots
• Kondo Universal Scaling for a Quantum Dot Coupled to Superconducting Leads
• Real-time diagrammatic approach to transport through interacting quantum dots with normal and superconducting leads
• Kondo effect in asymmetric Josephson couplings through a quantum dot
• Superconducting non-equilibrium transport through a weakly interacting quantum dot
• Polaron effects on the dc- and ac-tunneling characteristics of molecular Josephson junctions

Cited by in corpus (6)

• Renormalization effects in interacting quantum dots coupled to superconducting leads
• Non-equilibrium transport through a Josephson quantum dot
• Tunnel spectroscopy of Majorana bound states in topological superconductor-quantum dot Josephson junctions
• A particle conserving approach to AC-DC driven interacting quantum dots with superconducting leads
• Nano-mechanics driven by Andreev tunneling
• Collapse of the Josephson emission in a carbon nanotube junction in the Kondo regime