Quantum-Dot Parity Effects in Trivial and Topological Josephson Junctions

Abstract

An odd-occupied quantum dot in a Josephson junction can flip transmission phase, creating a π-junction. When the junction couples topological superconductors, no phase flip is expected. We investigate this and related effects in a full-shell hybrid interferometer, using gate voltage to control dot-junction parity and axial magnetic flux to control the transition from trivial to topological superconductivity. Enhanced zero-bias conductance and critical current for odd parity in the topological phase reflects hybridization of the confined spin with zero-energy modes in the leads.

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Cited by in corpus (5)

• Asymmetric Little-Parks Oscillations in Full Shell Double Nanowires
• Robust topological superconductivity in weakly coupled nanowire-superconductor hybrid structures
• Enhancement of the Kondo effect in a quantum dot formed in a full-shell nanowire
• Helical and topological phase detection based on nonlocal conductance measurements in a three terminal junction
• Confinement-induced zero-bias peaks in conventional superconductor hybrids