Detecting Majorana modes by readout of poisoning-induced parity flips

Abstract

Reading out the parity degree of freedom of Majorana bound states is key to demonstrating their nonabelian exchange properties. Here, we present a low-energy model describing localized edge states in a two-arm device. We study parity-to-charge conversion based on coupling the superconductor bound states to a quantum dot whose charge is read out by a sensor. The dynamics of the system, including the readout device, is analyzed in full using a quantum-jump approach. We show how the resulting signal and noise ratio differentiates between local Majorana and Andreev bound states.

Main paper: 7 pages, 3 figures. Supplementary material: 10 pages, 7 figures

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Cited by in corpus (7)

• Roadmap towards Majorana qubits and nonabelian physics in quantum dot-based minimal Kitaev chains
• Flip-chip-based fast inductive parity readout of a planar superconducting island
• Dynamics of parafermionic states in transport measurements
• Spectroscopy of hot-electron pair emission from a driven quantum dot
• Transport-based fusion that distinguishes between Majorana and Andreev bound states
• Super-Poissonian noise from quasiparticle poisoning in electron transport through a pair of Majorana bound states
• Parity readout in Majorana box qubits from the dispersive to the resonant regime