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arXiv · 2209.08082

Detecting Majorana modes by readout of poisoning-induced parity flips

Jens Schulenborg·Svend Krøjer·Michele Burrello·Martin Leijnse·Karsten Flensberg
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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.

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Jens Schulenborg, Svend Krøjer, Michele Burrello, Martin Leijnse, Karsten Flensberg. 2022-09-16. Detecting Majorana modes by readout of poisoning-induced parity flips. https://doi.org/10.1103/physrevb.107.l121401

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