Work

Parity readout in Majorana box qubits from the dispersive to the resonant regime

Year: 2026

Type: article

Abstract: We study theoretical models for charge reflectometry and capacitive readout of the Majorana parity degree of freedom in Majorana box qubits, considering decoherence channels within the framework of the Lindblad master equation. Noting that a parity-dependent dynamical susceptibility χ z ( ω ) governs both readout schemes, we provide a general expression for χ z ( ω ) which covers the full crossover from the resonant regime to the off-resonant dispersive regime. In addition, we reexamine previous results which were obtained under a semiclassical factorization assumption. Using three different error measures, we show that this approximation is quantitatively justified in the dispersive regime. In the resonant regime, however, we find deviations from exact reference data, obtained by numerical solution for the steady state of the full Lindblad equation. These deviations are typically of the order of a few percent in the considered error measures.

Source: Physical review. B./Physical review. B

DOI: 10.1103/j2x7-1h9c

Authors: Sara M. Benjadi, Reinhold Egger

Institution: Heinrich Heine University Düsseldorf

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: Deutsche Forschungsgemeinschaft

Award: TRR 183: Verschränkte Materiezustände