Majorana parity readout tuning protocol

By iteratively adjusting tuning parameters and optimizing the MPR signal, the method addresses the challenge of fluctuating quantum capacitance in topological quantum computing, enhancing the accuracy and stability of Majorana parity readout in quantum computing devices.

WO2026127977A2 Publication Date: 2026-06-18MICROSOFT TECHNOLOGY LICENSING LLC
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
MICROSOFT TECHNOLOGY LICENSING LLC
Filing Date
2024-12-18
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Existing topological quantum computing devices face challenges in optimizing the Majorana Parity Readout (MPR) signal, which is crucial for accurately measuring the parity of Majorana zero modes, due to fluctuations and noise in quantum capacitance, requiring an efficient tuning protocol to enhance signal quality.

⚗Method used

A method is introduced to iteratively adjust tuning parameters such as QD detuning, enclosed flux, QD-MZM coupling, and QD-QD coupling, using a readout resonator to optimize the MPR signal by maximizing the difference in quantum capacitance between parity states, and employing a detailed tuning protocol involving quantum dot and topological segment tuning.

🎯Benefits of technology

The method enhances the signal-to-noise ratio of MPR measurements, allowing for more accurate parity readout and improved fault-tolerant quantum computing by stabilizing the parity of Majorana zero modes.

✦ Generated by Eureka AI based on patent content.

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Abstract

Examples are disclosed that relate to tuning a topological qubit device. One example provides, on a quantum computing device, a method of tuning a topological qubit device (400) into a Majorana Parity Readout (MPR) configuration. The method comprises performing optimization of an MPR signal by iteratively adjusting one or more tuning parameters of a plurality of tuning parameters, the plurality of tuning parameters comprising a quantum dot (QD) (QD1, QD2, QD3, QD4, QD5, QD6, QD7) detuning, an enclosed flux, a voltage of a topological wire, a QD-Majorana zero mode (MZM) (410, 420, 430, 440) coupling, and a QD-QD coupling. Performing optimization of the MPR signal further comprises iteratively measuring the MPR signal using a readout resonator. Optimization of the MPR signal is iteratively performed until reaching a success metric.
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