Optical readout of a superconducting qubit using a scalable piezo-optomechanical transducer

Superconducting quantum processors have made significant progress in size and computing potential. As a result, the practical cryogenic limitations of operating large numbers of superconducting qubits are becoming a bottleneck for further scaling. Due to the low thermal conductivity and the dense op...

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Bibliographic Details
Published in:arXiv.org 2024-08
Main Authors: van Thiel, T C, Weaver, M J, Berto, F, Duivestein, P, Lemang, M, Schuurman, K L, Žemlička, M, Hijazi, F, Bernasconi, A C, Ferrer, C, Lachman, E, Field, M, Mohan, Y, de Vries, F K, Bultink, C C, J van Oven, Mutus, J Y, Stockill, R, Gröblacher, S
Format: Article
Language:English
Subjects:
Accuracy
Coaxial cables
Modular equipment
Multiplexing
Optical communication
Optical fibers
Processors
Qubits (quantum computing)
Superconductivity
Thermal conductivity
Transducers
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Summary:Superconducting quantum processors have made significant progress in size and computing potential. As a result, the practical cryogenic limitations of operating large numbers of superconducting qubits are becoming a bottleneck for further scaling. Due to the low thermal conductivity and the dense optical multiplexing capacity of telecommunications fiber, converting qubit signal processing to the optical domain using microwave-to-optics transduction would significantly relax the strain on cryogenic space and thermal budgets. Here, we demonstrate optical readout through an optical fiber of a superconducting transmon qubit connected via a coaxial cable to a fully integrated piezo-optomechanical transducer. Using a demolition readout technique, we achieve a single shot readout fidelity of 81%. Due to the small footprint (
ISSN:2331-8422