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

Abstract

Superconducting quantum processors have made significant progress in size and computing potential. However, 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 of a superconducting transmon qubit through an optical fiber 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%. Our results illustrate the benefits of piezo-optomechanical transduction for low-dissipation operation of large quantum processors.

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Cited by in corpus (7)

• Scalable microwave-to-optical transducers at single photon level with spins
• Cryogenic Thermal Modeling of Microwave High Density Signaling
• Parametric multi-element coupling architecture for coherent and dissipative control of superconducting qubits
• Release-free electro-optomechanical crystal modulator
• Quantum Acoustics with Superconducting Qubits in the Multimode Transition-Coupling Regime
• Loss Mechanisms in High-coherence Multimode Mechanical Resonators Coupled to Superconducting Circuits
• Routing single photons with quantum emitters coupled to nanostructures