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Alice & Bob and ENS Lyon have successfully demonstrated a DC-biased SQUID architecture that stabilizes cat qubits by replacing traditional microwave pumps with microvolt-scale DC voltage. This approach eliminates unwanted Kerr nonlinearities and enables deterministic photon conversion, offering a scalable path toward robust quantum error correction for superconducting bosonic codes.

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Alice & Bob and ENS Lyon Demonstrate DC-Biased SQUID Architecture for Multi-Photon Cat Qubit Dissipation

Quantum Computing ReportOctober 1, 20263 min read

Alice & Bob and ENS Lyon have demonstrated a DC-biased SQUID architecture for stabilizing cat qubits, replacing traditional microwave pumps with a microvolt-scale DC voltage. This method eliminates unwanted Kerr nonlinearities and provides a scalable control mechanism for superconducting bosonic codes. The experimental setup showed selective activation of 1-to-1, 2-to-1, and 4-to-1 photon conversion processes, enabling deterministic pair-photon extraction and paving the way for more robust quantum error correction. The post Alice & Bob and ENS Lyon Demonstrate DC-Biased SQUID Architecture for Multi-Photon Cat Qubit Dissipation appeared first on Quantum Computing Report.

Fault-tolerant quantum hardware developer Alice & Bob, in collaboration with researchers at the École Normale Supérieure de Lyon (ENS Lyon), has published experimental results demonstrating a direct-current (DC) voltage-biased SQUID coupler to engineer multi-photon dissipation for cat-qubit stabilization. The physical…

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