Alice & Bob, ENS Lyon Detail DC-Biased SQUID for Cat Qubit Control

VERA Brief

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Alice & Bob and ENS Lyon have demonstrated a DC-biased SQUID architecture for stabilizing cat qubits. This approach uses a microvolt-scale DC voltage instead of microwave pumps to mitigate nonlinearities and provide scalable control for superconducting bosonic codes.

Key facts

• A DC-biased SQUID architecture has been demonstrated for stabilizing cat qubits.
• This new method uses a microvolt-scale DC voltage, replacing traditional microwave pumps.
• The technique aims to eliminate unwanted Kerr nonlinearities.
• It provides a scalable control mechanism for superconducting bosonic codes.
• The experimental setup showed selective activation of photon conversion processes, allowing for deterministic pair-photon extraction.