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Alice & Bob and ENS Lyon have demonstrated a voltage-driven method for stabilizing cat qubits that eliminates the need for microwave drives, resulting in more compact hardware with reduced heat generation. By achieving a two-photon exchange rate of 3 MHz without microwaves, this approach suppresses unwanted frequency shifts while enabling flexible photon exchanges on a single chip. This advancement directly addresses critical scalability and thermal management challenges in superconducting quantum architectures.

Sources coveringThe Quantum Insider, LessWrong, Quantum Zeitgeist, arXiv

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Alice & Bob Demonstrates New Approach to Stabilizing Cat With DC Voltage Bias

The Quantum InsiderOctober 1, 20264 min read

Insider Brief PRESS RELEASE — Alice & Bob, a leader in fault-tolerant quantum computing, and the École Normale Supérieure de Lyon today announced a new and faster approach to stabilising cat-qubits in superconducting quantum systems enabling more compact designs that generate less heat. Cat qubits, which store information in a microwave resonator, are stabilised by a process that dissipates photons from […]

Alice & Bob and ENS Lyon demonstrated a voltage-driven approach to stabilizing cat qubits that could enable more compact quantum hardware with lower heat generation. The device achieved a two-photon exchange rate of 3 MHz without a microwave drive, exceeding previous microwave-driven cat-qubit couplers while suppressing an unwanted frequency effect. Adjusting the voltage enabled one-, two- and four-photon exchanges on the same chip, potentially supporting…

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