Photon emission is a major source of decoherence for several quantum technologies. Four superconducting qubits have been combined to create a ‘dark state’ qubit with strongly suppressed photon emission due to collective interference effects.
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Masson, S.J., Asenjo-Garcia, A. Darkness tamed with superconducting qubits. Nat. Phys. 18, 490–491 (2022). https://doi.org/10.1038/s41567-022-01571-6
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DOI: https://doi.org/10.1038/s41567-022-01571-6
