Autoparametric resonance extending the bit-flip time of a cat qubit up to 0.3 s

Antoine Marquet, Antoine Essig, Joachim Cohen +9

Cat qubits, for which logical $|0⟩$ and $|1⟩$ are coherent states $|\pm \alpha ⟩$ of a harmonic mode, offer a promising route towards quantum error correction. Using dis…