A circuit using two vacuum ancillas and six SUM gates maps a continuous-variable state so that measuring the ancillas in momentum samples its Husimi Q-function, enabling single-shot coherent-state estimation, Gaussian parameter recovery, and Q-tomography.
Quantum error cor- rection with the gottesman-kitaev-preskill code
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Quantum Coherent State Transform on Continuous-Variable Systems
A circuit using two vacuum ancillas and six SUM gates maps a continuous-variable state so that measuring the ancillas in momentum samples its Husimi Q-function, enabling single-shot coherent-state estimation, Gaussian parameter recovery, and Q-tomography.