A family of positive semidefinite operators is introduced that witnesses arbitrary logical GKP qubit states and enables their efficient characterization via three quadrature measurements.
Schmidt \ and\ author P
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Efficient characterization of general Gottesman-Kitaev-Preskill qubits
A family of positive semidefinite operators is introduced that witnesses arbitrary logical GKP qubit states and enables their efficient characterization via three quadrature measurements.