Informational completeness of continuous-variable measurements

Abstract

We justify that homodyne tomography turns out to be informationally complete when the number of independent quadrature measurements is equal to the dimension of the density matrix in the Fock representation. Using this as our thread, we examine the completeness of other schemes, when continuous-variable observations are truncated to discrete finite-dimensional subspaces.

To appear in Phys. Rev. A

References in corpus (4)

• Discrimination of binary coherent states using a homodyne detector and a photon number resolving detector
• Geometrical approach to mutually unbiased bases
• An effective method to estimate multidimensional Gaussian states
• Mutually unbiased bases and generalized Bell states

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