Measuring the individual elements of the optical density matrix
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Author(s)
Pregnell, KL
Pegg, DT
Pegg, DT
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Shapiro, JH
Hirota, O
Date
2003
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Abstract
Most methods for experimentally reconstructing the quantum state of light involve determining a quasiprobability distribution such as the Wigner function. In this paper we present a scheme for measuring individual density matrix elements in the photon number state representation. Remarkably, the scheme is simple, involving two beam splitters and a reference field in a coherent state.
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Proceedings of the Sixth International Conference on Quantum Communication, Measurement and Computing