Phys. Rev. A 66, 013810 (2002) [6 pages]Measuring the elements of the optical density matrixReceived 11 September 2001; published 22 July 2002 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. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.66.013810
DOI:
10.1103/PhysRevA.66.013810
PACS:
42.50.Dv, 03.65.Wj
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