Measuring the elements of the optical density matrix

Details Measuring the elements of the optical density matrix Measuring the elements of the optical density matrix

2002-09-25

arxiv.org/abs/quant-ph/0209132v1

Phys. Rev. A 66, 013810 (2002)

Physics

Quantum Physics

6 pages and 1 figure

Scientific paper

10.1103/PhysRevA.66.013810

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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