Phys. Rev. Lett. 96, 213601 (2006) [4 pages]Quantum Homodyne Tomography of a Two-Photon Fock StateReceived 20 December 2005; published 1 June 2006 We present a continuous-variable experimental analysis of a two-photon Fock state of free-propagating light. This state is obtained from a pulsed nondegenerate parametric amplifier, which produces two intensity-correlated twin beams. Counting two photons in one beam projects the other beam in the desired two-photon Fock state, which is analyzed by using a pulsed homodyne detection. The Wigner function of the measured state is clearly negative. We developed a detailed analytic model which allows a fast and efficient analysis of the experimental results. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.213601
DOI:
10.1103/PhysRevLett.96.213601
PACS:
42.50.Dv, 03.65.Wj
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