Quantum homodyne tomography of a two-photon Fock state

Details Quantum homodyne tomography of a two-photon Fock state Quantum homodyne tomography of a two-photon Fock state

2006-03-31

arxiv.org/abs/quant-ph/0603284v2

Phys. Rev. Lett. 96, 213601 (2006)

Physics

Quantum Physics

4 pages, 6 figures Revised version : corrected typo and references

Scientific paper

10.1103/PhysRevLett.96.213601

We present a continuous-variable experimental analysis of a two-photon Fock state of free-propagating light. This state is obtained from a pulsed non-degenerate 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.

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