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.
@article{arxiv.quant-ph/0603284,
title = {Quantum homodyne tomography of a two-photon Fock state},
author = {Alexei Ourjoumtsev and Rosa Tualle-Brouri and Philippe Grangier},
journal= {arXiv preprint arXiv:quant-ph/0603284},
year = {2007}
}
Comments
4 pages, 6 figures Revised version : corrected typo and references