2006/03/31 by Alexei Ourjoumtsev, Rosa Tualle-Brouri, Philippe Grangier · 4 citations
Computer Science · Physics and Astronomy · #Algorithm #Beam (structure) #Cold Atom Physics and Bose-Einstein Condensates #Direct-conversion receiver #Fock space #Fock state #Homodyne detection #Optics #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum mechanics #Quantum optics #Quantum optics and atomic interactions #Quantum state #Quantum tomography #Spontaneous parametric down-conversion #State (computer science) #Wigner distribution function #quant-ph
paper · pdf · doi:10.1103/physrevlett.96.213601
published as Phys. Rev. Lett. 96, 213601 (2006) · 4 pages, 6 figures Revised version : corrected typo and references
openalex publication_date 2006/06/01 · arxiv created 2006/07/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.