2010/10/31 by Kaisa Laiho, Katiuscia N. Cassemiro, David Gross +1 · 1 citation
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physrevlett.105.253603
published as Phys. Rev. Lett. 105, 253603 (2010) · 4 pages, 4 figures
arxiv created 2010/12/23 · arxiv updated 2010/12/24
We investigate quantum properties of pulsed light fields point by point in phase space. We probe the negative region of the Wigner function of a single photon generated by the means of waveguided parametric down-conversion. This capability is achieved by employing loss-tolerant photon-number resolving detection, allowing us to directly observe the oscillations of the photon statistics in dependence of applied displacements in phase space. Our scheme is highly mode sensitive and can reveal the single-mode character of the signal state.