2007/09/20 by K. Garay-Palmett, H. J. McGuinness, Offir Cohen +7
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1364/oe.15.014870
published as Opt. Express 15, 14870-14886 (2007) · 17 pages, 7 figures, submitted
arxiv created 2007/09/20 · arxiv updated 2009/12/01
We study theoretically the generation of photon pairs by spontaneous four-wave mixing (SFWM) in photonic crystal optical fiber. We show that it is possible to engineer two-photon states with specific spectral correlation (``entanglement'') properties suitable for quantum information processing applications. We focus on the case exhibiting no spectral correlations in the two-photon component of the state, which we call factorability, and which allows heralding of single-photon pure-state wave packets without the need for spectral post filtering. We show that spontaneous four wave mixing exhibits a remarkable flexibility, permitting a wider class of two-photon states, including ultra-broadband, highly-anticorrelated states.