Efficient Conditional Preparation of High-Fidelity Single Photon States for Fiber-Optic Quantum Networks

Alfred B. U’Ren, Christine Silberhorn, Konrad Banaszek, and Ian A. Walmsley
Phys. Rev. Lett. 93, 093601 – Published 25 August 2004

Abstract

Highly correlated photons or, accordingly, high-fidelity single-photon states are a prerequisite for closing detection loopholes in experimental tests of local realism and implementing scalable linear optical quantum computation. We demonstrate a parametric down-conversion source exhibiting a conditional detection efficiency of 51% (with corresponding preparation efficiency of 85%) and extraordinarily high detection rates of up to 8.5×105   coincidences/(smW). We exploit a novel type-II phase matching configuration in a microstructured waveguide in conjunction with an ultrashort pump.

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  • Received 12 December 2003

DOI:https://doi.org/10.1103/PhysRevLett.93.093601

©2004 American Physical Society

Authors & Affiliations

Alfred B. U’Ren1,2, Christine Silberhorn1, Konrad Banaszek1, and Ian A. Walmsley1

  • 1Clarendon Laboratory, Oxford University, Parks Road, Oxford, OX1 3PU, United Kingdom
  • 2The Institute of Optics, University of Rochester, Rochester, New York 14627, USA

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Issue

Vol. 93, Iss. 9 — 27 August 2004

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