Heralded single-photon generation using imperfect single-photon sources and a two-photon-absorbing medium

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Thomas Konrad, Artur Scherer, Michael Nock, and Jürgen Audretsch
Fachbereich Physik, Universität Konstanz, D-78457 Konstanz, Germany

Received 2 November 2005; published 21 March 2006

Wepropose a setup for a heralded, i.e., announced generation ofa pure single-photon state given two imperfect sources whose outputsare represented by mixtures of the single-photon Fock state |1with the vacuum |0. Our purification scheme uses beam splitters,photodetection, and a two-photon-absorbing medium. The admixture of the vacuumis fully eliminated. We discuss two potential realizations of thescheme.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.73.032327
DOI:	10.1103/PhysRevA.73.032327
PACS:	03.67.Lx; 42.50.Gy; 03.67.Hk 03.67.Lx Quantum computation 42.50.Gy Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption 03.67.Hk Quantum communication YEAR: 2006
KEYWORDS:	two-photon processes, quantum optics, optical beam splitters

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