Production of heralded pure single photons from imperfect sources using cross-phase-modulation

Thomas Konrad*, Michael Nock, Artur Scherer, Jürgen Audretsch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Realistic single-photon sources do not generate single photons with certainty. Instead they produce statistical mixtures of photons in Fock states 1 and vacuum (noise). We describe how to eliminate the noise in the output of the sources by means of another noisy source or a coherent state and cross-phase-modulation (XPM). We present a scheme that announces the production of pure single photons and thus eliminates the vacuum contribution. This is done by verifying a XPM-related phase shift with a Mach-Zehnder interferometer.

Original languageEnglish
Article number032331
Pages (from-to)1-8
Number of pages8
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number3
Publication statusPublished - 2006
Externally publishedYes


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