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APS » Journals » Phys. Rev. Lett. » Volume 96 » Issue 24
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Phys. Rev. Lett. 96, 240502 (2006) [4 pages]

Experimental Interference of Independent Photons

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Rainer Kaltenbaek and Bibiane Blauensteiner
Institute for Experimental Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria

Marek Żukowski
Institute for Experimental Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria and Institute of Theoretical Physics and Astrophysics, University of Gdansk, Wita Stwosza 57, PL-08-952 Gdansk, Poland

Markus Aspelmeyer and Anton Zeilinger
Institute for Experimental Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria and Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences, Boltzmanngasse 3, A-1090 Vienna, Austria

Received 7 March 2006; published 21 June 2006

Interference of photons emerging from independent sources is essential for modern quantum-information processing schemes, above all quantum repeaters and linear-optics quantum computers. We report an observation of nonclassical interference of two single photons originating from two independent, separated sources, which were actively synchronized with a rms timing jitter of 260 fs. The resulting (two-photon) interference visibility was (83±4)%.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.240502
DOI:
10.1103/PhysRevLett.96.240502
PACS:
03.67.Hk, 03.65.Ta, 42.50.Xa, 42.65.Lm
 
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