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28 March 2024
 
  » arxiv » quant-ph/0306020

 Article overview


Experimental verification of energy correlations in entangled photon pairs
Jan Soubusta ; Jan Perina Jr ; Martin Hendrych ; Ondrej Haderka ; Pavel Trojek ; Miloslav Dusek ;
Date 3 Jun 2003
Subject quant-ph
AbstractProperties of entangled photon pairs generated in spontaneous parametric down-conversion are investigated in interference experiments. Strong energy correlations are demonstrated in a direct way. If a signal photon is detected behind a narrow spectral filter, then interference appears in the Mach-Zehnder interferometer placed in the route of the idler photon, even if the path difference in the interferometer exceeds the coherence length of the light. Narrow time correlations of the detection instants are demonstrated for the same photon-pair source using the Hong-Ou-Mandel interferometer. Both these two effects may be exhibited only by an entangled state.
Source arXiv, quant-ph/0306020
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