Phys. Rev. A 76, 043825 (2007) [7 pages]Effects of frequency correlation in linear optical entangling gates operated with independent photonsReceived 27 April 2007; revised 11 July 2007; published 17 October 2007 Bose-Einstein coalescence of independent photons at the surface of a beam splitter is the physical process that allows linear optical quantum gates to be built. When distinct parametric down-conversion events are used as an independent photon source, distinguishability arises form the energy correlation of each photon with its twin. We derive upper bound for the entanglement which can be generated under these conditions. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.76.043825
DOI:
10.1103/PhysRevA.76.043825
PACS:
42.50.Dv, 03.67.Mn, 42.65.Lm, 42.50.St
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