Phys. Rev. A 65, 043815 (2002) [10 pages]Continuously induced coherence without induced emissionReceived 29 January 2001; revised 1 November 2001; published 4 April 2002 Coherence properties of two down-converters continuously coupled via idler beams are analyzed. A formal equivalence between this device and two well-known experiments on quantum interference by Mandel’s group is developed. As in these experiments the signal coherence is shown to be induced by a principal indistinguishability of signal photons. We also show that the which-way information about a signal photon carried by the idler beams periodically attains its maximum and minimum values in the course of the evolution. The optimal which-way measurement for our setup is constructed. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.65.043815
DOI:
10.1103/PhysRevA.65.043815
PACS:
42.50.Dv, 42.50.Ar
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