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Correlated imaging with macroscopic fields
Author(s) -
Brambilla E.,
Gatti A.,
Bache M.,
Lugiato L.A.
Publication year - 2004
Publication title -
fortschritte der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.469
H-Index - 71
eISSN - 1521-3978
pISSN - 0015-8208
DOI - 10.1002/prop.200410178
Subject(s) - ghost imaging , physics , beam splitter , homodyne detection , spontaneous parametric down conversion , parametric statistics , optics , photon , beam (structure) , photon entanglement , analogy , statistical physics , quantum mechanics , quantum entanglement , mathematics , laser , statistics , quantum , linguistics , philosophy
Abstract We demonstrate analytically that correlated imaging in the regime of large photon number can be implemented using both a classical and an entangled source. The classically correlated beams are obtained by dividing thermal radiation by a beam splitter while entangled beams are obtained through parametric down‐conversion. By treating the two system in parallel, a formal analogy is outlined between the two cases showing that classical beams can mimic qualitatively all the imaging features of the entangled beams. We also propose a method to improve substantially the imaging performances of correlated imaging which is based on homodyne detection combined with spatial averages.