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Phys Rev Lett. 2004 Jan 23;92(3):033601. Epub 2004 Jan 22.

Quantum and classical coincidence imaging.

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  • 1The Institute of Optics, University of Rochester, Rochester, New York 14627, USA.

Erratum in

  • Phys Rev Lett. 2004 Feb 13;92(6):069901.


Coincidence, or ghost, imaging is a technique that uses two correlated optical fields to form an image of an object. In this work we identify aspects of coincidence imaging which can be performed with classically correlated light sources and aspects which require quantum entanglement. We find that entangled photons allow high-contrast, high-resolution imaging to be performed at any distance from the light source. We demonstrate this fact by forming ghost images in the near and far fields of an entangled photon source, noting that the product of the resolutions of these images is a factor of 3 better than that which is allowed by classical diffraction theory.

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