Holographic ghost imaging and the violation of a Bell inequality

B. Jack, J. Leach, J. Romero, S. Franke-Arnold, M. Ritsch-Marte, S. M. Barnett, M. J. Padgett

Research output: Contribution to journalArticle

140 Citations (Scopus)

Abstract

We demonstrate the contrast enhancement of images within a ghost-imaging system by use of nonlocal phase filters. We use parametric down-conversion as the two-photon light source and two separated phase modulators, in the signal and idler arms which represent different phase filters and objects, respectively. We obtain edge enhanced images as a direct consequence of the quantum correlations in the orbital angular momentum (OAM) of the down-converted photon pairs. For phase objects, with differently orientated edges, we show a violation of a Bell-type inequality for an OAM subspace, thereby unambiguously revealing the quantum nature of our ghost-imaging arrangement.

Original languageEnglish
Article number083602
Pages (from-to)-
Number of pages4
JournalPhysical Review Letters
Volume103
Issue number8
DOIs
Publication statusPublished - 21 Aug 2009

Cite this