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Entangled images from four-wave mixing

TitleEntangled images from four-wave mixing
Publication TypeJournal Article
Year of Publication2008
AuthorsV. Boyer, A. M. Marino, R. C. Pooser, and P. D. Lett
JournalScience
Volume321
Pagination544–7
Date Publishedjul
ISSN1095-9203
Keywords2008, Single Fellow
Abstract

Two beams of light can be quantum mechanically entangled through correlations of their phase and intensity fluctuations. For a pair of spatially extended image-carrying light fields, the concept of entanglement can be applied not only to the entire images but also to their smaller details. We used a spatially multimode amplifier based on four-wave mixing in a hot vapor to produce twin images that exhibit localized entanglement. The images can be bright fields that display position-dependent quantum noise reduction in their intensity difference or vacuum twin beams that are strongly entangled when projected onto a large range of different spatial modes. The high degree of spatial entanglement demonstrates that the system is an ideal source for parallel continuous-variable quantum information protocols.

URLhttp://www.sciencemag.org/content/321/5888/544.abstract