Entangled images from four-wave mixing

V. Boyer, A.M. Marino, R.C. Pooser, P.D. Lett

Research output: Contribution to journalArticlepeer-review

450 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)544-547
Number of pages4
Issue number5888
Publication statusPublished - 25 Jul 2008


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