Title | Entangled images from four-wave mixing |
Publication Type | Journal Article |
Year of Publication | 2008 |
Authors | V. Boyer, A. M. Marino, R. C. Pooser, and P. D. Lett |
Journal | Science |
Volume | 321 |
Pagination | 544–7 |
Date Published | jul |
ISSN | 1095-9203 |
Keywords | 2008, 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. |
URL | http://www.sciencemag.org/content/321/5888/544.abstract |