Entangled Images from Four-Wave Mixing
Top Cited Papers
- 25 July 2008
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 321 (5888), 544-547
- https://doi.org/10.1126/science.1158275
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.Keywords
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