Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
National Philanthropic Trust

Site Tools

  • AAAS
  • Subscribe
  • Feedback

Site Search

Search Advanced

Originally published in Science Express on 12 June 2008
Science 25 July 2008:
Vol. 321. no. 5888, pp. 544 - 547
DOI: 10.1126/science.1158275
Prev | Table of Contents | Next

Reports

Entangled Images from Four-Wave Mixing

Vincent Boyer,* Alberto M. Marino, Raphael C. Pooser, Paul D. Lett*

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.

Joint Quantum Institute, National Institute of Standards and Technology, University of Maryland, Gaithersburg, MD 20899, USA.

* To whom correspondence should be addressed. E-mail: vincent.boyer{at}nist.gov (V.B.); paul.lett{at}nist.gov (P.D.L.)

Read the Full Text

ADVERTISEMENT
Click Me!

ADVERTISEMENT
Click Me!

To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)