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Nature 450, 362-363 (15 November 2007) | doi:10.1038/450362b; Published online 14 November 2007
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Quantum optics: Kittens catch phase
Jonathan P. Dowling1
Abstract
The most sensitive phase-measuring instrument yet uses quantum trickery and a scaled-down version of the notorious Schrödinger's cat. It means that more sensitive devices for metrology and imaging could be on the way.
Elsewhere in this issue, a group of Australian researchers (Higgins et al., page 393)1 reports the construction of the most sensitive optical interferometer yet. At the heart of this success lies a cunning use of quantum feedback to minimize photon phase noise in the device — a technique that could have applications in imaging, remote sensing, gravity-wave detection and spectroscopy.
- Jonathan P. Dowling is at the Hearne Institute for Theoretical Physics, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
Email: jdowling@lsu.edu
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