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Quantum Flashlight Pierces the Darkness With a Few Percent as Many Photons

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Science  12 Sep 2008:
Vol. 321, Issue 5895, pp. 1433-1443
DOI: 10.1126/science.321.5895.1433a

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A theoretical analysis on page 1463 of this week's issue of Science shows how to detect objects using strangely interconnected particles of light, or photons, greatly reducing the number of photons needed.