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Science 28 June 2002:
Vol. 296. no. 5577, pp. 2316 - 2317
DOI: 10.1126/science.296.5577.2316b
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News of the Week

OPTICS:
New Twist Could Pack Photons With Data

Andrew Watson

Photons have long been known to spin, but it is also possible to give them an additional form of angular momentum, a sort of twist. A team of physicists in the United Kingdom has now devised a way to measure the twisting of single photons. In principle, physicists could use a photon's twist to load huge quantities of data onto a single photon, revolutionizing optical communications and quantum computing.

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