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Crystal Stops Light in Its Tracks

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Science  11 Jan 2002:
Vol. 295, Issue 5553, pp. 255
DOI: 10.1126/science.295.5553.255

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For years, physicists have been slowing light down to a crawl, and even stopping it in its tracks, by shooting laser beams into cold gases known as Bose-Einstein condensates. Now, researchers have done the same thing in a much less exotic solid. The advance may one day lead to memory devices for computers that store information on beams of light.