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NIST

Precise Clock

NIST scientists have built a second "quantum logic clock," using quantum information processing techniques on a single ion of aluminium to make a clock that would not gain or lose more than one second in about 3.7 billion years.Ā Ā 

For more information, please see: http://www.nist.gov/pml/div688/clocks_092810.cfm .

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