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Science

Submission + - Most Accurate Clock (wordpress.com)

An anonymous reader writes: An optical clock that is twice as accurate as any other has been unveiled by physicists in the US. The clock, which is based on a singlealuminium ion, could remain accurate to within one second over 3.7 billion years. The previous record was held by a clock with onemercury ion, which was good to one second in 1.7 billion years.This clock usee a different principle quantum-interference protocol which makes it more accurate.

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