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Quantum-logic clock is the new hotness in accuracy
Saturday, 06 February 2010

quantum_clock.jpg

The quantum-logic clock, which detects the energy state of a single aluminum ion, keeps time to within a second every 3.7 billion years. The new timekeeper could one day improve GPS or detect the slowing of time predicted by Einstein's theory of general relativity.

[via Wired Science]

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