Boffins build super-accurate atomic clock
300 million years without winding
The atomic clocks currently used for regulating international time zones are great and all, but who has the time every few million years to adjust them?
Fortunately, physicists in the US have figured out how to control seemingly “forbidden” collisions between neutral strontium atoms to make a clock that neither loses nor gains a second in more than 300 million years.
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Major Boost In Atomic Clock Accuracy: Loses Or Gains Less Than A Second Every 300 Million Years
ScienceDaily (Apr. 17, 2009) — Physicists have measured and controlled seemingly forbidden collisions between neutral strontium atoms—a class of antisocial atoms known as fermions that are not supposed to collide when in identical energy states. The advance makes possible a significant boost in the accuracy of atomic clocks based on hundreds or thousands of neutral atoms.
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