2010. a USA Riikliku Etalonide ja Tehnoloogia Instituudi füüsikute poolt välja töötatud kvantkell oli 37 korda täpsem kui toonane rahvusvaheline etalon, ja põhineb loogilise aatomiga alumiiniumspektroskoopia ioonil.
The quantum clock developed in 2010 by physicists at the U.S. National Institute of Standards and Technology, the clock was 37 times more precise than the then-existing international standard, and the quantum clock is based on an aluminium spectroscopy ion with a logic atom.
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