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An atomic clock is a clock that measures time by monitoring the resonant frequency of atoms. It is based on atoms having different energy levels. Electron states in an atom are associated with different energy levels, and in transitions between such states they interact with a very specific frequency of electromagnetic radiation.
16 sty 2014 · JILA’s strontium atomic clock is now the world’s most accurate clock based on neutral atoms.
22 sty 2014 · Heralding a new age of terrific timekeeping, a research group led by a National Institute of Standards and Technology (NIST) physicist has unveiled an experimental strontium atomic clock that has set new world records for both precision and stability—key metrics for the performance of a clock.
21 kwi 2015 · As described in Nature Communications,** the experimental strontium lattice clock at JILA, a joint institute of NIST and the University of Colorado Boulder, is now more than three times as precise as it was last year, when it set the previous world record.
11 lip 2024 · An optical atomic clock measures the energy transitions of strontium atoms rather than the caesium atoms used in the clocks that are the world’s official time-keepers. Credit: K....
10 lip 2024 · Lasers, seen here as red dots, have been used to create an optical lattice to trap an extremely cold gas of strontium atoms. The atoms are held in a vacuum and probed by a clock laser, yielding an exceptionally precise and accurate ticking rate. [Image: K. Palubicki/NIST]
1 kwi 2024 · Scientists from the University of Colorado Boulder have created an atomic clock using lasers and strontium atoms that’s incredibly accurate—only losing one second every 40 billion years.
