Atomic fountain clocks are at present the most accurate clocks in the world: Caesium fountain clocks furnish the second accurate to 15 places after the decimal point. Until they reach this accuracy, ...

Clocks on Earth are ticking a bit more regularly thanks to NIST-F4, a new atomic clock at the National Institute of Standards and Technology (NIST) campus in Boulder, Colorado. NIST-F4 measures an ...

Dr. Frank Narducci, professor and chair of the NPS Department of Physics, and doctoral student U.S. Navy Cmdr. Jens Berdahl are making progress on the installation of an atomic fountain at NPS in an ...

NIST restored the precision of its atomic clocks after a power outage caused by a power outage disrupted operations. Discover ...

Learn about NIST-F4, the latest cesium fountain clock that now stands as one of the most accurate timekeepers in the entire world. The universal need to be on time keeps everyone on the move, shaping ...

Finding ways to reduce quantum noise can enhance the precision of measurement in atomic fountain clocks or in methods used for quantum information processing. Physicists are now investigating ways of ...

Knowing what time it is down to the very last sliver of a second is easy — but only if you happen to have an atomic clock in your pocket. Unfortunately, most such devices wouldn't fit. In fact, there ...

Atomic clocks are established as the most precise timekeepers created. Atomic clocks work by deploying lasers to measure the vibrations of atoms (electromagnetic signals). By atoms oscillating at a ...

Just days before the new year began, the United States followed through on a resolution to keep better track of time in the years ahead. On Dec. 29, the National Institute of Standards and Technology ...

In 1797, English scientist Henry Cavendish measured the strength of gravity with a contraption made of lead spheres, wooden rods and wire. In the 21st century, scientists are doing something very ...

NIST scientists have published results establishing a new atomic clock, NIST-F4, as one of the world’s most accurate timekeepers, priming the clock to be recognized as a primary frequency standard — ...