Optical clock sets new accuracy record, bringing us closer to a new definition of the second

A research team at VTT MIKES has set a new record in optical-clock absolute frequency measurements using a strontium single-ion clock with exceptionally low uncertainty and high uptime.

A Chip that Keeps Time (Almost) Like an Atomic Clock

For decades, atomic clocks have provided the most stable means of timekeeping. They measure time by oscillating in step with ...
Physics World

New definition of second ticks closer after international optical-clock comparison

Bright idea Optical fibres are playing a crucial role in the comparison of optical clocks. (Courtesy: istock/morepixels) Atomic clocks are crucial to many modern technologies including satellite ...
IFLScience

Multi-Ion Optical Atomic Clock Takes A Step Towards Changing The Definition Of A Second

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...
Morning Overview on MSN

An optical clock sets a record, edging us toward a new second

Physicists are quietly rewriting one of the most basic units in science, using a new generation of optical clocks that can keep time so precisely they barely lose a beat over the age of the universe.
ExtremeTech

Optical lattice clock could change the definition of the second

Tucked away in a vault in France is a weight made of platinum and iridium, diligently cared for by a team of highly trained specialists. Its sole purpose is to be, to sit and remain unchanging as the ...
PC Magazine

per clock

For each clock cycle. The phrase "the CPU does four instructions per clock" means that four machine instructions have been executed within one cycle of the CPU clock, the master clock that ...