World's most accurate clock unveiled

LONDON: Inventors have unveiled the most accurate atomic clock ever made, marking a new leap forward in efforts to improve precision of navigation around the world.

The clock is based on a few thousand strontium atoms trapped in grids of laser light and is twice as accurate the current US time standard based on a 'fountain' of caesium atoms. The invention is also seen as an attempt to synchronise telecom networks and deep-space communications.
 
The unveiling of the next-generation atomic clock was reported in the journal Science by Dr Jun Ye and colleagues at JILA, US.

The team could link the new clock with existing clocks, using a special fibre optic link, which is crucial if the new clock is to be used as a timekeeping standard.

Since strontium atoms absorb higher frequency light than earlier clocks, which rely on longer microwaves, these optical clocks have shorter and more accurate 'ticks'-- 430 trillion per second, the Daily Telegraph reported.