Sternreiter

From ScienceDaily:The world’s most precise clock – on which all time-keeping and navigation systems are based – might be made as small as a wristwatch with a new design proposed by an international team of physicists.A new class of atomic clocks of at least equivalent accuracy could be made much smaller and simpler by trapping aluminium, gallium, cesium or rubidium atoms in a lattice of laser

Cesium has been the element of choice, thus far, for the most accurate clocks. It is in use in our civilian time standard.But make way, Cesium:An experimental atomic clock based on ytterbium atoms is about four times more accurate than it was several years ago, giving it a precision comparable to that of the NIST-F1 cesium fountain clock, the nation’s civilian time standard, scientists at the