A network of optical clocks opens the door to redefining the second
A team of researchers has performed the most comprehensive coordinated comparison of optical clocks - a type of high-precision atomic clock - to date, running them simultaneously in six different countries. According to the authors, who publish the results in the journal Optica, the work “supports progress toward a redefinition of the second” and could serve to “develop entirely new applications and advance scientific projects that depend on time and frequency.”