However, if you want real precision, you need something either better than a crystal or something that will correct for tiny errors ... discipline from the rubidium clock.

In a quantum experiment, scientists observed photons spending ‘negative time’ in a cloud of rubidium atoms ... govern that world of the incredibly small are somewhat counterintuitive to ...

However, if you want real precision, you need something either better than a crystal or something that will correct for tiny errors ... discipline from the rubidium clock.