from Hacker News

Unprecedented optical clock network lays groundwork for redefining the second

by wglb on 6/13/25, 12:03 AM with 13 comments

  • by wglb on 6/13/25, 12:03 AM

  • by zokier on 6/16/25, 8:51 AM

    I would have thought that the frequencies (or their ratios) of atomic clocks could be calculated somehow from the fundamental physics. Like somehow the energy levels of electron shells could be determined from the configuration of the nucleus (how many protons/neutrons it has), and from that the transition frequency could be calculated. But apparently that is not the case. I guess the number of particles in these atoms is way too high for computing with our current quantum models?
  • by ludicrousdispla on 6/16/25, 6:54 AM

    ... a man with one clock knows what time it is, but a man with two can never be sure.