Researchers have shown, for the first time, that transmission of ultrastable optical signals from optical clocks across tens of kilometers of deployed multicore fiber is compatible with simultaneous ...

Researchers have shown how ultrastable optical signals from optical clocks can be transmitted across tens of kilometers of deployed multicore fiber carrying telecommunications data. Nazanin Hoghooghi, ...

A study led by the University of Oxford has identified a surprising source of entropy in quantum timekeeping—the act of measurement itself. In a study published in Physical Review Letters, scientists ...