Quantum timekeeping
Physicists are exploring the mind-blowing possibilities of linking a new generation of atomic clocks
QUANTUM TIMEKEEPING Atomic clocks are so precise that physicists can measure time to the quintillionth (10-18) of a second with confidence. An entangled clock could do even better.
S. Egts
The best clock in the world has no hands, no pendulum, no face or digital display.