Keeping track of time seems simple. A watch ticks, a pendulum swings, and a calendar flips. But at the quantum level, marking time is far more complicated — and far more expensive than anyone expected ...

Multisource CTS represents a new clock-distribution technology that fills the methodology gap between conventional CTS and pure clock mesh. Whereas pure clock mesh delivers the best possible clock ...

Optical atomic clocks can increase the precision of time and geographic position a thousandfold in our mobile phones, computers, and GPS systems. However, they are currently too large and complex to ...