The laser beam traveled 3.6 kilometers (over 2 miles) via fiber optic links to NIST, where a frequency comb (acting as a “ruler for light”) allowed the aluminum ion clock’s laser to adopt its superior ...

Quantum networking is being rapidly developed world-wide. It is a key quantum technology that will enable a global quantum ...

Scientists have used a portable “atomic clock” to measure gravity for the first time. The device makes use of small changes in the flow of time at different altitudes to measure the Earth’s ...

A new, portable atomic clock was able to use gravity to take a measurement of the height of a mountain in the French Alps. (Jean-Pierre Clatot / AFP-Getty Images) By Deborah Netburn Staff Writer .

More French pendulum clock from the French region of Franch-Comte. ... Many subsequent refinements, even prior to Newton's gravity, were made to this original design. Christian Huygens, 1658.

Famously, gravity and quantum mechanics do not mix and represent a giant gap between our understanding of the macro world of humans and the quantum-governed micro world of particles.