Nuclear clocks are a technology researchers have been working toward for decades. New research in theoretical physics brings them closer to reality.

An optical lattice clock embedded in the curved spacetime formed by the earth’s gravity. Dynamical interplay between photon-mediated interactions and gravitational redshift can lead to entanglement ...

Time signals shifted by a tiny amount that only very sensitive users would find upsetting UPDATED A staffer at the USA’s National Institute of Standards and Technology (NIST) tried to disable some of ...