By replacing single atoms with an entangled pair of ions, physicists in Germany have demonstrated unprecedented stability in ...

In a new study, researchers carried out the most extensive coordinated comparison of optical clocks to date by operating clocks and the links connecting them simultaneously across six countries.

Optical lattice clocks are emerging timekeeping devices based on tens of thousands of ultracold atoms trapped in an optical lattice (i.e., a grid of laser light). By oscillating between two distinct ...

A European collaboration involving clock experts from the National Physical Laboratory (NPL), the Physikalisch-Technische Bundesanstalt (PTB) and the Istituto Nazionale di Ricerca Metrologica (INRIM) ...

The way time is measured is on the edge of a historic upgrade. At the heart of this change is a new kind of atomic clock that uses light instead of microwaves. This shift means timekeeping could ...

For the first time, an optical clock has traveled to space, surviving harsh rocket launch conditions and successfully operating under the microgravity that would be experienced on a satellite. This ...

Figure 1: Schematic of an optical atomic clock where optical transitions in atoms or ions are used to stabilize the frequency of a narrow-band laser to the centre of the transition. Figure 3: ...

Researchers show that optical atomic clocks could offer a practical replacement for microwave atomic clocks as the basis of global time keeping WASHINGTON -- GPS-based navigation, communication ...

A portable optical lattice clock on a trailer has been used to measure elevation deep inside a mountain near the France-Italy border. Although this elevation measurement is not as precise as ...

WASHINGTON--(BUSINESS WIRE)--For the first time, an optical clock has traveled to space, surviving harsh rocket launch conditions and successfully operating under the microgravity that would be ...