Rubidium atoms can exist in three states ... We’ve seen this done before, of course. Cesium is even more precise, but there are things still better than that.

Researchers at the University of California San Diego have been able to explain how adding small amounts of cesium or rubidium salt to perovskite-based solar cells can increase performance by ...

Maybe that’s even more than half of the fun. [CuriousMarc] got an HP 5061A Cesium clock, a somewhat famous instrument as the model that attempted to prove the theory of relativity. The reason?

A study in Nature Physics has realized a dual-species Rydberg array combining rubidium (Rb) and cesium (Cs) atoms to enhance ...