Rubidium-based atomic clocks are less accurate than caesium or hydrogen ones, but can more easily be miniaturised. Kim says other research groups are working on similarly small atomic clock ...

(Courtesy: Hummon/NIST) A tiny optical clock that is small enough to fit ... high frequency that the caesium transition at 9 GHz. An infrared “clock laser” is locked to the rubidium transition. Two ...

Described in Optica, the chip-scale clock is based on the vibrations, or "ticks," of rubidium atoms confined in a tiny glass container, called a vapor cell, on a chip. Two frequency combs on chips ...

However, if you want real precision, you need something either better than a crystal or something that will correct for tiny errors ... discipline from the rubidium clock.

In 2015, Chinese scientists developed a rubidium clock that is tiny enough to fit in the palm of your hand but was almost 40 millimeters thick. The new clock, with a length of 76 millimeters and width ...

a chip-scale optical clock was also proposed and demonstrated with better frequency stability and accuracy, which is mainly based on two-photon transition of Rubidium atom ensemble. However ...

In this case, researchers gave rubidium atoms a ... “Atomic clocks are exceptionally sensitive to temperature changes, which can cause small errors in their measurements,” said NIST research ...

However, if you want real precision, you need something either better than a crystal or something that will correct for tiny errors ... discipline from the rubidium clock.