A trapped cloud of ultracold atoms, colder than almost anything found in nature, has become the setting for a deceptively ...

Physicists want to use ultracold gases in space to measure the Earth's gravitational field, to subject Einstein's Equivalence Principle to an accurate test, and also to detect gravitational waves. The ...

In a quantum experiment, scientists observed photons spending ‘negative time’ in a cloud of rubidium atoms. This is likely caused by the fact that photons move faster when exciting these atoms than ...

A study led by Russia’s Skoltech and China’s HPSTAR suggests that rubidium and cesium additives could improve the efficiency of hydrogen batteries. Researcher Dmitrii Semenok tells pv magazine that ...

(Nanowerk News) Albert Einstein tells us that clocks run slower the deeper they are in the gravitational potential well of a mass – the closer they are to a heavenly body, for example. This effect is ...