Atomic clocks and the nature of time: Insights from Ö1’s radio show Punkt eins

27.03.2025

In a special edition of Ö1’s radio show Punkt eins titled "Der Quantensprung oder: Was ist Zeit?", listeners were taken deep into the fascinating world of time measurement and quantum physics. Prof. Thorsten Schumm, head of our research team P5, discussed their groundbreaking advances in atomic clock research.

Timed with the upcoming daylight savings adjustment, the show explored fundamental questions about the nature of time and its precise measurement. Thorsten Schumm detailed the recent scientific breakthrough achieved at TU Wien: the development of the world’s first atomic nucleus clock, based on a unique transition in the Thorium-229 isotope. Years of work with specially grown thorium crystals and advanced laser techniques enabled researchers to access and control the atomic nucleus' energy states — a feat long considered nearly impossible.

The new generation of clocks, even more precise than traditional atomic clocks, promises to open up unprecedented possibilities, from detecting minute variations in gravitational fields to probing the constancy of fundamental physical laws. By refining time measurement to an extraordinary degree, researchers aim to not only revolutionize technologies like GPS and quantum networks but also deepen our understanding of the universe itself.

More information about the show can be found here. Or you can download parts of the show right here and enjoy it!

An image of a clock with colorful highlights surrounding it.