Ultracold alkaline-earth elements (and like) e.g. strontium (ytterbium) have emerged as crucial platforms for various applications including fundamental science, optical clocks, detection of gravitation waves, dark energy and dark matter, quantum information and quantum computation. These elements have two electrons in their valence band giving rise to rich internal degrees of freedom. Existence of narrow transitions in these elements plays central role to most of the above applications, for instance, strontium has a mHz transition which is used for clock spectroscopy in optical clocks. Optical clocks have reached uncertainty and stability better than 10-18 implying that one can start to observe relativistic effects if you elevate a clock only by a cm. In our lab, we work with ultracold strontium and ytterbium atoms. In this talk I will introduce neutral optical lattice clocks with particular focus on transportable clocks. Within an EU consortium, the first transportable optical lattice based on ultracold strontium atoms was realised. This setup has achieved precision of 3×10-18. In the follow up, we have been working on more compact and field deployable setups. I will also discuss radar applications for optical clocks where we are looking to operate things in the domain of small drones and slow-moving targets. Towards the end, I will introduce the idea of going beyond standard model in search of 5th force using ultra cold atoms on table-top experiments. 

Join Zoom Meeting:

https://us06web.zoom.us/j/5081440931

Meeting ID: 508 144 0931

Seminar hosts: Neven Šantić i Matija Čulo