The Quantum logic spectroscopy group has succesfully applied for joint funding together with Roee Ozeri's trapped ions lab at the Weizmann Institute of Science, where we will use tailored quantum states to improve performance of optical clocks.

We have trapped the first ca ions in our new macroscopic blade trap. The ions were loaded  by laser ablation from a calcium target and subsequent multiphoton ionization.

The picture shows our new trap outside the vacuum chambre. The inset shows  the first ion crystal loaded in the trap and imaged...

The Aluminum-quantum-logic team has recently observed coherent excitation of the logic transition in a single trapped Aluminum-ion. Now also coherent excitation of the clock transition was achieved. A scan of the clock transition is shown in the picture with a linewidth of 43Hz (FWHM) for a gaussian...

Alexander Wilzewski joins the Highly Charged Ions team as a PhD student. Previously he received a Bachelor's and Master's degree from Johannes Gutenberg University at Mainz, and joined a US exchange program in 2017. We welcome him to the group!

The Sonderforschungsbereich Designed Quantum States of Matter (DQ-mat) has been renewed for another funding period of four years. For mor details see the news-article at the webpage of the SFB.

Peter Micke succesfully defends his Ph. D. thesis. We congratulate him on this achievement.

The topic of his thesis is:

‘Quantum Logic Spectroscopy of Highly Charged Ions’

The HCI collaboration has just published an article in Nature on the quantum logic spectroscopy of ⁴⁰Ar¹³⁺. Congratulations!

Abstract: Precision spectroscopy of atomic systems is an invaluable tool for the study of fundamental interactions and symmetries. Recently, highly charged ions have been...

Our team members Maximilian Zawierucha from the MANFRED team and Tabea Nordmann from the QUACCS team share the second place for the best poster during the poster-session of PTBs PhD-Day (Doktorandentag). Maximilians Poster was on 'Quantum logic for high precision molecular ion spectroscop', and...

A cryogenic radio-frequency ion trap for quantum logic spectroscopy of highly charged ions

Kai Dietze joins the multi ion calcium spectroscopy team as a PhD student. He previsously already did his masters degree with us as a joint Student of Prof. Mehlstäubler and Prof. Schmidt, and recieved his bachelor's degree from Technische Universität Braunschweig. We welcome him to the team and are...