Quantum Logic Spectroscopy of Molecular Ions

Focus: 
Quantum Metrology

In this project, we plan to perform optical spectroscopy on atomic and molecular species with interesting spectroscopic features that have resisted precision spectroscopy in the past due to the lack of a suitable transition for laser cooling, state preparation and detection. By combining direct optical frequency comb spectroscopy techniques with quantum logic methods developed for quantum computation with trapped ions, we plan to perform absolute frequency metrology and coherent control of previously inaccessible many-level atoms and molecules that are trapped and have been cooled to the internal and external ground state. The versatility of this approach will allow us to study many different atomic and molecular species with the goal of improving current limits on fundamental constants and their temporal variation. We have recently achieved ground state cooling of our magnesium logic ion and are preparing direct frequency comb spectroscopy of calcium ions.

Mentor/s: 
Riehle
Mentor/s: 
Schmidt
Institution: 
PTB
Status: 
in progress
Ph.D. student: 
Wan