Trapped Ion Quantum Technologies Group at Stockholm University

The group

Welcome to the Trapped Ion Quantum Technologies group led by Markus Hennrich. Our group is located at the Department of Physics at Stockholm University and is working on using trapped ions for quantum computation, quantum simulation and quantum sensing applications. In particular, we are one of only two groups worldwide that have realised trapped Rydberg ions - a promising technology for speeding up trapped ion quantum computers.

PhD position available in our group

PhD position in Experimental Quantum Sensing with Trapped Ions: The successful PhD applicant will work on novel methods for quantum sensing of electric and electromagnetic fields with trapped ions in ground and Rydberg states. Trapped ions excited to Rydberg states are a new experimental system. Here, the ions’ outermost electron is excited to a high-lying Rydberg orbital. Such Rydberg ions are million times bigger than ions in the ground state, and due to their size obtain very peculiar properties. In particular, trapped Rydberg ions have strong transition dipole moments and become highly sensitive to microwave and terahertz radiation. The experimental PhD project will take place in the Trapped Ion Quantum Technology group at Stockholm University and is supported by the Wallenberg Centre for Quantum Technology (WACQT), which receives funding from Knut & Alice Wallenberg Foundation. Closing date: 3 November 2023.

For more information, visit here or contact us via e-mail < markus.hennrich@fysik.su.se>.

Janurary 2023: Pre-print on Arxiv

Our pre-print on Single-shot measurements of phonon number states using the Autler-Townes effect has been uploaded on Arxivs: Marion Mallweger, et al., Single-shot measurements of phonon number states using the Autler-Townes effect, New J. Phys. 23, 123028 (2021), arXiv:2107.01902. In this work we introduce and demonstrate new techniques which allow us to minimize unwanted electric fields at the ions’ position fast and precisely via interferometric pulse sequences.