Strontium ions (blue) confined in a Paul trap
Sum-frequency generation @ 620nm
Linear Paul trap
Reference cavity for qubit laser
Reference cavity for qubit laser
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.
We have submitted our manuscript Fabian Pokorny, Chi Zhang, Gerard Higgins and Markus Hennrich, Magic trapping of a Rydberg ion with a diminished static polarizability, arXiv:2005.12422.
In this work we report the realization of a microwave-dressed Rydberg states with vanishing polarizability. In this way, we make the Rydberg ion insensitive to low-frequency electric fields. This allows us to achieve magic trapping of a Rydberg system for the first time. We demonstrate Rabi oscillations between a low-lying electronic state and the magically trapped Rydberg state.
Today, our paper Chi Zhang, et al., "Sub-microsecond entangling gate between trapped ions via Rydberg interaction" has been published in Nature (Nature 580, 345 (2020), arXiv:1908.11284.).
