We develop methods for the application of trapped Rydberg ions in quantum information processing experiments (see review paper). Trapped Rydberg ions feature several important properties that are unique in their combination: Ions in a Paul trap are tightly bound in a harmonic potential, in which their internal and external degrees of freedom can be controlled in a precise fashion (see here). High fidelity state preparation of both internal and motional states of the ions has been demonstrated, and the internal states have been employed to store and manipulate qubit information, see our Quantum Computing project.
But additionally to regular trapped ions, Rydberg states come with strong dipolar interactions, a high polarizability and all this may be used to explore many-body effects. We reported the first excitation of trapped ions to their Rydberg states (see PRL2015 and PRL2021). By laser coupling to Rydberg states, the polarisability of the ions can be both enhanced and tuned (see NJP 2023) for plaquette interactions (NJP2015). Excitation to Rydberg state may present an attractive alternative for fast entangling operations for a future quantum computer or a quantum simulator (see PRL2019).
We have fruitful collaborations with the research groups of
ERyQSenS, QuantERA project on Entangled Rydberg matter for quantum sensing and simulations, in collaboration with Marcus Hennrich, Stockholm , Nikolay V. Vitanov, Bulgaria , Jean Michel Raimond, Paris, Michel Brune, Paris , Igor Lesanovsky, Tübingen/Nottingham and Weibin Li, Nottingham .
This research has received funding from the EU's Horizon 2020 research and innovation programme under grant agreement No. 640378 (RYSC) and is funded by Marie-Skłodowska-Curie grant agreement No. 796866 (Rydion).
Dr. Han Bao
Dr. Jonas Vogel
Prof. Ferdinand Schmidt-Kaler
We offer BAC, Master, PhD, Postdoc projects in the project! Work focuses on new aspects of Rydberg physics, entanglement operations, possibly setting up a cryogenic trap for enhanced lifetimes. This offers unique opportunities for doing experiments with trapped ions and gaining visibility in high rank collaborations. Requests for further information and applications can be directly sent via email to Prof. Schmidt-Kaler.