Trapped ions are one of the most advanced candidate systems for a scalable quantum processing device. The next exciting step towards this goal is to trap small ion strings in a multitude of traps and connecting them by shuttling ions between the traps. Such traps should be as small as possible allowing for compactness, large shuttling speed, and high processing speed. In this project, we develop and test novel fabrication methods to reduce electric field noise emerging from the trap electrodes as this noise leads to heating of the ion motion and strongly interfers with the most popular quantum gates for trapped ions.
In order to attack this problem, we combine an ion trap set-up with analytical and surface cleaning tools. Parallel, we are working on optimal control to make quantum algorithms more robust against noise sources. Ultimately, our goal is to implement Shor's algorithm and quantum error correction in a fully scalable ion-trap architecture.
For this project, we strongly collaborate with the ion trap groups at University of Innsbruck, MIT, and University of Mainz. This project is supported by the IARPA grant "Scalable Quantum Information Processing with Trapped Ions".