Integrated microwave to optical conversion on a superconducting atom chip

The goal of this project is to pave the way for long-distance quantum communications between superconducting quantum (sub)processors with optical photons. We shall develop integrated chips for the conversion between microwave and optical photons using ultracold atomic ensembles. The hybrid chip developed in this project, with atoms simultaneously interacting with microwave and optical cavity fields, could be connected to superconducting quantum processors and fiber optical communication networks for realizing coherent links between distant computational nodes. Our project will demonstrate experimental techniques for microwave to optical conversion that are integrable on chips. We will fabricate planar superconducting cavities as well as integrated optical waveguides and cavities. After separate evaluation and benchmarking of the optical and microwave components in dedicated cold atom experiments, we will fabricate hybrid chips that combine both. The final goal of the project is to evaluate the operation and optimal design of a superconducting atom chip with integrated microwave and optical cavities for the coherent transduction of photons. This project combines the expertise of five groups (Tübingen – UT, Bordeaux – LP2N, Budapest – WRCP, Turin – INRIM, Heraklion – FORTH) of experimental and theoretical physics, from five European countries: Germany, France, Hungary, Italy and Greece. The project will contribute to scientific excellence, competitiveness and leadership in the broad field of Quantum technologies at European level.



  • Coordinator: József Fortágh (University of Tübingen, DE)
  • Simon Bernon (Institut d’Optique Graduate School, FR)
  • David Petrosyan (Foundation for Research and Technology-Hellas, GR)
  • Peter Domokos (Wigner Research Centre for Physics, HU)
  • Natascia De Leo (Istituto Nazionale di Ricerca Metrologica, IT)


Call year

Call 2021

Call topic

Quantum Phenomena and Resources

Area of research

Quantum information sciences

Start date

May 2022


36 months

Funding support

€ 865 715

Project status

In Progress