A new field of research is emerging at the intersection of fast electron beam physics and quantum coherence: quantum optics with fast electrons. The FreeQCC project aims to address two fundamental questions: Is it possible to entangle a fast electron with a photon? And can quantum superpositions of atomic states be observed using a fast electron?
To tackle these challenges, the project builds on recent advances in electron microscopy and nano-optics, with the goal of designing novel experiments combining ultra-high spatial, temporal, and energy resolution. The aim is to precisely manipulate the quantum state of free electrons interacting coherently with nanoscale quantum systems, such as solid-state qubits. By combining theoretical work and technological innovation, FreeQCC aspires to make a major breakthrough in our understanding of the interaction between fast electrons and quantum-coherent systems.
We have been awarded an ERC advanced Grant (FreeQCC) to be started early 2026. We will be hiring PhDs and Post-docs, so if you are interested, stay tuned!