Skip to main content
European Commission logo print header

Entanglement and Quantum Engineering with optical Microcavities

Project description

Pioneering fibre Fabry-Perot (FFP) microcavities open new horizons in quantum engineering

Exploring, enhancing, and exploiting light-matter interactions is at the heart of research and development in many fields of physics and engineering. Fiber Fabry–Perot (FFP) cavities, a type of optical microcavity, have become a valuable tool supporting these investigations. FFPs are formed by placing micro-machined mirrors on the ends of opposing glass optical fibres. The ERC-funded EQUEMI project will harness their pioneering FFP microcavities to catapult quantum-enhanced measurement from its current proof-of-principle state to applicability in quantum engineering. Not only will they pursue scientific advances, but they will add a miniature quantum gas microscope to the experiment, supporting the project and future quantum gas research.


I propose to leverage the unique properties of optical fiber Fabry-Perot (FFP) microcavities pioneered by my group to advance the field of quantum engineering. We will take quantum-enhanced measurement from its current proof-of-principle state to a true metrological level by applying cavity-based spin squeezing to a compact atomic clock, aiming to improve the clock stability beyond one part in 10^-13 in one second. In a new experiment, we will generate multiparticle entangled states with high metrological gain by applying cavity-based entanglement schemes to alkaline earth-like atoms, the atomic species used in today’s most precise atomic clocks. In a second phase, a miniature quantum gas microscope will be added to this experiment, creating a rich new situation at the interface of quantum information, metrology, and cutting-edge quantum gas research. Finally, we will further improve the FFP microcavity technology itself to enable novel atom-light interfaces with a currently unavailable combination of strong coupling, efficient fiber coupling, and open access. This will open new horizons for light-matter interfaces not only in our experiments, but also in our partner groups working with trapped ions, diamond color centers, semiconductor quantum dots, carbon nanotubes and in quantum optomechanics.


Net EU contribution
€ 2 422 750,00
21 rue de l'ecole de medecine
75006 Paris

See on map

Ile-de-France Ile-de-France Paris
Activity type
Higher or Secondary Education Establishments
Other funding
€ 0,00

Beneficiaries (1)