Michel Brune leads the Rydberg atoms / cavity QED group at LKB. Research: (1) circular Rydberg atoms trapped in high-finesse microwave cavities — quantum non-demolition measurement of photons, quantum state engineering; (2) fundamental quantum optics: decoherence, entanglement, quantum jumps, Schrödinger cat states; (3) quantum sensing of cavity fields with single atoms as probes. This group pioneered cavity QED experiments leading to the 2012 Nobel Prize (Haroche). Brune heads the laboratory.

Mabuchi's group studies continuous quantum measurement and feedback in cavity-QED and photonic circuit platforms, developing the theory and hardware for real-time quantum-limited monitoring and control of light-matter systems, foundational to many quantum-sensing readout schemes.