Jakob Reichel (Professor, LKB Atom Chips) leads work on fiber Fabry-Perot microcavities for atom-light quantum interfaces and miniaturised sensors. Research: (1) fiber Fabry-Perot microcavities — sub-micron mirrors on fibre tips enabling strong single-atom coupling; integrated directly into atom chips; (2) TACC (Trapped Atom Clock on a Chip) — Rb atom clock with 5.8×10⁻¹³/√τ stability; ERC Advanced grant EQUEMI; (3) Sr optical-lattice cavity QED with quantum metrology; (4) MIREGA spinout — miniature portable greenhouse gas analyser combining FFP microcavities with telecom fibre optics for drone mounting; ERC Proof-of-Concept grant; (5) Rubidium CQED 'Sarocema' — individually addressable atom-tweezer array in fibre cavity for quantum simulation with long-range cavity-mediated interactions.