The LKB atom interferometry group (also at SYRTE, Observatoire de Paris) develops cold atom inertial sensors including the world's best gyroscopes and gravimeters. Key research (Geiger, Landragin et al.): (1) interleaved cold atom gyroscope with 3.75 Hz sampling and 800ms interrogation (record sensitivity); (2) cold atom gradiometer for gravity gradient mapping; (3) atom chip-based compact sources for inertial navigation; (4) quantum optimal control for robust matter-wave sensing. QAFCA project (PEPR Quantique) on quantum sensors for geoscience and navigation. Note: The main PI is Remi Geiger (CNRS) / Arnaud Landragin, both at SYRTE/Observatoire de Paris (PSL), but LKB atom interferometry team is at ENS site.

Bretenaker (former LuMIn director) works on laser physics and quantum optics: sub-shot-noise sensing with phase-sensitive-amplifier-generated entangled beams, spin-noise spectroscopy in atomic vapours, EIT slow light, and quantum-limited passive resonant (fiber/bulk) gyroscopes with Thales. In the broader landscape of NV-centre ensemble quantum sensing (DEER, nano-NMR, T1 relaxometry) operating near pT/sqrt(Hz) sensitivity, this work represents the fundamental-light and quantum-limited-rotation-sensing side.

Develops quantum sensors based on neutral atoms and solid-state atom-like defects (e.g. NV diamond) for measuring inertial forces, magnetic fields, and time, and applies nanophotonics/nanofabrication to improve the size, weight, and performance of quantum sensing instruments; collaborates with Mikhail Kats on metasurface-enhanced atomic magnetometers.

Cotter leads the Quantum Navigation research stream at Imperial's Centre for Cold Matter. He develops compact, fieldable cold-atom inertial sensors for GPS-denied navigation. Milestones: first demonstration of a cold-atom accelerometer on the London Underground (measuring acceleration/vibration in a real transit environment); successful field trials of quantum inertial sensors aboard the Royal Navy research ship XV Patrick Blackett (2023); Arctic field trials with Royal Navy (2025). His sensors use magnetically launched cold-atom Rb clouds and simultaneous multi-axis interferometry. He also contributes to AION-related atom interferometry work and the Quantum Technology Hub in Sensors and Timing. Department of Materials cross-appointment.

Digonnet's group develops high-sensitivity fiber-optic sensors, especially resonant and interferometric fiber-optic gyroscopes engineered to approach fundamental (shot-noise/quantum) rotation-sensing limits, alongside specialty fiber lasers and amplifiers.

Foot leads the Ultracold Quantum Matter group and is one of the two Oxford physics PIs co-leading the AION project at Oxford. His group develops laser-cooled strontium atom sources with the ultranarrow Sr-87 clock transition for large-scale single-photon atom interferometry. Near-term goals include the AION-10, a 10-m baseline vertical atom interferometer currently under construction in the Beecroft Building stairwell, targeting dark matter searches and mid-band gravitational wave detection. Foot's group also studies non-equilibrium 2D quantum gas physics (BKT transition, vortex dynamics) using matter-wave interferometry. AION is linked to MAGIS-100 at Fermilab.

Tim Freegarde's Quantum Control group develops atom interferometric sensors and matter-wave optics. Research: (1) optimal Raman pulse design for cold atom inertial sensors — geometric approach to π-pulse optimisation and robust control; (2) matter-wave interferometric velocimetry of cold atom clouds; (3) point-source interferometry for real-time scale-factor calibration of cold atom gyroscopes; (4) large-area atom interferometry. Part of the UK Quantum Technology Hub in Sensors and Metrology. Director of the CDT in Quantum Technology Engineering.

Rémi Geiger (CNRS DR, SYRTE/Observatoire de Paris; IUF 2020) leads atom interferometry for inertial sensing. Research: (1) interleaved cold-atom gyroscope — world record 3.75 Hz sampling rate with 801ms interrogation time; (2) EQUIP-G Horizon Europe project for quantum gravimeter network deployment across Europe (2025); (3) ESA ODIN gyroscope for X-ray space mission; (4) entangled-atom tests of Einstein equivalence principle. Key figure in precision cold-atom inertial sensors. Note: formally at SYRTE (PSL/Obs. Paris), entered under ENS (same PSL network).

The Geraci group employs high-Q resonant sensors for ultra-sensitive force and field detection in searches for new physics beyond the Standard Model. Key thrusts: (1) Optically-trapped levitated dielectric nanospheres and microspheres achieving zeptonewton (10⁻²¹ N) force sensitivity, applied to probing short-range deviations from Newtonian gravity at micrometer scales; (2) ARIADNE, an international NMR-based experiment using superfluid ³He to search for the QCD axion via axion-mediated spin-dependent forces between a rotating mass and polarized nuclei; (3) Collaboration on MAGIS-100, the 100 m-tall atom interferometer at Fermilab for gravitational wave detection in the mid-band (0.3–10 Hz) and ultralight dark matter searches; (4) Cryogenic optical cavity dark matter comparisons with Gabrielse and Kovachy groups. Member of CFP Northwestern and CIERA. APS Francis M. Pipkin Award 2023.

Gratta's group works at the interface of atomic and particle physics, developing cold-atom interferometric gravimeters and gradiometers for tests of gravity alongside searches for neutrinoless double-beta decay using liquid-xenon TPCs (EXO-200/nEXO), spanning quantum sensing hardware and rare-event particle detection.