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.

Flambaum is one of the most cited atomic theorists alive and the intellectual source of a large fraction of the modern precision-AMO new-physics programme. His group computes the atomic and molecular structure factors that convert an experimental frequency shift into a bound on new physics: enhancement factors for electron and nuclear EDMs, atomic parity violation, the sensitivity of clock transitions to variation of the fine-structure constant, and — most relevant to quantum sensing — the response of atomic clocks, magnetometers and comagnetometers to ultralight/axion-like dark matter fields. He proposed much of the theory behind using networks of quantum sensors as dark matter detectors. Positioned against the established body of NV-ensemble quantum sensing work — DEER, nanoscale NMR and T1 relaxometry protocols operating at pT/sqrt(Hz) field sensitivity — his theory is what tells an experimentalist what a pT/sqrt(Hz) magnetometer or a 10^-18 clock actually constrains: without it, a spin-precession measurement is just a number. Theory group; a sensing postdoc would collaborate rather than join.

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.

Gabrielse directs Northwestern's Center for Fundamental Physics at Low Energy, where his group performs some of the most precise measurements of any single particle. Using a one-electron quantum cyclotron in a cylindrical Penning trap, his team measures the electron magnetic moment (g-factor) to sub-part-per-trillion precision, providing the most stringent test of quantum electrodynamics and the Standard Model. A parallel effort (ACME) searches for the electron's electric dipole moment using a cold beam of ThO molecules, and a new cavity-based dark-matter search and antihydrogen/antiproton precision-measurement program are underway. This is precision quantum sensing of fundamental constants rather than sensing of an external field, but it shares with NV-ensemble magnetometry the goal of pushing measurement sensitivity toward the quantum limit through improved back-action evasion.

NON-PREFERRED (borderline precision-measurement pivot, kept for review). Garcia Ruiz develops precision laser spectroscopy of atoms and molecules built from short-lived radioactive nuclei (at CERN-ISOLDE and the new FRIB facility) to measure nuclear charge radii, moments, and to search for symmetry-violating effects (parity/time-reversal violation) analogous to eEDM searches; it is fundamental precision measurement rather than a deployable quantum sensor, but shares techniques and motivation with the eEDM/precision-AMO quantum-sensing cluster.

Jean-Philippe Karr's trapped-ions group at LKB performs precision spectroscopy of molecular ions (HD+, H2+) to test quantum electrodynamics and determine fundamental constants. Research: (1) laser spectroscopy of HD+ molecular ions in ion traps for proton-electron mass ratio determination; (2) tests of quantum electrodynamics in simple molecular systems; (3) search for physics beyond the standard model via precision measurement. Published in Physics (April 2026) on simplest molecules testing quantum theory.

Arnaud Landragin (CNRS DR, SYRTE) is director of the cold-atom inertial sensors team and one of the world's leading experts in quantum gravimeters and gyroscopes. Research: (1) GIRAFE transportable cold-atom gravimeter for marine and airborne campaigns; (2) QAFCA project (PEPR Quantique) for gravity sensors for geoscience and navigation; (3) ESA ODIN ultra-high performance gyroscope for space. CNRS Innovation Medal 2020. Co-authored key reviews on cold-atom inertial sensors.

Lim is an Advanced Research Fellow jointly responsible for the ultracold eEDM experiment at Imperial. He contributed to demonstrating sub-Doppler laser cooling of YbF to 100 μK (PRL 2018), the first demonstration of laser cooling of a heavy polar molecule to ultracold temperatures. He now leads development of the lattice eEDM experiment, developing techniques for loading laser-cooled YbF into a 3D optical lattice for precision eEDM measurements with coherence times far exceeding those of the beam experiment.

Sauer co-leads both YbF eEDM experiments at the Centre for Cold Matter together with Tarbutt and Lim. Key contributions: magnetometry for EDM measurement (design and characterisation of precision magnetic field systems for the ultracold eEDM experiment), precision spectroscopy of heavy polar molecules (YbF, lattice eEDM), and development of spin polarisation/analysis schemes. Co-PI on STFC grants for eEDM and magnetometry. Together the group aims to probe the eEDM at the 10^−30 e·cm level — several orders of magnitude improvement over existing measurements from ACME (Harvard/Yale).

Tarbutt co-leads the Imperial eEDM experiment using YbF molecules and runs an independent molecular array quantum computing/sensing programme. Two parallel eEDM experiments: (1) Ultracold YbF beam — 2D transverse laser cooling producing 200 μK, 2×10^5 molecules/shot, eEDM sensitivity of 1.8×10^−28 e·cm/day (near shot-noise limit); (2) YbF 3D optical lattice — aiming for 10^−30 e·cm/year, requires laser cooling to μK and loading into 3D optical lattice, using novel all-optical spin polarisation and analysis. Also leads UKRI project on testing fundamental physics using arrays of ultracold molecules (CaF in optical tweezers for two-qubit molecular gates). These experiments probe CP-violation and BSM physics at PeV energy scales through precision molecular spectroscopy.