Goldfarb studies coherent effects in atomic vapours - EIT and slow light, spin-noise spectroscopy of spin-environment interaction, and EIT-based Rydberg-atom radio-frequency field sensing (electrometry) in warm cells. In the broader landscape of NV-centre ensemble quantum sensing (DEER, nano-NMR, T1 relaxometry) operating near pT/sqrt(Hz) sensitivity, this work adds atomic-vapour electrometry and coherence spectroscopy.
Philippe Grangier is a pioneer of quantum optics and quantum information at the Laboratoire Charles Fabry (IOGS/École Polytechnique). Research: (1) foundations of quantum mechanics: single photon experiments, Bell tests, quantum non-demolition measurement; (2) quantum optics and quantum information — continuous variables, entanglement generation, quantum cryptography; (3) Rydberg atom experiments (in collaboration with Browaeys). Coordinator of SIRTEQ network (700+ quantum researchers in Île-de-France). Closely connected to Pasqal spinoff. Key for quantum sensing foundations.
Hogan's group studies atoms and molecules in high Rydberg states for precision measurements and quantum sensing. Research directions: (1) Rydberg atom electric field sensing — Rydberg atoms exhibit enormous electric polarizabilities; Stark-map and EIT-based electrometry with sub-mV/cm sensitivity and GHz-range frequency coverage; (2) Rydberg molecule spectroscopy — long-range Rydberg molecules as probes of intermolecular forces; (3) Stark deceleration and trapping of Rydberg atoms/molecules — producing cold samples for precision spectroscopy and scattering experiments; (4) Circular Rydberg states — extremely long-lived states for quantum information storage and sensing. Collaborates on quantum-enhanced sensing of RF/microwave fields.
Pfau's institute spans dipolar quantum gases (first Dy BEC, supersolids), interacting Rydberg atoms for simulation/computing, Rydberg electrometry with thermal atomic vapours and integrated atomic photonics, and laser cooling of molecules. Rydberg vapour electrometry is a leading electric-field quantum sensor. In the broader landscape of NV-centre ensemble quantum sensing (DEER, nano-NMR, T1 relaxometry) operating near pT/sqrt(Hz) sensitivity, this work complements spin sensing with atom-based electric-field metrology.
Romalis develops ultra-sensitive alkali-vapor magnetometers operating in the spin-exchange-relaxation-free (SERF) regime, K-noble-gas nuclear spin co-magnetometers used as gyroscopes and for electron/nuclear EDM and Lorentz-violation searches, and Rydberg-atom microwave electric-field sensors; his group's SERF magnetometers were the first used to detect brain magnetic fields. This continues and extends the historical arc of atomic and NV-ensemble quantum sensing (comparable in spirit to DEER/NMR/T1-relaxometry approaches reaching pT/sqrt(Hz) sensitivities), pushing scalar and vector magnetometry toward the fT/sqrt(Hz) and below regime through spin-squeezing and multi-pass optical cells.