PREFERRED. Freedman uses synthetic inorganic chemistry to design molecular qubits from the electron spin of paramagnetic coordination complexes (e.g. chromium-centered complexes), giving Angstrom-scale, chemically tunable control over qubit placement and coherence for quantum sensing, communication, and metrology applications, including collaborations targeting dark-matter detection and biological/materials sensing; she directs the Institute-wide Quantum@MIT initiative.
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.
Fruth is an experimentalist on LZ, the world-leading liquid-xenon dark matter experiment, and works on the detector-physics end: electron and single-photon backgrounds, calibration, and the characterisation of the anomalous low-energy events that currently limit sensitivity at the bottom of the energy spectrum. The programme is a pure exercise in pushing a detector's noise floor down until it is limited by irreducible physics (the neutrino fog). 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 — dark matter detection and NV-ensemble magnetometry are the same problem in different clothing — an exquisitely quiet detector, a signal below the background, and a systematics budget that determines everything — and the quantum-sensing community is increasingly supplying the readout technology (quantum-limited amplifiers, single-photon counters) that these experiments now need. Early-career PI.
Ivette Fuentes' group uses quantum information and metrology to probe fundamental physics at the interface of quantum theory and general relativity. Research: (1) quantum sensing of gravitational waves using relativistic quantum systems; (2) quantum clock synchronization and gravitational decoherence; (3) dark energy detection using quantum sensors; (4) quantum reference frames in curved spacetime. Bridges quantum sensing with gravitational physics.
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.
Galbiati co-leads the DarkSide/Global Argon Dark Matter Collaboration program (DarkSide-20k and successors), developing ultra-radiopure underground argon and cryogenic noble-liquid time-projection chambers for direct WIMP dark-matter detection, building on his earlier work on the Borexino solar-neutrino scintillator experiment. Included as a borderline quantum-sensing entry on the strength of the ultra-low-background, single-quantum (photon/ionization) detection technology his group has developed, which is now being adapted for other applications such as total-body PET imaging.
Galland leads LQNO at EPFL investigating light-matter interactions in nano-structures and the quantum regime. Research directions: (1) NV centers in diamond for quantum sensing — spectroscopy of NV spin states in ultra-thin diamond membranes, development of diamond nanophotonic platforms for enhanced sensing sensitivity; collaboration on quantum sensing with color centers; (2) Plasmonic nanocavities — few-nm gap junctions enhance Raman scattering by ×10^9, enabling single-molecule vibrational spectroscopy and coherent control; ultrafast and single-photon detection of coherent phonon dynamics; (3) 2D heterostructure photonics — entangled photon pair generation enhanced by TMD heterostructures; valley-polarized exciton sources; (4) Optical frequency conversion for quantum applications. SNSF-funded professor, internationally recognized for molecular optomechanics and carbon nanotube quantum optics.
Develops computational methods (DFT + many-body perturbation theory, quantum embedding) to predict properties of spin defects for quantum sensing and computing. Directions: (1) first-principles prediction of coherence properties, zero-phonon lines, and spin-photon coupling for NV, SiC divacancy, Er, and other color center platforms; (2) high-throughput screening of novel spin defect candidates in 2D materials and oxides; (3) quantum embedding methods for strongly correlated defects. Director MICCoM; NAS member; Argonne senior scientist.
Gambardella leads the Magnetism and Interface Physics group at ETH D-MATL. Research directions: (1) Scanning probe magnetometry — using NV-center cantilevers (collaboration with Degen) and magneto-optical Kerr microscopy to image spin textures (skyrmions, domain walls) in thin-film heterostructures with sub-100 nm resolution; (2) Spin-orbit torques — current-induced magnetization switching via interfacial spin-orbit coupling; spin Hall and Rashba effects for spintronic devices; (3) Single-atom magnetism — STM and X-ray absorption for element-specific orbital and spin moments of individual atoms on surfaces; (4) XMCD at synchrotron — quantitative element-specific magnetic spectroscopy. Quantum sensing angle: spin-orbit driven phenomena, high-resolution magnetic imaging.
Gangloff leads the Quantum Engineering Group at the Cavendish. Research spans three platforms: (1) Semiconductor quantum dots (InGaAs, GaAs) — demonstrating optical coherent control of quantum-dot nuclear spin ensembles (magnons, time crystals, many-body quantum registers); developing QD-based quantum repeater nodes (MEEDGARD QuantERA project); (2) Diamond group-IV spin defects (SiV, SnV, GeV) — precision positioning and high-purity single-photon generation from tin-vacancy centers; (3) Rydberg excitons in Cu₂O — exploring blockade-based optical quantum gates. The Integrated Quantum Networks Hub co-PI role underpins a broader quantum internet vision.