Quidant leads the Nanophotonic Systems Laboratory, developing hybrid integrated levitation platforms combining optical and RF fields. Research directions: (1) Measurement-free coherent optical feedback cooling of levitated nanoparticles (PRL 2025, phonon occupations ~100s); (2) Quantum sensing applications — ultra-sensitive force/acceleration sensing, directional dark matter detection with levitated sensors; (3) Meta-atom levitation — Mie-resonance high-permittivity particles in optical traps for extreme light-matter interaction; (4) Optofluidics — structured light for photothermal fluid control; (5) Cancer phototherapy — photothermal nanoparticle applications. Pioneer in nanoplasmonic tweezers, thermoplasmonics, and on-chip biosensing. Key co-author of Science levitodynamics review (2021).

Quiney (currently Head of School) is a theorist of coherent imaging and relativistic atomic structure. His signature contribution is the theory of X-ray free-electron-laser imaging of single particles, including the modelling of radiation damage and ionisation dynamics during the pulse — the question of whether you can extract structure faster than you destroy it — plus phase-retrieval algorithms for coherent diffractive imaging and ptychography. He also works on relativistic quantum chemistry and atomic structure. 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 — the connection is methodological rather than physical: his group develops the inverse-problem and photon-budget theory that governs how much information can be pulled out of a shot-noise-limited measurement, which is the same limit that fixes pT/sqrt(Hz) performance in NV ensembles. Theory-first PI with strong coupling to experimental synchrotron/XFEL programmes.

Rahman does large-scale atomistic modelling of semiconductor quantum devices: tight-binding and DFT calculations of donor and quantum-dot wavefunctions, valley physics, spin-orbit coupling, hyperfine interactions and the response of all of these to strain and electric field, at system sizes large enough to represent a real device. The group works hand-in-glove with the Morello, Dzurak, Simmons and Rogge experiments, and increasingly uses machine learning to invert measurements into structural information. 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 — the same first-principles machinery is what predicts the hyperfine and spin-bath environment that determines T2 — and therefore the achievable pT/sqrt(Hz) sensitivity — of any solid-state spin sensor, including NV. Computational PI; would suit a candidate wanting a theory/experiment bridge role.

Unnithan runs a sensor-engineering group spanning plasmonic colour filters and metasurface-based CMOS image and spectral sensors, thermal/hyperspectral cameras, machine learning on sensor data, and — the relevant thread here — the engineering and packaging of quantum diamond magnetometers, in a joint programme with the Melbourne physics groups and Phasor Innovation aimed at navigation, subsurface sensing and eventual healthcare use. He has extensive industry links (Hort-Eye, KDH) and an entrepreneurial orientation. 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 role in that collaboration is on the readout, optics and integration side rather than the spin physics, i.e. turning a laboratory pT/sqrt(Hz) NV ensemble into a fielded instrument. Caveat against the stated preference: this group is substantially device-fabrication and product-oriented rather than sensitivity-limited fundamental measurement.

John Rarity's group works on quantum-enhanced measurements and free-space quantum key distribution. Research: (1) quantum imaging with undetected photons — mid-infrared gas sensing (CO2, CH4) exploiting entangled photon pairs, with only near-IR photons detected (startup QLM); (2) sub-shot-noise imaging using quantum-identical photon beams; (3) spin-photon interfaces (1D cavity with near-unit scattering efficiency); (4) compact satellite QKD transmitters (EPSRC Quantum Comms Hub). Highly relevant to quantum-enhanced sensing.

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.

Reilly's Quantum Nanoscience Laboratory works on the interface between quantum devices and the classical control hardware needed to run them at scale — custom VLSI CMOS operating below 100 mK, high-bandwidth dispersive readout, and cryogenic microwave engineering — a programme built up during his long association with Microsoft's quantum effort. A distinct and directly relevant second thread is the manipulation of spin states in nanoparticles for new imaging modalities in medicine: hyperpolarisation and spin-state engineering of nanoparticle contrast agents, which is quantum control applied to MRI. 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 — the cryo-CMOS readout chain he builds is exactly the enabling technology that would let a pT/sqrt(Hz) spin-ensemble sensor be multiplexed into an array rather than run one channel at a time; and the nanoparticle-MRI thread is an independent route into biological spin sensing. Large group, strong engineering culture, significant industry entanglement.

Rentschler's group synthesizes and characterizes molecular magnetic materials: single-molecule magnets, spin-crossover complexes and polynuclear coordination clusters, with magnetic anisotropy engineered through ligand-field design and characterized by SQUID magnetometry, EPR and ab-initio calculations. The overlap with this search is the molecular-qubit angle -- these are the same chemical objects being pursued elsewhere as optically or electrically addressable spin qubits and as molecular quantum sensors. Relative to the established NV-ensemble quantum-sensing playbook (DEER, nanoscale NMR, T1 relaxometry at pT/sqrt(Hz) ensemble sensitivity), the value here is chemical: designed spin systems with tunable coherence and anisotropy, rather than defects in a host crystal. Borderline-strong inclusion; the group is chemistry-first, so a physicist postdoc would bring the spin-readout side.

Renzoni's group is internationally recognized as a pioneer in electromagnetic induction imaging (EMI) with optical atomic magnetometers. Research directions: (1) All-optical 87Rb atomic magnetometer MIT — demonstrated first magnetic induction tomography (MIT) with atomic magnetometers (2013), first EMI of biological tissues below the 1 Sm⁻¹ threshold (Applied Physics Letters 2020), enabling non-invasive cardiac conductivity imaging; (2) Unshielded RF atomic magnetometer operation with general regression neural network auto-optimization; (3) Non-destructive evaluation — industrial corrosion/defect imaging via quantum-sensitive MIT; (4) Sub-Fourier signal processing with nonlinear systems for frequency resolution beyond classical limits. Collaborates with NPL on quantum sensing standards. Applications span medicine (atrial fibrillation), security, and materials inspection.

Jean-François Roch (Professor at ENS Paris-Saclay, LuMIn) is a world leader in NV-center diamond quantum sensors. Research: (1) NV center magnetometry — scalar and vector magnetic field sensing with ensembles and single NV spins; (2) NV centers in diamond anvil cells for high-pressure magnetometry (world record 240 GPa); (3) joint laboratory (JRL) with Thales R&T on industrial NV quantum sensors; (4) color centres in hBN. IUF Senior Member 2021; Jaffé Prize + Berthelot Medal 2024.