Cassidy (formerly Microsoft/Sydney) builds hybrid superconductor-semiconductor quantum devices and the microwave measurement chains needed to read them out: dispersive gate sensing, superconducting resonators coupled to semiconductor nanostructures, and quantum-limited parametric amplification. The programme sits at the boundary between quantum computing hardware and quantum sensing — many of the same circuits used to read a qubit are, viewed differently, near-quantum-limited detectors of microwave photons or of charge. 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 — a superconducting-resonator readout chain with a quantum-limited amplifier is the leading route to inductively-detected spin resonance at sensitivities well below the pT/sqrt(Hz) regime accessible to optical NV ensembles, and Cassidy's group has the full stack of skills required. Mid-career, actively building; good autonomy for a postdoc.
Chaudhuri leads the Princeton Axion Search (PXS) and is a core contributor to the DMRadio program, using solenoidal lumped-element LC resonators, DC-SQUID and near-quantum-limited (traveling-wave parametric amplifier) readout to search for QCD axion dark matter from roughly neV to ueV masses; his group explicitly frames this as electromagnetic quantum sensing beyond the Standard Quantum Limit. He is actively developing superconducting resonators and RF quantum upconverters that push readout sensitivity toward and below the SQL.
Cherroret develops the theory of multiple light scattering, Anderson localization, and quantum-fluid-of-light phenomena in disordered polariton/photonic systems, supporting the experimental polariton-fluid programme led by Alberto Bramati's team.
Chu leads the Hybrid Quantum Systems Group coupling mechanical resonators to superconducting circuits and diamond color centers. Research directions: (1) Circuit quantum acousto-dynamics (cQAD) — HBAR resonators coupled to transmon qubits achieve single-phonon nonlinearity (coherence/anharmonicity ratio 6.8), mechanical qubit gates demonstrated (arXiv 2406.07360, 2024); (2) Optimal control for high Fock state preparation in bulk resonators; (3) Ultra-cold mechanical quantum sensor — cryogenically cooled nanomechanical oscillators as probes for new physics beyond the standard model; (4) Coupling NV/SiV color centers in diamond to acoustic waves for hybrid quantum memory and transduction. Targets long-lived phonon storage for quantum networking and quantum sensing beyond the standard quantum limit.
Alex Clark's group works at the interface of quantum science and technology, focusing on: (1) quantum imaging with undetected photons (mid-IR sensing at 3.28 µm using CMOS cameras and entangled photons — QIUP technique); (2) single-molecule photon sources (molecules coupled to nanophotonic cavities); (3) quantum memory protocols (ORCA and ATS in atomic vapours for telecom-band photon storage); (4) integrated photonics for quantum sensing. Director of QET Labs; Work Package Leader in three UK Quantum Technology Hubs.
Rachel Clark's research focuses on integrated quantum photonic devices, squeezed light generation on-chip, and nonlinear photonics. Research: (1) on-chip squeezed light generation in silicon nitride and lithium niobate waveguide platforms; (2) continuous-variable quantum photonic circuits; (3) nonlinear photonics for quantum sensing. This group is directly relevant to quantum-enhanced sensing with squeezed light.
Specializes in quantum information and hybrid quantum systems. Directions: (1) superconducting qubit quantum computing and error correction; (2) hybrid quantum systems coupling superconducting qubits to mechanical resonators, spin systems, and optical photons; (3) quantum-limited microwave amplification; (4) co-PI DARPA QuSeN — quantum sensing of neutrinos via phonon-coupled SC qubit sensors (2025). Director Pritzker Nanofabrication Facility (PNF). AAAS and APS Fellow.
Theorist developing frameworks for quantum sensing, control, and amplification in driven-dissipative quantum systems. Directions: (1) quantum noise theory for optomechanical and electromechanical sensors — fundamental limits and backaction evasion; (2) parametric amplification and squeezing beyond standard quantum limit; (3) non-reciprocal quantum systems for quantum-limited amplifiers; (4) quantum sensing theory for GW detectors and CMB experiments. 2020 Simons Investigator in Theoretical Physics.
Cohadon and Heidmann co-lead the Optomechanics and Quantum Measurements group at LKB. Research directions: (1) Back-action evasion and Standard Quantum Limit (SQL) — early demonstration of radiation-pressure back-action in a micro-mirror (Nature 2006), subsequent beating of SQL via quantum correlations; (2) Micro/nanomechanical resonators — 2D photonic crystal deformable slabs, membrane-in-the-middle cavities, micropillar resonators for radiation-pressure optomechanics; (3) Superconducting qubit–macroscopic membrane coupling — Jacqmin & Deléglise team: resonant coupling of transmon qubit to MHz membrane oscillator, tracking quantum motion with 300 repeated interactions (2025); high-impedance hyperinductors for electromechanics; (4) Gravitational wave detector contributions — VIRGO/LIGO data analysis and quantum noise modeling. Applications include back-action-evading force sensing and tests of quantum mechanics at macroscopic scales.
Pierre-François Cohadon leads the optomechanics and quantum measurements group at LKB (ENS site). Research: (1) mechanical quantum systems and back-action-evading measurement; (2) gravitational wave detector enhancement — white-light cavity proposals to extend GW sensitivity; (3) quantum optomechanical sensing of forces and fields. The group was key to the LKB optomechanics tradition and is affiliated with Virgo/LIGO enhancement proposals.