Kolthammer works on quantum photonics with an emphasis on nonclassical states of light and their applications to quantum information and sensing. Research highlights: (1) Gaussian Boson Sampling — first time-bin encoded GBS experiment using a loop-based interferometer with superconducting TES photon-number-resolving detectors, demonstrated enhancement in dense-subgraph search over classical methods (PRX 2022); (2) Squeezed state characterisation — nonclassicality certification using multiplexing layouts with superconducting TES detectors, sub-Poisson and sub-binomial statistics (PRA 2017); (3) Frequency-multiplexed photon pair sources — electro-optic frequency shifting for indistinguishable single-photon multiplexing without added multi-photon events; (4) Photonic quantum sensing — developing time-bin encoded platforms for quantum-enhanced sensing and quantum advantage demonstrations.

Kuhn leads the Atom-Photon Connection group, working at the single-atom, single-photon level. Key research thrusts: (1) deterministic generation of indistinguishable single photons from single atoms in high-finesse cavities, with cluster-state production for one-way quantum computing; (2) development of integrated fibre-tip microcavities with small radius-of-curvature for >50% photon capture efficiency and direct fibre coupling; (3) single-photon quantum memories using cavity-coupled atom systems; and (4) optical trapping of single atoms in the Lamb-Dicke regime for quantum simulation and networking. The group uses reinforcement learning for optimal quantum control of atom-cavity systems.

Prof. Kumar's group spans classical and quantum optics across three inter-related areas: (1) Quantum Fiber Optics — generation and distribution of entanglement (photon-pair, multi-photon) over fiber networks, quantum key distribution, and first-ever quantum teleportation over active internet-carrying fiber; (2) Nonlinear Quantum Optics — squeezed light and twin-beam (two-mode squeezed) state generation via fiber-based four-wave mixing and χ⁽²⁾ processes, with applications to sub-shot-noise interferometry, quantum-enhanced imaging, and quantum communication; (3) Photon-entanglement-enhanced precision measurement and optical communications. AT&T Professor of Information Technology; INQUIRE Executive Committee member.

Pioneer of experimental quantum optics with entangled and hyper-entangled photons; research spans quantum information processing, quantum communication, quantum-enhanced metrology and sensing, and fundamental tests of quantum mechanics using single- and entangled-photon sources.

Thierry Lahaye (CNRS DR, LCF/IOGS) co-leads the quantum optics atoms group with Browaeys and Ferrier-Barbut. Research: (1) Rydberg atom tweezer arrays for quantum simulation of many-body spin Hamiltonians; (2) dipole-dipole interaction physics with Rydberg atoms; (3) cryogenic tweezer arrays (2000-site rearrangement at 4K, PRApplied 2024). Key architect of Pasqal's quantum computing platform.

Anthony Laing's group pioneers photonic quantum computing and quantum simulation, having invented integrated quantum photonics. Research: (1) universal reconfigurable photonic quantum processors; (2) photonic quantum simulation for chemistry and materials science; (3) photonic quantum sensing using multi-photon interference on chip. Founded PsiQuantum co-founder and Quantum in the Summer school.

Lakhwani runs the Molecular Photophysics Group and is a chief investigator in ARC Exciton Science. The group works on strong light-matter coupling in organic semiconductors: forming exciton-polaritons in microcavities, driving them toward polariton lasing and condensation with electrically injected devices, and engineering host-guest energy funnelling to lower thresholds. A second thread is chiroptical spectroscopy — circular dichroism and circularly polarised luminescence of chiral organic films — which is a polarisation-resolved measurement of a very small differential signal. 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 — polaritonic quantum matter is a distinct route to non-classical states of light at room temperature, in contrast to the cryogenic or spin-based platforms that dominate pT/sqrt(Hz)-class sensing; the differential chiroptical measurements the group performs are, methodologically, small-signal detection problems of exactly the same type.

Laurat leads the Quantum Networks team at LKB, developing quantum memories and atom-photon interfaces for quantum network applications. Research directions: (1) High-efficiency cold-atom quantum memories — DLCZ-protocol and AFC memories for telecom photons; demonstrating >90% efficiency and multimode operation; quantum cryptography integrating optical quantum memory (arXiv Mar 2025); (2) Waveguide QED — cold atoms coupled to nanofibers and nanophotonic waveguides for super-radiance, photon-bound states, and atom-photon gates; (3) Quantum network protocols — entanglement distribution, quantum repeater segments; part of European Quantum Flagship 'Quantum Internet Alliance'; (4) Hybrid entanglement — continuous-variable and discrete-variable hybrid entanglement for CHSH Bell tests (PRA 2024). Senior IUF member.

Julien Laurat's quantum networks group develops atomic interfaces for long-distance quantum communication and sensing. Research: (1) cold atom quantum memory using DLCZ-protocol and EIT — multi-mode storage, entanglement generation; (2) nanofibre-trapped atom light interface for quantum networks; (3) quantum memory for telecom-band photons using rare-earth crystals. CNRS Silver Medal 2026. ERC Consolidator grant. Highly relevant to quantum sensing via atomic sensors and quantum network nodes.

Lauret studies quantum light from low-dimensional materials - room-temperature single-photon emission from carbon nanotubes and defects in hexagonal boron nitride, coupled to photonic/plasmonic structures - a fundamental-photon and quantum-emitter platform. In the broader landscape of NV-centre ensemble quantum sensing (DEER, nano-NMR, T1 relaxometry) operating near pT/sqrt(Hz) sensitivity, this work provides solid-state single-photon sources adjacent to spin-defect sensing.