Windpassinger's group works on cold neutral atoms as both a platform for fundamental light-matter physics and a deployable sensing technology. The fundamental line uses dysprosium -- the most magnetic element -- to study light propagation in dense dipolar media, where interatomic spacings fall below the optical wavelength and light-induced plus magnetic dipole-dipole interactions produce cooperative effects (superradiance, subradiance); controlled transport in optical dipole traps and microfocusing let them tune from single-atom to collective behaviour. The applied line builds ultracold-atom quantum sensors that survive outside the lab: atom interferometers and BEC sources flown in the Bremen drop tower, on sounding rockets, and on the ISS, aimed at inertial sensing, gravimetry and tests of fundamental constants under microgravity. Relative to the established NV-ensemble quantum-sensing playbook (DEER, nanoscale NMR, T1 relaxometry at pT/sqrt(Hz) ensemble sensitivity), this is the complementary 'cold and fragile but absolutely calibrated' end of the sensing spectrum; the group's real distinguishing asset for a postdoc is the space/microgravity engineering pipeline, which is rare. The group states it is continuously looking for motivated researchers and lists open positions via the PI.

Witte's group builds table-top extreme-ultraviolet sources via high-harmonic generation and combines them with coherent diffractive imaging (ptychography) to visualize 3D nanostructures, such as multilayer IC features, at resolutions well below the diffraction limit of visible light. The lab also works on lensless microscopy, photoacoustic imaging/metrology, and ultrafast electron/HHG dynamics, sitting at the interface of fundamental attosecond-adjacent light-matter physics and applied nanometrology; the group is actively hiring as it ramps up at TU Delft.

Ye's group operates the world's most precise strontium optical lattice clocks (now entanglement-enhanced), pioneered optical frequency combs and cavity-enhanced comb spectroscopy, demonstrated the thorium-229 nuclear clock transition, and studies ultracold polar molecules for precision measurement and quantum science. For context, this complements the established paradigm of NV-diamond ensemble magnetometry (Hahn-echo/DEER, nanoscale NMR, T1 relaxometry) operating near pT/√Hz sensitivity.

Tarik Yefsah's group at LKB studies strongly interacting ultracold Fermi gases. Research: (1) Fermi gas mixtures — quantum simulation of condensed matter phenomena (BCS-BEC crossover, Fermi polaron); (2) quantum gas microscope experiments imaging individual atoms in optical lattices; (3) novel quantum phases in Fermi-Hubbard systems ('fermionic waltz' publication 2026). Relevant to quantum simulation and quantum gas-based sensing.

Yzombard works on laser-cooling techniques for exotic ions and antimatter precursors as part of the GBAR (Gravitational Behaviour of Antihydrogen at Rest) collaboration, aiming to measure the free-fall acceleration of antihydrogen as a fundamental test of the equivalence principle.