Buechler leads quantum many-body theory at ITP III: strongly interacting quantum systems, quantum optics, and the theory of cold atomic and molecular gases -- in particular Rydberg systems, where he has been a central theorist for interaction-engineered tweezer arrays, dressed interactions and photon-photon interactions in Rydberg media. He is the theory counterpart to Pfau's and Wrachtrup's experiments in the same department. Relative to the established NV-ensemble quantum-sensing playbook (DEER, nanoscale NMR, T1 relaxometry at pT/sqrt(Hz) ensemble sensitivity), a theory-first inclusion: the relevant output is the protocol layer -- how to engineer Hamiltonians in interacting spin/Rydberg ensembles so that entanglement or dressing improves sensitivity beyond the standard quantum limit, which is exactly the theory an NV-ensemble sensing programme needs and rarely has in-house.

Laurent Sanchez-Palencia (CNRS DR / Professor, CPHT, École Polytechnique) leads the Quantum Matter theory group. Research: (1) many-body quantum simulation with cold atoms in optical lattices — disorder and Anderson localisation, strongly correlated phases; (2) ultracold atoms in optical quasicrystals and moiré lattices — exotic band structures and correlated phases; (3) quantum entanglement and metrology — theoretical proposals for entanglement-enhanced sensing; (4) non-equilibrium quantum dynamics and thermalization. Deputy Director Quantum-Saclay. ERC Starting 2011. Prix Leconte 2012 (Académie des Sciences). Moved to CPHT from Institut d'Optique 2016.