Simon Groeblacher's lab probes quantum physics at meso- and macroscopic scales using mechanical motion, rare-earth ion emitters, and superconducting qubits. Key research directions: (1) quantum optomechanics with photonic crystal nano-beam resonators deep in the resolved-sideband regime; (2) silicon defect emitters (rare-earth doped silicon) for quantum network nodes; (3) quantum acoustics experiments coupling mechanical resonators to superconducting qubits. The lab fabricates all devices in-house at Kavli Nanolab and has received NWO Summit Grant for 'Quantum Limits' and QDNL/NWO grant for quantum network nodes.

Albert Schliesser's group engineers ultracoherent phononic crystal membrane resonators with dissipation-dilution Q>10^9 and uses them for quantum optomechanics: ground-state cooling, back-action-evading measurement, optical quantum memory for single photons, and microwave-optical quantum transduction. Recent work has demonstrated a soft-clamped topological phononic waveguide (Nature 2025) and scanning force microscopy below the standard quantum limit. The group bridges fundamental quantum physics with novel sensors for electromagnetic fields and forces, and mechanical interfaces for hybrid quantum networks.

Emil Zeuthen works on theoretical quantum optomechanics and quantum transduction. Research focuses on (1) figures of merit and protocols for quantum transducers (mechanical interfaces between microwave and optical domains); (2) back-action-evading measurements using optomechanical systems; (3) quantum limits for gravitational wave detection with mechanical systems in a negative-mass spin reference frame. Key QUANTOP theory collaborator bridging optomechanics and quantum sensing.