Douillet works on precision spectroscopy of cold trapped molecular hydrogen ions, developing laser-cooling and rotational-state-selection techniques to improve the accuracy of tests of molecular QED alongside Laurent Hilico.

Hilico develops high-resolution laser and two-photon spectroscopy of trapped, sympathetically-cooled molecular hydrogen ions (H2+, HD+) to test molecular QED and extract fundamental constants (proton/electron mass ratio), part of LKB's broader precision-metrology and fundamental-interaction-testing programme.

Tan trained at NIST Boulder in the Wineland lineage and brought quantum-logic spectroscopy and entanglement-enhanced metrology to Sydney. His independent programme builds trapped-ion systems for quantum simulation of vibronic and chemical dynamics, for bosonic/qudit encodings, and — most relevant here — for precision measurement that exploits entangled states to beat the standard quantum limit. The group also works on high-fidelity gates and on using motional modes as sensitive transducers of weak forces and electric fields. 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 — entanglement-enhanced protocols are the natural next step beyond the shot-noise-limited pT/sqrt(Hz) ensemble measurements that define the current NV state of the art, and Tan is one of a small number of Australian PIs actually implementing them. Mid-career, actively building; a strong option for a candidate wanting to move from spin ensembles to entangled sensors.