Barnes co-developed (with Nottingham's Matt Brookes) OPM-MEG, the first wearable whole-head magnetoencephalography scanner: a helmet of optically-pumped magnetometer quantum sensors (spin-exchange-relaxation-free Rb vapour cells) that lets patients move naturally during a brain scan, inside an actively-nulled magnetically shielded room. His group has validated the system against cryogenic SQUID-MEG, deployed the UK's first paediatric OPM-MEG epilepsy clinic, and extended the technology to spinal-cord recording and naturalistic/VR paradigms -- a direct human-trials application of a quantum sensor whose femtotesla-scale sensitivity is comparable to the pT/sqrt(Hz)-class sensitivity sought from NV-ensemble magnetometry, but achieved with room-temperature atomic vapour cells rather than solid-state spin defects.

Garrido is a computational cognitive neuroscientist — predictive coding, Bayesian brain models, neuroimaging biomarkers for mental health — who was appointed a chief investigator of the ARC Centre of Excellence in Quantum Biotechnology specifically to work with the Melbourne and UQ physics groups on non-invasive quantum-sensor recording of human brain magnetic fields. She is the human-subject and source-reconstruction end of the QUBIC portable-brain-imager programme: her lab supplies the paradigms, the clinical cohorts and the inverse-problem modelling that a diamond- or OPM-based MEG system has to serve. 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 — she is not a sensor developer, but she is the reason the pT/sqrt(Hz)-class magnetometers being built at Melbourne have a human-trials pathway at all. Preferred attributes present in strength: bioelectromagnetism and human trials with novel quantum technologies. Included as a deliberate borderline case — a sensing postdoc would be the physics half of a collaboration with this lab, not a member of it.