Princeton Team Measures Magnetic Fluctuation Wavelengths below Diffraction Limit

Momentum-resolved quantum noise spectroscopy utilising ensembles of diamond quantum sensors is now possible. The work concentrates on spatiotemporal fluctuations that govern and characterise the emergent properties, phase boundaries, and low-energy excitations of strongly correlated matter. Observing these dynamics presented an experimental challenge as traditional methods usually provide either high spatial or temporal resolution, yet rarely both at once. Researchers used high-fidelity wide-field imaging of dense diamond nitrogen vacancy centre ensembles to overcome this restriction. A conversion efficiency exceeding four percent has been achieved for transforming nitrogen ions into…