In this webinar, we describe a new approach to directly see the physics inside a DAC at ultrahigh pressures. The basic idea is deceptively simple: We directly integrate a thin layer of nitrogen–vacancy defects, which serve as quantum sensors, into the diamond surface. We demonstrate the ability to perform optical diffraction-limited imaging of both stress fields and magnetism, with the latter allowing us to image the magnetic field expulsion associated with superconductivity. …