Golwala's group develops ultrasensitive cryogenic detectors - phonon-mediated devices and kinetic-inductance/TES arrays - for direct dark-matter detection (SuperCDMS) and millimeter/submillimeter astrophysics and CMB measurements, working closely with JPL on detector technology. For context, this complements the established paradigm of NV-diamond ensemble magnetometry (Hahn-echo/DEER, nanoscale NMR, T1 relaxometry) operating near pT/√Hz sensitivity.