Ahmed develops cryogenic TES bolometer arrays and SQUID multiplexing readout for next-generation CMB polarization instruments (CMB-S4 and predecessors), working at the intersection of quantum-limited detector physics and observational cosmology.

Develops cryogenic detector technology for CMB experiments. Directions: (1) TES bolometer array design and fabrication for SPT-3G and CMB-S4; (2) MKID detector development as alternative to TES for next-generation CMB focal planes; (3) low-noise SQUID multiplexed readout for large-format arrays; (4) SPT-3G science: CMB lensing, cluster SZ, B-mode polarization. Argonne joint appointment.

Bock develops cryogenic bolometer and kinetic-inductance detector arrays for cosmic-microwave-background polarimetry (BICEP/Keck) to probe inflationary gravitational waves, and leads the SPHEREx all-sky near-infrared spectral survey; a continuing detector-technology program spans TES and thermal-KID arrays. For context, this complements the established paradigm of NV-diamond ensemble magnetometry (Hahn-echo/DEER, nanoscale NMR, T1 relaxometry) operating near pT/√Hz sensitivity.

Experimental cosmologist building and operating CMB telescopes. Directions: (1) South Pole Telescope — PI of SPT series; SPT-3G currently mapping CMB temperature and polarization at arcminute resolution; (2) thermal and kinematic Sunyaev-Zel'dovich effect mapping for galaxy cluster cosmology; (3) CMB gravitational lensing for large-scale structure; (4) CMB-S4 design and planning. Argonne joint appointment. APS and AAAS Fellow.

Develops superconducting detector and readout systems for CMB observations. Directions: (1) SQUID-multiplexed readout architecture for large TES bolometer arrays (SPT-3G, CMB-S4); (2) transition-edge sensor bolometer fabrication and characterization; (3) MKID detector development; (4) CMB-S4 instrument design. Argonne joint appointment. Deep expertise in quantum-limited cryogenic detector readout.

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.

Holzapfel develops and deploys cryogenic TES bolometer arrays with SQUID multiplexed readout for the South Pole Telescope and related cosmic microwave background experiments, pushing detector sensitivity toward the photon-noise limit for measurements of CMB anisotropy and polarization.

Irwin invented the transition-edge sensor (TES) and pioneered SQUID-multiplexed readout now used throughout CMB and dark-matter detector arrays; his group builds quantum-limited electromagnetic sensors for axion dark matter searches (DMRadio) and cryogenic calorimeters, pushing sensitivity to the standard quantum limit and beyond -- a field of quantum sensing that, like ensemble NV-diamond magnetometry reaching pT/√Hz sensitivities, trades off bandwidth and volume for extreme field sensitivity.

Jones leads the SPIDER balloon-borne CMB polarimeter (and the successor Taurus mission), building and flying large TES bolometer arrays from Antarctic long-duration balloon platforms to measure degree-scale CMB polarization with minimal atmospheric loading, and also leads SuperBIT, a near-diffraction-limited stratospheric optical telescope. Like Staggs, he is included here as an astronomy/instrumentation pivot whose science case rests on cutting-edge cryogenic detector-array sensitivity.

Kuo develops and deploys TES bolometer arrays and SQUID-multiplexed readout electronics for cosmic microwave background polarization experiments (BICEP/Keck, South Pole Telescope, CMB-S4), pairing quantum-limited cryogenic sensor design with cosmology to search for inflationary gravitational-wave signatures.