Reichardt leads Melbourne's CMB effort and is a member of SPT-3G, the third-generation South Pole Telescope camera, whose focal plane is populated by ~16,000 transition-edge sensor bolometers read out by SQUID multiplexers. His science targets are CMB lensing, the Sunyaev-Zel'dovich effect and the small-scale temperature and polarisation power spectra; the enabling technology is cryogenic quantum-limited detection. 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 — this is the astronomical analogue of the same problem — a detector whose noise floor is set by fundamental quantum limits rather than by the source — and TES/SQUID readout is a natural pivot for a physicist trained on pT/sqrt(Hz) magnetometry, since SQUID amplification is the shared hardware. Preferred attribute present: astronomy where the quantum sensor is the enabling technology.

Builds radio and mm-wave quantum-limited sensing instruments for high-energy astrophysics and cosmology. Directions: (1) PUEO — balloon-borne radio Cherenkov (Askaryan) detector for ultra-high-energy cosmogenic neutrinos; (2) RNO-G — ground-based radio neutrino array at Summit Station, Greenland; (3) UHE cosmic ray radio detection methodology; (4) CMB instrumentation (BICEP/Keck, SPT, CMB-S4). 2025 APS Fellow; 2022 Moore EPII award. Director KICP.

Experimental astroparticle physicist developing radio-based detection of ultra-high-energy cosmic rays. Directions: (1) HAWC — high-altitude water Cherenkov detector for gamma-ray and cosmic ray sensing; (2) IceTop surface array at IceCube for cosmic ray composition at the knee; (3) radio detection of cosmic-ray-induced air showers (Askaryan emission) as a technique for large-scale UHE cosmic ray sensing. Enrico Fermi Institute member.