Alex Clark's group works at the interface of quantum science and technology, focusing on: (1) quantum imaging with undetected photons (mid-IR sensing at 3.28 µm using CMOS cameras and entangled photons — QIUP technique); (2) single-molecule photon sources (molecules coupled to nanophotonic cavities); (3) quantum memory protocols (ORCA and ATS in atomic vapours for telecom-band photon storage); (4) integrated photonics for quantum sensing. Director of QET Labs; Work Package Leader in three UK Quantum Technology Hubs.
Hogan leads the Stanford effort on MAGIS-100, a 100-meter atom-interferometric gradiometer at Fermilab designed to search for mid-band gravitational waves and ultralight dark matter using laser-cooled strontium atoms in free fall. His group also develops compact cold-atom gravimeters and gradiometers and explores large-momentum-transfer atom optics to push interferometer sensitivity toward tests of general relativity.
The Kovachy Group applies quantum wave properties of ultracold atoms to precision sensing. Primary focus: (1) Advanced large-momentum-transfer (LMT) atom interferometer pulse sequences using Bragg diffraction and Bloch oscillations to achieve record momentum splits of 100s of ℏk, enhancing sensitivity for fundamental physics tests; (2) MAGIS-100 collaboration — the 100 m-tall atom interferometer at Fermilab targeting gravitational waves in the mid-band complementary to LIGO/LISA, dark matter field searches, and tests of quantum mechanics at macroscopic scales; (3) Search for deviations from Newtonian gravity at micrometer range using atom-interferometric force sensing, and a new measurement of Newton's gravitational constant G; (4) Cryogenic optical cavity dark matter search (with Gabrielse and Geraci groups). David and Lucile Packard Fellow (2020), Paul Ehrenfest Best Paper Award 2020, NIST Precision Measurement Grant 2019. Member of CFP Northwestern and CIERA.
John Rarity's group works on quantum-enhanced measurements and free-space quantum key distribution. Research: (1) quantum imaging with undetected photons — mid-infrared gas sensing (CO2, CH4) exploiting entangled photon pairs, with only near-IR photons detected (startup QLM); (2) sub-shot-noise imaging using quantum-identical photon beams; (3) spin-photon interfaces (1D cavity with near-unit scattering efficiency); (4) compact satellite QKD transmitters (EPSRC Quantum Comms Hub). Highly relevant to quantum-enhanced sensing.