Berengut works on the atomic structure theory underpinning next-generation clocks: highly charged ions, whose optical transitions are both extremely narrow and exceptionally sensitive to variation of fundamental constants and to new physics, and the thorium-229 nuclear clock. He identifies which ionic species and transitions maximise sensitivity to the physics of interest while remaining experimentally accessible, and computes the many-body structure needed to interpret them — work that has directly guided the experimental HCI clock programmes at PTB, MPIK and NIST. 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 — clocks and magnetometers are the two great classes of quantum sensor; his work is on the frequency side of the same estimation problem that fixes pT/sqrt(Hz) performance on the magnetic side. Theory PI with close experimental collaborations.
Chantler's group is built around the idea that X-ray measurements can be made accurate, not just precise: the X-ray Extended Range Technique (XERT) delivers absolute absorption coefficients at the 0.02 per cent level, which in turn allows XAFS to be used for quantitative structure determination and allows high-accuracy tests of atomic theory. The second thread is precision X-ray spectroscopy of highly charged ions and exotic atoms as a test of bound-state QED, where discrepancies between theory and experiment remain unresolved. 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 precision measurement at the other end of the electromagnetic spectrum: the methodological common ground with pT/sqrt(Hz) NV ensemble sensing is the obsessive treatment of systematics and absolute calibration that separates a sensitive measurement from an accurate one. Borderline inclusion, kept because the group's core competency is metrology rather than X-ray applications.
Cheuk laser-cools and traps individual laser-coolable molecules (e.g. CaF) in optical tweezer arrays, achieving high-fidelity non-destructive imaging, Raman sideband cooling, and on-demand entanglement of molecular qubits, with explicit applications to quantum simulation, quantum information processing, and quantum-enhanced sensing/precision measurement. The rich internal structure of molecules gives access to new sensing modalities (e.g. searches for new physics) that complement atom-based quantum sensors.
Experimental AMO physicist using ultracold atoms and optical lattices for quantum simulation and sensing. Directions: (1) Efimov and few-body physics in ultracold Cs and Cs-Li mixtures; (2) quantum phase transitions and strongly correlated quantum matter in optical lattices; (3) optical tweezer arrays for single-atom and single-molecule quantum simulation. Develops novel imaging techniques for in-situ atomic density measurements.
Nobel laureate Steven Chu's group spans laser cooling/trapping of atoms and single-molecule biophysics, using optical and magnetic tweezers and single-molecule fluorescence to study DNA/RNA folding, molecular motors, and signal transduction -- one of the earliest applications of AMO-derived single-particle measurement precision to living systems.
Experimental AMO physicist focused on precision measurement for fundamental physics. Primary directions: (1) ACME experiment measuring electron electric dipole moment to unprecedented precision using ThO molecular beam — tests for new CP-violating physics beyond the Standard Model; (2) ultracold polar molecule quantum simulation and quantum information in optical tweezers. Atomic coherence techniques underpin SERF/OPM magnetometry. Joined UChicago from Yale 2022.
Doyle's group laser-cools and traps polyatomic and diatomic molecules (including CaF and YbOH) using cryogenic buffer-gas sources, applying them to precision tests of fundamental physics such as the electron electric dipole moment (ACME-style eEDM measurement) and to molecule-based quantum information. This precision-measurement approach to fundamental-symmetry tests is a borderline but included case under the quantum-sensing umbrella, given its shared cold-molecule-platform lineage with atomic/vapor sensing and inertial-sensing work.
Duellmann heads nuclear chemistry at JGU (TRIGA reactor site) with joint appointments at GSI and the Helmholtz Institute Mainz, working on the production, chemical separation and characterization of the heaviest elements. For this search the relevant thread is 229Th: his group supplies and prepares the isomeric thorium samples and molecular thorium ions that Wendt's laser spectroscopy and Schmidt-Kaler's ion traps interrogate en route to a nuclear clock, and he is part of the broader radioactive-molecule programme aimed at symmetry-violation searches. Relative to the established NV-ensemble quantum-sensing playbook (DEER, nanoscale NMR, T1 relaxometry at pT/sqrt(Hz) ensemble sensitivity), the pivot is toward the next frontier of frequency metrology, where the 'sensor' is a nucleus rather than an electron shell -- an unusually good chemistry/physics interface for a postdoc.
Fan is a junior faculty member specializing in searches for physics beyond the Standard Model through precision measurements using ion traps and molecules. Included as a borderline quantum-sensing/precision-measurement case, analogous to eEDM-style molecular and ion-trap metrology elsewhere in the department.
Flambaum is one of the most cited atomic theorists alive and the intellectual source of a large fraction of the modern precision-AMO new-physics programme. His group computes the atomic and molecular structure factors that convert an experimental frequency shift into a bound on new physics: enhancement factors for electron and nuclear EDMs, atomic parity violation, the sensitivity of clock transitions to variation of the fine-structure constant, and — most relevant to quantum sensing — the response of atomic clocks, magnetometers and comagnetometers to ultralight/axion-like dark matter fields. He proposed much of the theory behind using networks of quantum sensors as dark matter detectors. 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 — his theory is what tells an experimentalist what a pT/sqrt(Hz) magnetometer or a 10^-18 clock actually constrains: without it, a spin-precession measurement is just a number. Theory group; a sensing postdoc would collaborate rather than join.