Pioneer in spintronics and quantum information engineering. Research spans: (1) NV-center spin qubits in diamond for quantum sensing and communication including nanomagnetic imaging; (2) spin defects in SiC and Er-doped hosts for quantum network nodes at telecom wavelengths; (3) molecular and protein-based spin qubits (2025 fluorescent-protein spin qubit, Physics World Top-10); (4) coherent Er spin defects in colloidal nanocrystal hosts (2024, with Alivisatos). Founding Director Chicago Quantum Exchange. Joint Senior Scientist Argonne. Large infrastructure-rich group with strong industry ties (IBM, Intel, Google quantum).
Primary focus: immune engineering for vaccines and cancer immunotherapy. Quantum sensing relevance: co-authored 2025 fluorescent-protein spin qubit paper (Physics World Top-10) with Maurer and Awschalom, contributing protein engineering expertise to develop biological alternatives to NV centers. Collaborates on quantum biosensors for real-time monitoring of immune cell activity (Chan Zuckerberg Biohub). Primarily a collaboration gateway for NV biosensing rather than standalone quantum sensing PI.
Krueger's chemistry group develops diamond and nanodiamond surface chemistry, functionalization and bioconjugation that make NV centres viable, shallow, coherent quantum sensors for chemical and biological targets - the materials-chemistry enabler for NV ensemble sensing. She co-leads Stuttgart's quantum-technologies profile. In the broader landscape of NV-centre ensemble quantum sensing (DEER, nano-NMR, T1 relaxometry) operating near pT/sqrt(Hz) sensitivity, this work is enabled at the surface-chemistry level by this work.
Develops quantum sensing platforms at the biology interface. Core NV-center work: (1) widefield NV magnetic imaging of action potentials in neurons and cardiac tissue; (2) NV-based single-molecule NMR at 14 T resolving molecular structure with single-molecule sensitivity; (3) charge-sensitive shallow NV nanoprobes monitoring real-time cellular electrophysiology; (4) biocompatible diamond surface functionalization enabling multiplexed DNA microarray biosensing; (5) fluorescent-protein spin qubits as biological alternatives to diamond NV (2025 paper, Physics World Top-10 Breakthrough). Runs full NV stack: hot implantation, widefield and confocal ODMR, T1/T2/Hahn echo/DEER/Rabi, automated fitting pipelines. 2026 Sloan Fellow. PhD Lukin/Harvard; postdoc Chu/Stanford. Argonne joint appointment.