Mainz 2026 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 47: Quantum Technologies – Sensing II

Q 47.6: Vortrag

Donnerstag, 5. März 2026, 12:15–12:30, P 5

High-Sensitivity NV-Diamond Magnetometry for Non-Invasive Detection of Magnetocardiography — •Michael Kübler, Jixing Zhang, Magnus Benke, Yi hua Wang, Cheuk Cheung, and Andrej Denisenko — 3rd Institute of Physics, University of Stuttgart, 70569 Stuttgart, Germany

We demonstrate detection of weak cardiac magnetic signals using high-sensitivity NV-diamond magnetometers enhanced by magnetic flux concentrators and CW-ODMR readout. With this scheme, we achieve effective sub-pT sensitivity and reliably detect temporal fluctuations corresponding to the propagation of cardiac action potentials. The signals show close agreement with conventional electrophysiology electrodes, but without direct tissue contact.

This method enables non-invasive and high-resolution monitoring of the heart's electrical activity, offering potential for early diagnosis and continuous real-time monitoring of cardiovascular health. These results highlight NV-diamond magnetometry as a promising platform for biomedical applications, bridging quantum sensing and clinical diagnostics, and supporting future integration into wearable devices for arrhythmia detection and other cardiovascular disorders.

Keywords: Nitrogen-vacancy center; Magnetocardiography; Magnetometer; Optically Detected Magnetic Resonance; Flux Concentration