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QI: Fachverband Quanteninformation
QI 20: Metrology and Sensing
QI 20.2: Vortrag
Freitag, 13. März 2026, 09:45–10:00, BEY/0137
Model-free error mitigation in NV center magnetometry — •Dennis Herb1, Miriam Resch1, Mirko Rossini1, Joachim Ankerhold1,2, and Dominik Maile1 — 1Institute for Complex Quantum Systems, Ulm University, Germany — 2Center for Integrated Quantum Science and Technology (IQST), Ulm-Stuttgart, Germany
Quantum sensing is an emerging field with the potential to outperform classical methods in both precision and spatial resolution. However, the sensitivity of the underlying quantum platform also makes them highly susceptible to their environmental noise. To address this issue, techniques from the field of quantum error mitigation have been used to improve measurement results from noisy device signals via post-processing. We present a novel mitigation technique for quantum sensors to efficiently reverse the effects of any noise source that can be described by a completely positive trace preserving map. The method neither requires tomography of the final density matrix after the sensing protocol nor an underlying noise-model. It leverages the knowledge acquired by a pre-characterization step of the device to automatically adapt to the complexity of the dissipative evolution and to indicate which sensing times τ are best suited for the most accurate results. This method represents a further step toward perfecting a new family of sensors with the smallest scale of resolution, enabling measurements at the molecular scale.
Keywords: NV center; Error mitigation; Sensing; Magnetometry; nitrogen-vancancy center