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Q: Fachverband Quantenoptik und Photonik

Q 34: Quantum Technologies – Sensing I

Q 34.5: Vortrag

Mittwoch, 4. März 2026, 15:45–16:00, P 5

Improving NV Center Magnetometry via Wavelet Enhancement and Memory-Based Protocols — •Matteo Slaviero, Ekrem Taha Güldeste, Justus Tonhäuser, Baha Sakar, and Nabeel Aslam — Felix Bloch Institute for Solid State Physics, Leipzig University, 04103 Leipzig

Wavelet analysis offers a powerful approach to enhance the sensitivity of magnetic field measurements based on nitrogen-vacancy (NV) centers in diamond. In our work, we apply wavelet-based denoising to photoluminescence (PL) traces acquired in optically detected magnetic resonance experiments, where measurement precision is fundamentally limited by photon shot noise. By exploiting the multi-resolution analysis via wavelet decompositions, we selectively suppress noise components while preserving the PL variations that encode the physical quantity of interest. By incorporating appropriate a priori knowledge, wavelet analysis can enable adaptive thresholding to enhance the readout signal. In parallel, we employ sequences that benefit from the increased spin lifetimes of the nuclear spins in the vicinity of the NV. Our results demonstrate a unified approach that combines quantum memory exploitation and wavelet-based enhancement to push the limits of sensitivity and spectral resolution in quantum sensing with NV centers.

Keywords: Wavelet; ODMR; NV; Magnetometry; Quantum Memory