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FM: Fall Meeting

FM 41: Poster: Quantum Sensing

FM 41.26: Poster

Dienstag, 24. September 2019, 16:30–18:30, Tents

Optimal sensing with NV Centers in Diamond. — •Nimba Oshnik Pandey and Elke Neu — Universität des Saarlandes, Saarbrücken, Germany

Quantum optimal control theory has been extensively utilized in fields like NMR, atomic/molecular physics, Quantum computation to overcome various limitations posed by the experimental conditions and setup [1]. In this work we aim to develop and test nano-photonic diamond scanning probe structures containing Nitrogen Vacancy centers and implement optimal control fields to improve the sensitivity and robustness of the quantum sensing protocols.

NV centers in diamond have been well studied and utilized as quantum sensors owing to their long spin coherence times, and also the spin-dependent fluorescence. Using such atomic scale single-spin sensors in a scanning probe geometry enables sensing and imaging with maximum spatial resolution; in principle down to order of few nm [2]. We aim to develop control techniques using quantum optimal control algorithms for enhancing the full imaging capability, and to achieve desired robustness against control field amplitude variations and experimental limitations, further test optimization approaches for spin manipulation followed by first proof of principle experiments on optimized sensing.

[1] Glaser, S., Boscain, U., Calarco, T. et al. Eur. Phys. J. D (2015) 69: 279

[2] Fuchs et. al. New J. Phys. 20 125001. 2018.