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QI: Fachverband Quanteninformation

QI 36: Poster – Quantum Information (joint session QI/Q)

QI 36.28: Poster

Donnerstag, 13. März 2025, 17:00–19:00, Tent

Composite pulses for robust ensemble based quantum tokens with Nitrogen Vacancy color centers — •Jan Thieme, Josselin Bernardoff, Ricky-Joe Plate, Bernd Bauerhenne, and Kilian Singer — Experimental Physics I, Institute of Physics, University of Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany

We report on both analytical and experimental outcomes related to the application of tailored composite pulses [1] to effectively address ensembles of nitrogen-vacancy color centers within a novel ensemble based protocol for quantum tokens [2]. Utilizing analytical techniques specific to the Rosen-Zener excitation model, we have developed broadband excitation profiles to compensate for experimental fluctuations in resonance frequency and pulse area. This is especially important for a quantum token application with ensembles. These custom pulses are applied using an arbitrary waveform generator to precisely control individual NV color centers [3]. Future work aims to enhance this strategy to further reduce the susceptibility to technical limitations, thereby improving the overall robustness and effectiveness of the protocol [4].

[1] G. T. Genov, D. Schraft, T. Halfmann and N. V. Vitanov, Phys. Rev. Lett. 113, 043001 (2014). [2] K. Singer, C. Popov,B. Naydenov, Verfahren zum Erstellen eines Quanten-Datentokens (DE 10 2022 107 528 A1) DE-Patent (2023) [3] A. Schmidt, J. Bernardoff, K. Singer, J. P. Reithmaier and C. Popov, Physica Status Solidi A, 216, 1900233 (2019). [4] G. T. Genov, M. Hain, N. V. Vitanov, and T. Halfmann, Phys. Rev. A, 101, 013827(2020)

Keywords: NV-Center; colore center; quantum controll