Freiburg 2024 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 12: Quantum Communication II

Q 12.4: Vortrag

Montag, 11. März 2024, 17:45–18:00, HS 3118

Tailored composite pulses for NV-colour centres towards the realization of ensemble based quantum tokens — •Jan Thieme, Josselin Bernardoff, Ricky-Joe Plate, Bernd Bauerhenne, and Kilian Singer — Universität Kassel, Kassel, Germany

We present numerical and experimental results of the application of tailored composite pulses [1] to robustly address ensembles of nitrogen-vacancy colour centres used in a novel protocol for quantum tokens [2,3]. By using analytical methods applied to the Rosen-Zener excitation model [4], we derive excitation profiles for a broadband excitation profile with respect to detuning and pulse duration to compensate for experimental deviations of resonance frequencies and pulse area in the quantum token. Towards this goal we are using an arbitrary waveform generator to supply these pulses to single nitrogen-vacancy colour centres [5]. In the outlook we will describe how this scheme can be improved to suppress sensitivity to technical limitations [6].

[1] B. T. Torosov and N. V. Vitanov, Phys. Rev. A 83, 053420 (2011). [2] https://www.forschung-it-sicherheit-kommunikationssysteme.de/projekte/diqtok [3] K. Singer, C. Popov, B. Naydenov, Verfahren zum Erstellen eines Quanten-Datentokens (DE 10 2022 107 528 A1) DE-Patent (2023) [4] N. Rosen and C. Zener, Phys. Rev. 40, 502 (1932). [5] A. Schmidt, J. Bernardoff, K. Singer, J. P. Reithmaier and C. Popov, Physica Status Solidi A, 216, 1900233 (2019). [6] G. T. Genov, M. Hain, N. V. Vitanov, and T. Halfmann, Phys. Rev. A, 101, 013827(2020).