Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 13: Posters: Quantum Optics and Photonics I

Q 13.28: Poster

Monday, March 9, 2020, 16:30–18:30, Empore Lichthof

Simulating storage of quantum dot photons in an atom-cavity system — •Maximilian Ammenwerth, Lukas Ahlheit, Wolfgang Alt, Tobias Macha, Pooja Malik, Deepak Pandey, Hannes Pfeifer, Eduardo Uruñuela, and Dieter Meschede — Institut für Angewandte Physik der Universität Bonn Wegelerstr. 8, 53115, Bonn, Germany

Large-scale quantum networks based on the synchronized transfer of single photons require efficient light-matter interfaces which can generate and store photons deterministically. In this regard, the small mode volume of fiber-based Fabry-Pérot cavities offers strong light-matter coupling with high-bandwidth. In our experiment a single rubidium atom is coupled to the cavity. Using a cavity-assisted Raman process we recently demonstrated the storage of short light pulses in such a coupled atom-cavity system [1]. The successful storage of a weak coherent wave packet with a full width at half maximum of 5 ns encourages hybrid experiments with semiconductor quantum dots as a single photon source.

We numerically compute the expected storage efficiency for weak coherent and single photon pulses by means of a numerical simulation that takes into account our system parameters as well as a typical pulse shape of quantum dot photons. The optimal control pulse is found from a numerical optimisation based on simulating the system dynamics via the Lindblad master equation.

[1] T. Macha, et al., arXiv:1903.10922v2 (2019)