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Quantum technologies

Dieter Meschede's research group
Home Group members Lukas Ahlheit
Group members
B. Sc. Lukas Ahlheit
Position: Postgraduate student
Field of research: Fibre cavity QED
Institut für Angewandte Physik
Wegelerstr. 8
D-53115 Bonn
Office room: 112c
Laboratory room: 209/219
E-mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it.
Office: +49 228 73-62146
Laboratory: +49 228 73-3485


  • L. Ahlheit
    Preparation of Small Atomic Ensembles in a Fiber Cavity, (2020), Master thesisBibTeXPDF

    In this work, I report on the imaging and preparation of small atomic ensembles inside our fiber cavity. In Chapter 2, non-destructive techniques for determining the number of atoms loaded into the mode of the cavity are presented. Fluorescence images obtained via Raman cooling imaging [35] are analyzed by means of atom position determination and fluorescence integration. Furthermore, a non-invasive and resource-efficient multi-atom loading technique, based on atom accumulation at the orthogonal lattice crossing under continuous transport, is proposed. The method is studied by a classical 1D numerical simulation in Chapter 3, to explore the parameter space and dynamics of this loading technique. In Chapter 4, the implementation of the novel loading technique is explained and measurement results are compared to the numerical findings. Finally, it is compared to two alternative loading methods and their spatial loading distributions are analyzed. The Appendix presents the procedure for the interferometric alignment of the focal points of the four aspheric lenses used to focus the dipole trap beams and to image the trapped atoms.

  • L. Ahlheit
    Frequenzvariable Phasenstabilisierung eines Diodenlasers auf einen optischen Frequenzkamm, (2017), Bachelor thesisBibTeXPDF

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