Browsing by Subject "trapped ions"

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  • Niemann, M.; Meiners, T.; Mielke, J.; Borchert, M.J.; Cornejo, J.M.; Ulmer, S.; Ospelkaus, C. (Bristol : Institute of Physics Publishing, 2019)
    Cooling and detection schemes using laser cooling and methods of quantum logic can contribute to high precision CPT symmetry tests in the baryonic sector. This work introduces an experiment to sympathetically cool protons ...
  • Apellaniz, Iagoba; Lücke, Bernd; Peise, Jan; Klempt, Carsten; Toth, Geza (Bristol : IOP Publishing Ltd., 2015-08-13)
    We present a method to verify the metrological usefulness of noisy Dicke states of a particle ensemble with only a few collective measurements, without the need for a direct measurement of the sensitivity. Our method ...
  • Lücke, Bernd; Peise, Jan; Vitagliano, Giuseppe; Arlt, Jan J.; Santos, Luis; Toth, Geza; Klempt, Carsten (College Park : American Physical Society, 2014)
    Recent experiments demonstrate the production of many thousands of neutral atoms entangled in their spin degrees of freedom. We present a criterion for estimating the amount of entanglement based on a measurement of the ...
  • Gebert, Florian; Wan, Yong; Wolf, F.; Heip, J.C.; Schmidt, Piet O. (Bristol : Institute of Physics Publishing, 2016)
    Efficient preparation and detection of the motional state of trapped ions is important in many experiments ranging from quantum computation to precision spectroscopy. We investigate the stimulated Raman adiabatic passage ...
  • Schulte, Marius (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2020)
    This thesis describes new results on the entanglement of atomic spins in Ramsey interferometry, optical atomic clocks and trapped ions. It is divided into three parts: First, we investigate improvements to conventional ...
  • Lörch, Niels (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2015)
    [no abstract]
  • Wan, Yong; Gebert, Florian; Wuebbena, Jannes B.; Scharnhorst, Nils; Amairi, Sana; Leroux, Ian D.; Hemmerling, Boerge; Loerch, Niels; Hammerer, Klemens; Schmidt, Piet O. (London : Nature Publishing Group, 2014)
    Precision spectroscopy of atomic and molecular ions offers a window to new physics, but is typically limited to species with a cycling transition for laser cooling and detection. Quantum logic spectroscopy has overcome ...
  • Hahn, Henning (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2019)
    Towards the goal of a large-scale quantum computer based on trapped ions, near-field microwaves represent a promising approach to perform the techni- cally challenging key operation of a two-qubit entangling gate. In this ...