Browsing by Subject "Trapped ions"

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  • Coherent Excitation of the Highly Forbidden Electric Octupole Transition in Yb+ 172 
    Fürst, H.A.; Yeh, C.-H.; Kalincev, D.; Kulosa, A.P.; Dreissen, L.S.; Lange, R.; Benkler, E.; Huntemann, N.; Peik, E.; Mehlstäubler, T.E. (College Park, MD : American Physical Society, 2020)
    We report on the first coherent excitation of the highly forbidden S21/2?F27/2 electric octupole (E3) transition in a single trapped Yb+172 ion, an isotope without nuclear spin. Using the transition in Yb+171 as a reference, ...
  • Cryogenic 9Be+ Penning trap for precision measurements with (anti-)protons 
    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 ...
  • Dynamics of ion Coulomb crystals 
    Timm, Lars (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023)
    The field of quantum simulations has achieved a remarkable success through the development of highly controllable and accessible quantum platforms, which pro- vide insights into the microscopic properties of complex ...
  • Finite-temperature spectrum at the symmetry-breaking linear to zigzag transition 
    Kiethe, Jan; Timm, Lars; Landa, Haggai; Kalincev, Dimitri; Morigi, Giovanna; Mehlstäubler, Tanja E. (Woodbury, NY : Inst., 2021)
    We investigate the normal-mode spectrum of a trapped ion chain at the symmetry-breaking linear to zigzag transition and at finite temperatures. For this purpose, we modulate the amplitude of the Doppler cooling laser to ...
  • Integrated fiber-mirror ion trap for strong ion-cavity coupling 
    Brandstätter, B.; McClung, A.; Schüppert, K.; Casabone, B.; Friebe, K.; Stute, A.; Schmidt, Piet O.; Deutsch, C.; Reichel, J.; Blatt, R.; Northup, T.E. (College Park, MD : American Institute of Physics, 2013)
    We present and characterize fiber mirrors and a miniaturized ion-trap design developed to integrate a fiber-based Fabry-Perot cavity (FFPC) with a linear Paul trap for use in cavity-QED experiments with trapped ions. Our ...
  • Optical atomic clocks 
    Ludlow, Andrew D.; Boyd, Martin M.; Ye, Jun; Peik, E.; Schmidt, Piet O. (College Park, MD : American Physical Society, 2015)
    Optical atomic clocks represent the state of the art in the frontier of modern measurement science. In this article a detailed review on the development of optical atomic clocks that are based on trapped single ions and ...
  • Precision Isotope Shift Measurements in Calcium Ions Using Quantum Logic Detection Schemes 
    Gebert, Florian; Wan, Yong; Wolf, Fabian; Angstmann, Christopher N.; Berengut, Julian C.; Schmidt, Piet O. (College Park, MD : American Physical Society, 2015)
    We demonstrate an efficient high-precision optical spectroscopy technique for single trapped ions with nonclosed transitions. In a double-shelving technique, the absorption of a single photon is first amplified to several ...
  • Quantum Algorithmic Readout in Multi-Ion Clocks 
    Schulte, M.; Lörch, N.; Leroux, I.D.; Schmidt, Piet O.; Hammerer, K. (College Park, MD : American Physical Society, 2016)
    Optical clocks based on ensembles of trapped ions promise record frequency accuracy with good short-term stability. Most suitable ion species lack closed transitions, so the clock signal must be read out indirectly by ...
  • Robust high fidelity microwave near-field entangling quantum logic gate 
    Zarantonello, Giorgio (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2020)
    Trapped ions, together with superconducting qubits, are one of the two leading hardware platforms for scalable quantum information processing. The development of quantum computers represents a major technological breakthrough ...
  • Robust optical clock transitions in trapped ions using dynamical decoupling 
    Aharon, Nati; Spethmann, Nicolas; Leroux, Ian D.; Schmidt, Piet O.; Retzker, Alex (Bristol : Institute of Physics Publishing, 2019)
    We present a novel method for engineering an optical clock transition that is robust agaiast external field fluctuations and is able to overcome limits resulting from field inhomogeneities. The technique is based on the ...
  • Sideband Thermometry of Ion Crystals 
    Vybornyi, Ivan; Dreissen, Laura S.; Kiesenhofer, Dominik; Hainzer, Helene; Bock, Matthias; Ollikainen, Tuomas; Vadlejch, Daniel; Roos, Christian F.; Mehlstäubler, Tanja E.; Hammerer, Klemens (College Park, MD : American Physical Society, 2023)
    Coulomb crystals of cold trapped ions are a leading platform for the realization of quantum processors and quantum simulations and, in quantum metrology, for the construction of optical atomic clocks and for fundamental ...
  • The TRAPSENSOR facility: An open-ring 7 tesla Penning trap for laser-based precision experiments 
    Gutiérrez, Manuel J.; Berrocal, Joaquín; Cornejo, Juan M.; Domínguez, Francisco; Del Pozo, Jesús J.; Arrazola, Iñigo; Bañuelos, Javier; Escobedo, Pablo; Kaleja, Oliver; Lamata, Lucas; Rica, Raúl A.; Schmidt, Stefan; Block, Michael; Solano, Enrique; Rodríguez, Daniel (Bristol : Institute of Physics Publishing, 2019)
    A Penning-trap facility for high-precision mass spectrometry based on a novel detection method has been built. This method consists in measuring motional frequencies of singly-charged ions trapped in strong magnetic fields ...
  • Towards a transportable aluminium ion quantum logic optical clock 
    Hannig, Stephan; Pelzer, L.; Scharnhorst, N.; Kramer, J.; Stepanova, M.; Xu, Z.T.; Spethmann, N.; Leroux, I.D.; Mehlstäubler, Tanja E.; Schmidt, Piet O. (American Institute of Physics : [S.l.], 2019)
    With the advent of optical clocks featuring fractional frequency uncertainties on the order of 10-17 and below, new applications such as chronometric leveling with few-centimeter height resolution emerge. We are developing ...