Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 21: Quantum information: Atoms and ions III
Q 21.5: Vortrag
Dienstag, 18. März 2014, 11:30–11:45, UDL HS3038
Dynamics of topological defects in ion Coulomb crystals — •Tobias Burgermeister1, Heather L. Partner1, Ramil Nigmatullin2,3, Karsten Pyka1, Jonas Keller1, Alex Retzker4, Martin B. Plenio2,3, and Tanja E. Mehlstäubler1 — 1Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — 2Institut für Theoretische Physik, Universität Ulm, Germany — 3Department of Physics, Imperial College London, UK — 4Racah Institute of Physics, The Hebrew University of Jerusalem, Israel
We report on our recent experimental and theoretical studies of structural defects (kink solitons) in ion Coulomb crystals [1]. We show how two different types of kinks can be produced by non-adiabatically quenching of the radial trapping potential. Calculations of the Peierls-Nabarro potentials are presented for both kink types to explain kink properties observed in the experiment and in simulations. In addition, we discuss the influence of mass defects on kinks. This influence can be modified in a controlled way by an additionally applied electric field. Finally we present experimental methods for a deterministic creation and manipulation of kink defects.
[1] Partner et al., New J. Phys. 15, 103013 (2013)