Hamburg 2009 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 58: Quanteninformation: Atome und Ionen III
Q 58.6: Vortrag
Freitag, 6. März 2009, 11:45–12:00, VMP 6 HS-A
Coupling trapped ions via transmission lines — Sankaranarayanan S1, Sönke Möller1, Rob Clark2, •Nikos Daniilidis1, and Hartmut Häffner1,3 — 1Institut für Quantenoptik und Quanteninformation Österreichische Akademie der Wissenschaften, Innsbruck, Austria — 2Center for Ultracold Atoms, Massachusetts Institute of Technology, Cambridge, MA, USA — 3Department of Physics, University of California, Berkeley, CA, USA
An oscillating trapped ion induces oscillating image charges in the trap electrodes. If this current is sent to the electrodes of a second trap, it influences the motion of an ion in the second trap. The expected time for a complete exchange of the ion motions is 1 ms for a trap with a characteristic size of 50 µm. This inter-trap coupling may be used for scalable quantum computing, cooling ion species that are not directly accessible to laser cooling, for the non-invasive study of superconductors, and for coupling an ion-trap quantum computer to a solid-state quantum computer, e.g. a system of Josephson junctions.
We are investigating the feasibility of these experiments on microfabricated planar traps. These offer the possibility of multiple independently tunable trapping regions on the same device. We are characterizing the behavior of gold-on-sapphire planar traps in terms of heating rates and micromotion compensation stability. In addition, we discuss trap operation and heating rates in the presence of a floating conductor. The latter will serve as the coupling electrode in experiments aiming at exchange of the motional states of ions in neighboring trapping regions.