Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 5: Quantum information: Atoms and ions I

Q 5.2: Vortrag

Montag, 17. März 2014, 11:00–11:15, UDL HS3038

Trapping and cooling of two-species ion chains for quantum control — •Hsiang-Yu Lo, Daniel Kienzler, Ben Keitch, Ludwig de Clercq, Vlad Negnevitsky, Frieder Lindenfelser, Florian Leupold, Joseba Alonso, Matteo Marinelli, Christa Flühmann, and Jonathan Home — Institute for Quantum Electronics, Zurich, Switzerland

I will describe a flexible setup for the control of beryllium-calcium ion chains in a micro-structured segmented linear Paul trap. We have loaded multi-species ion strings, and imaged both species simultaneously using a bi-chromatic imaging system. We measure a heating rate for calcium ions of 10 quanta per second in a room-temperature trap with a 180 micron ion-electrode distance. For high-fidelity control of beryllium ions, we have built a solid-state laser system which generates 2 W of continuous-wave light at 313 nm. The main advantage of using two species of ion is that we can individually control each species without disturbing the internal states of the other, due to the large wavelength difference between the transitions in the ions. This provides a variety of opportunities for quantum control.