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Towards wiring up trapped ions

Nikolaos Daniilidis, Unifersity of California, Berkeley

(Session 2 : Friday from 10:45-11:15)

Abstract. We are pursuing experiments aiming at a transmission-line interface to transfer quantum information between distant ions: 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 motional states can be 1 ms for coupling via a floating conductor located above a surface trap. Alternatively resonant-circuit based geometries with increased coupling rates are also considered. We discuss coupling rates and expected heating rates for different approaches. In addition we discuss trap operation 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. This “wire-mediated” coupling may be used for scalable quantum information processing, but may also interconnect atomic systems to solid-state systems.