Erlangen 2018 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 5: Precision Spectrosocopy I - trapped ions (joint session A/Q)

Q 5.1: Hauptvortrag

Montag, 5. März 2018, 10:30–11:00, K 1.016

Segmented ion traps with integrated solenoids for scalable microwave based QIP — •Michael Johanning, Timm F. Gloger, Peter Kaufmann, Hendrik Siebeneich, and Christof Wunderlich — Faculty of Science and Technology, Department of Physics, University of Siegen, 57068 Siegen, Germany

Segmented traps have proven to be an essential ingredient for quantum information processing (QIP) using cold trapped ions, as they allow to control the position and shape of ion crystals, even in a time dependent fashion, and can be used to relocate or reshape ion crystals for transport, splitting and merging operations and tune normal modes and distances, e. g. to create strings of equidistant ions.

On the other hand, microwave manipulation has shown to be a way for internal state manipulation with near unit fidelity without requiring sub-Doppler cooling. Additional position dependent fields allow for high fidelity addressing and create an effective spin-spin coupling that can be used to create entangled states. The combination of segmented traps and magnetic gradient induced coupling (MAGIC) allows for tuning of coupling constants, e. g. to create long distance entanglement and thus facilitates scalable quantum simulations.

We give an overview over our ongoing projects which combine segmented microtraps with micro-structured solenoids. Experimental results obtained in such traps include robust Hahn Ramsey interferometry, high fidelity transport of internal states, and single ion addressing.