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Comparison between ion traps with integrated optical cavities for scalable quantum information networks

Nina Podoliak, Hiroki Takahashi, Matthias Keller, Péter Horák

Published May 10, 2016• 0 citations
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The realisation of efficient ion-photon quantum interfaces is an essential step towards developing operational quantum information networks. Individual trapped ions have been shown as promising candidates for quantum information processing nodes, while effective ion manipulation and photonic links between nodes can be realised by deterministic coupling of ions to optical cavities. However, integrating optical cavities into ion traps remains a challenge as the trapping potential is affected by the presence of any dielectric or conductor.
Integrating an optical cavity into a radio-frequency ion trap yields an ideal building block for quantum information networks or quantum computers. Unfortunately, it also jeopardizes the trap's stability. The authors compare the advantages and disadvantages of known ion-trap geometries and cavity configurations, and identify general features of the geometries best suited to developing a scalable network. This comprehensive study is an essential step in the development of tomorrow's secure quantum networks.