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Integrated optics approach towards ion trap quantum computation

Taehyun Kim, Duke university

(Session : Thursday from )

Abstract. A recent proposal for realizing scalable quantum computation is based on a micro-fabricated ion trap and its integration with micro-optical components performing various functionalities required for state preparation, gate operation, and state detection. In this work, we focus on the following two schemes where micro-mirrors can be employed to enhance state detection. In the first scheme, the planar trap and the curved mirror are constructed on the same wafer such that the ion can be trapped at the focal point of the mirror, enhancing the collection efficiency of photons emitted from the ion. In another scheme, micro-cavity is formed between the micro-mirror and a fiber tip integrated with a point Paul trap. This cavity can dramatically enhance the coupling efficiency into the fiber by the increased spontaneous emission rate into the cavity mode. To fabricate micro-mirrors on a Si wafer by isotropic etching, we explored the effects of processing conditions on the profile and roughness of the etched surface.