High-fidelity, adaptive qubit measurements through repetitive information transfer

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dc.creatorHume, D. B.
dc.creatorRosenband, T.
dc.creatorWineland, D. J.
dc.date2007-05-14
dc.date2007-05-15
dc.date.accessioned2026-07-07T08:01:22Z
dc.date.available2026-07-07T08:01:22Z
dc.descriptionUsing two trapped ion species ($\rm{^{27}Al^+}$ and $\rm{^9Be^+}$) as primary and ancillary systems, we implement qubit measurements based on the repetitive transfer of information and quantum nondemolition detection. The repetition provides a natural mechanism for an adaptive measurement strategy, which leads to exponentially lower error rates compared to using a fixed number of detection cycles. For a single qubit we demonstrate 99.94 % measurement fidelity. We also demonstrate a technique for adaptively measuring multiple qubit states using a single ancilla, and apply the technique to spectroscopy of an optical clock transition.
dc.descriptionAdded Acknowledgements 4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0705.1870
dc.identifierhttp://arxiv.org/abs/0705.1870
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/128889
dc.subjectQuantum Physics
dc.titleHigh-fidelity, adaptive qubit measurements through repetitive information transfer
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