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  • Stability thresholds and calculation techniques for fast entangling gates on trapped ions

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    BentleyPUB2903.pdf (897.7Kb)
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    Accepted Manuscript (AM)
    Author(s)
    Bentley, Christopher D. B.
    Taylor, Richard L.
    Carvalho, Andre R. R.
    Hope, Joseph J.
    Griffith University Author(s)
    Ribeiro de Carvalho, Andre R.
    Year published
    2016
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    Abstract
    Fast entangling gates have been proposed for trapped ions that are orders of magnitude faster than current implementations. We present here a detailed analysis of the challenges involved in performing a successful fast gate. We show that the rotating wave approximation is stable with respect to pulse numbers: the time scale on which we can neglect terms rotating at the atomic frequency is negligibly affected by the number of pulses in the fast gate. In contrast, we show that the laser pulse instability does give rise to a pulse-number-dependent effect; the fast gate infidelity is compounded with the number of applied imperfect ...
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    Fast entangling gates have been proposed for trapped ions that are orders of magnitude faster than current implementations. We present here a detailed analysis of the challenges involved in performing a successful fast gate. We show that the rotating wave approximation is stable with respect to pulse numbers: the time scale on which we can neglect terms rotating at the atomic frequency is negligibly affected by the number of pulses in the fast gate. In contrast, we show that the laser pulse instability does give rise to a pulse-number-dependent effect; the fast gate infidelity is compounded with the number of applied imperfect pulses. Using the dimensional reduction method presented here, we find bounds on the pulse stability required to achieve two-qubit gate fidelity thresholds.
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    Journal Title
    Physical Review A
    Volume
    93
    Issue
    4
    DOI
    https://doi.org/10.1103/PhysRevA.93.042342
    Copyright Statement
    © 2016 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
    Subject
    Quantum Physics not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/342752
    Collection
    • Journal articles

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