Intensity stabilisation of optical pulse sequences for coherent control of laser-driven qubits

Thom, Joseph and Yuen, Ben and Wilpers, Guido and Riis, Erling and Sinclair, Alastair G. (2018) Intensity stabilisation of optical pulse sequences for coherent control of laser-driven qubits. Applied Physics B: Lasers and Optics, 124 (90). ISSN 0946-2171 (https://doi.org/10.1007/s00340-018-6955-4)

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Abstract

We demonstrate a system for intensity stabilisation of optical pulse sequences used in laser-driven quantum control of trapped ions. Intensity instability is minimised by active stabilisation of the power (over a dynamic range of > 104 ) and position of the focused beam at the ion. The fractional Allan deviations in power were found to be < 2.2 × 10−4 for averaging times from 1 to 16,384 s. Over similar times, the absolute Allan deviation of the beam position is < 0.1 μm for a 45 μm beam diameter. Using these residual power and position instabilities, we estimate the associated contributions to infidelity in example qubit logic gates to be below 10−6 per gate.

ORCID iDs

Thom, Joseph, Yuen, Ben, Wilpers, Guido, Riis, Erling ORCID logoORCID: https://orcid.org/0000-0002-3225-5302 and Sinclair, Alastair G.;
  • Item type:Article
    ID code:63953
    Dates:
    Date
    Event
    3 May 2018
    Published
    3 May 2018
    Published Online
    21 April 2018
    Accepted
    Notes:This is a post-peer-review, pre-copyedit version of an article published in Applied Physics B: Lasers and Optics. The final authenticated version is available online at: https://doi.org/10.1007/s00340-018-6955-4.
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:08 May 2018 13:32
    Last modified:11 Nov 2024 11:59
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/63953
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