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

Joseph Thom, Ben Yuen, Guido Wilpers, Erling Riis, Alastair G. Sinclair

Research output: Contribution to journalArticle

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.
LanguageEnglish
Number of pages12
JournalApplied Physics B: Lasers and Optics
Volume124
Issue number90
Early online date3 May 2018
DOIs
Publication statusE-pub ahead of print - 3 May 2018

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stabilization
pulses
lasers
deviation
dynamic range
logic
ions
estimates

Keywords

  • optical pulse
  • ions
  • laser-driven qubits

Cite this

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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.",
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Intensity stabilisation of optical pulse sequences for coherent control of laser-driven qubits. / Thom, Joseph; Yuen, Ben; Wilpers, Guido ; Riis, Erling; Sinclair, Alastair G.

In: Applied Physics B: Lasers and Optics, Vol. 124, No. 90, 03.05.2018.

Research output: Contribution to journalArticle

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AU - Wilpers, Guido

AU - Riis, Erling

AU - Sinclair, Alastair G.

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N2 - 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.

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