Low cross-talk optical addressing of trapped-ion qubits using a novel integrated photonic chip

Ana S. Sotirova; Bangshan Sun; Jamie D. Leppard; Andong Wang; Mohan Wang; Andres Vazquez-Brennan; David P. Nadlinger; Simon Moser; Alexander Jesacher; Chao He; Fabian Pokorny; Martin J. Booth; Christopher J. Ballance

doi:10.1038/s41377-024-01542-x

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Low cross-talk optical addressing of trapped-ion qubits using a novel integrated photonic chip

Original Articles

- Low cross-talk optical addressing of trapped-ion qubits using a novel integrated photonic chip
- Light: Science & Applications Vol. 13, Issue 10, Pages: 2179-2191(2024)
- Affiliations：
  
  1.University of Oxford, Department of Physics, Oxford, OX1 3PU, UK
  2.University of Oxford, Department of Engineering Science, Oxford, OX1 3PJ, UK
  3.Institute of Biomedical Physics, Medical University of Innsbruck, Müllerstraße 44, 6020 Innsbruck, Austria
- Author bio：
  
  Ana S. Sotirova (ana.sotirova@physics.ox.ac.uk)
  Bangshan Sun (b.s.shawnsuen@gmail.com)
  Martin J. Booth (martin.booth@eng.ox.ac.uk)
  Christopher J. Ballance (chris.ballance@physics.ox.ac.uk)
- Funds：
- DOI：10.1038/s41377-024-01542-x
  CLC：
- Received：01 November 2023，
  
  Revised：15 July 2024，
  
  Accepted：2024-07-17，
  
  Published Online：20 August 2024，
  
  Published：31 October 2024
- Accepted：
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Sotirova, A. S. et al. Low cross-talk optical addressing of trapped-ion qubits using a novel integrated photonic chip. Light: Science & Applications, 13, 2179-2191 (2024).
DOI：

Sotirova, A. S. et al. Low cross-talk optical addressing of trapped-ion qubits using a novel integrated photonic chip. Light: Science & Applications, 13, 2179-2191 (2024). DOI： 10.1038/s41377-024-01542-x.

摘要

Abstract

Individual optical addressing in chains of trapped atomic ions requires the generation of many small

closely spaced beams with low cross-talk. Furthermore

implementing parallel operations necessitates phase

frequency

and amplitude control of each individual beam. Here

we present a scalable method for achieving all of these capabilities using a high-performance integrated photonic chip coupled to a network of optical fibre components. The chip design results in very low cross-talk between neighbouring channels even at the micrometre-scale spacing by implementing a very high refractive index contrast between the channel core and cladding. Furthermore

the photonic chip manufacturing procedure is highly flexible

allowing for the creation of devices with an arbitrary number of channels as well as non-uniform channel spacing at the chip output. We present the system used to integrate the chip within our ion trap apparatus and characterise the performance of the full indi

vidual addressing setup using a single trapped ion as a light-field sensor. Our measurements showed intensity cross-talk below ~10

–3

across the chip

with minimum observed cross-talk as low as ~10

–5

关键词

Keywords

references

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