Integrated multi-wavelength control of an ion qubit. Niffenegger, R. J., Stuart, J., Sorace-Agaskar, C., Kharas, D., Bramhavar, S., Bruzewicz, C. D., Loh, W., Maxson, R. T., McConnell, R., Reens, D., West, G. N., Sage, J. M., & Chiaverini, J. Nature, 586(7830):538–542, October, 2020. Number: 7830 Publisher: Nature Publishing Group![Integrated multi-wavelength control of an ion qubit [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Monolithic integration of control technologies for atomic systems is a promising route to the development of quantum computers and portable quantum sensors1–4. Trapped atomic ions form the basis of high-fidelity quantum information processors5,6 and high-accuracy optical clocks7. However, current implementations rely on free-space optics for ion control, which limits their portability and scalability. Here we demonstrate a surface-electrode ion-trap chip8,9 using integrated waveguides and grating couplers, which delivers all the wavelengths of light required for ionization, cooling, coherent operations and quantum state preparation and detection of Sr+ qubits. Laser light from violet to infrared is coupled onto the chip via an optical-fibre array, creating an inherently stable optical path, which we use to demonstrate qubit coherence that is resilient to platform vibrations. This demonstration of CMOS-compatible integrated photonic surface-trap fabrication, robust packaging and enhanced qubit coherence is a key advance in the development of portable trapped-ion quantum sensors and clocks, providing a way towards the complete, individual control of larger numbers of ions in quantum information processing systems.
@article{niffenegger_integrated_2020,
title = {Integrated multi-wavelength control of an ion qubit},
volume = {586},
copyright = {2020 The Author(s), under exclusive licence to Springer Nature Limited},
issn = {1476-4687},
url = {https://www.nature.com/articles/s41586-020-2811-x},
doi = {10.1038/s41586-020-2811-x},
abstract = {Monolithic integration of control technologies for atomic systems is a promising route to the development of quantum computers and portable quantum sensors1–4. Trapped atomic ions form the basis of high-fidelity quantum information processors5,6 and high-accuracy optical clocks7. However, current implementations rely on free-space optics for ion control, which limits their portability and scalability. Here we demonstrate a surface-electrode ion-trap chip8,9 using integrated waveguides and grating couplers, which delivers all the wavelengths of light required for ionization, cooling, coherent operations and quantum state preparation and detection of Sr+ qubits. Laser light from violet to infrared is coupled onto the chip via an optical-fibre array, creating an inherently stable optical path, which we use to demonstrate qubit coherence that is resilient to platform vibrations. This demonstration of CMOS-compatible integrated photonic surface-trap fabrication, robust packaging and enhanced qubit coherence is a key advance in the development of portable trapped-ion quantum sensors and clocks, providing a way towards the complete, individual control of larger numbers of ions in quantum information processing systems.},
language = {en},
number = {7830},
urldate = {2020-12-08},
journal = {Nature},
author = {Niffenegger, R. J. and Stuart, J. and Sorace-Agaskar, C. and Kharas, D. and Bramhavar, S. and Bruzewicz, C. D. and Loh, W. and Maxson, R. T. and McConnell, R. and Reens, D. and West, G. N. and Sage, J. M. and Chiaverini, J.},
month = oct,
year = {2020},
note = {Number: 7830
Publisher: Nature Publishing Group},
keywords = {integrated-photonics, notion, photonics, trapped-ions},
pages = {538--542},
}
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