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Journal Article

Sympathetically cooled highly charged ions in a radio-frequency trap with superconducting magnetic shielding

MPS-Authors
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Dijck,  Elwin A.       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Warnecke,  Christian       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Wehrheim,  Malte       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Henninger,  Ruben B.
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Eff,  Julia
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Georgiou,  Kostas       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Graf,  Andrea
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Kokh,  Stepan       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Kozhiparambil Sajith,  Lakshmi P.       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Mayo,  Christopher       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Schäfer,  Vera M.       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Volk,  Claudia
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Pfeifer,  Thomas       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Crespo López-Urrutia,  José R.       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

External Resource

https://pubs.aip.org/aip/rsi/article/94/8/083203/2908343/Sympathetically-cooled-highly-charged-ions-in-a
(Publisher version)

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Citation

Dijck, E. A., Warnecke, C., Wehrheim, M., Henninger, R. B., Eff, J., Georgiou, K., et al. (2023). Sympathetically cooled highly charged ions in a radio-frequency trap with superconducting magnetic shielding. Review of Scientific Instruments, 94(8): 083203. doi:10.1063/5.0160537.


Cite as: https://hdl.handle.net/21.11116/0000-000D-B743-9
Abstract
We sympathetically cool highly charged ions (HCI) in Coulomb crystals of Doppler-cooled Be+ ions confined in a cryogenic linear Paul trap that is integrated into a fully enclosing radio-frequency resonator manufactured from superconducting niobium. By preparing a single Be+ cooling ion and a single HCI, quantum logic spectroscopy toward frequency metrology and qubit operations with a great variety of species are enabled. While cooling down the assembly through its transition temperature into the superconducting state, an applied quantization magnetic field becomes persistent, and the trap becomes shielded from subsequent external electromagnetic fluctuations. Using a magnetically sensitive hyperfine transition of Be+ as a qubit, we measure the fractional decay rate of the stored magnetic field to be at the 10−10 s−1 level. Ramsey interferometry and spin-echo measurements yield coherence times of >400 ms, demonstrating excellent passive magnetic shielding at frequencies down to DC.