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

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...

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Main Authors: Dijck, Elwin A. (Author) , Warnecke, Christian (Author) , Wehrheim, Malte (Author) , Henninger, Ruben B. (Author) , Eff, Julia (Author) , Georgiou, Kostas (Author) , Graf, Andrea (Author) , Kokh, Stepan (Author) , Kozhiparambil Sajith, Lakshmi P. (Author) , Mayo, Christopher (Author) , Schäfer, Vera M. (Author) , Volk, Claudia (Author) , Schmidt, Piet O. (Author) , Pfeifer, Thomas (Author) , Crespo López-Urrutia, José Ramon (Author)
Format: Article (Journal)
Language:English
Published: 29 August 2023
In: Review of scientific instruments
Year: 2023, Volume: 94, Issue: 8, Pages: 1-16
ISSN:1089-7623
DOI:10.1063/5.0160537
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1063/5.0160537
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Author Notes:Elwin A. Dijck, Christian Warnecke, Malte Wehrheim, Ruben B. Henninger, Julia Eff, Kostas Georgiou, Andrea Graf, Stepan Kokh, Lakshmi P. Kozhiparambil Sajith, Christopher Mayo, Vera M. Schäfer, Claudia Volk, Piet O. Schmidt, Thomas Pfeifer, and José R. Crespo López-Urrutia
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Summary: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.
Item Description:Gesehen am 13.05.2024
Physical Description:Online Resource
ISSN:1089-7623
DOI:10.1063/5.0160537

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