Preprint

PUBDB-2023-03723

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Cold highly charged ions in a radio-frequency trap with superconducting magnetic shielding

Dijck, E. A. (Corresponding author) ; Warnecke, C. ; Wehrheim, M. ; Henninger, R. B. ; Eff, J. ; Georgiou, K. ; Graf, A. ; Kokh, S. ; Kozhiparambil Sajith, L. P.DESY* ; Mayo, C. ; Schäfer, V. M. ; Volk, C. ; Schmidt, P. O. ; Pfeifer, T. ; Crespo López-Urrutia, J. R.

2023

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Report No.: arXiv:2306.01670

Abstract: We implement sympathetic cooling of highly charged ions (HCI) by fully enclosing a linear Paul trap within a superconducting radio-frequency resonator. A quantization magnetic field applied while cooling down into the superconducting state remains present in the trap for centuries and external electromagnetic fluctuations are greatly suppressed. A magnetic field decay rate at the 10$^{-10}$ s$^{-1}$ level is found using trapped Doppler-cooled Be$^+$ ions as hyperfine-structure (hfs) qubits. Ramsey interferometry and spin-echo measurements on magnetically-sensitive hfs transitions yield coherence times of >400 ms, showing excellent passive shielding at frequencies down to DC. For sympathetic cooling of HCI, we extract them from an electron beam ion trap (EBIT) and co-crystallize one together with Doppler-cooled Be$^+$ ions. By subsequently ejecting all but one Be$^+$ ions, we prepare single HCI for quantum logic spectroscopy towards frequency metrology and qubit operations with a great variety of HCI species.

Keyword(s): shielding, magnetic ; coherence, time ; logic, quantum ; fluctuation, electromagnetic ; magnetic field, decay rate ; electron, beam ; ion ; superconductivity ; qubit ; suppression ; hyperfine structure ; ion trap ; quantization ; interferometer

Note: 16 pages, 19 figures. The following article has been submitted to Review of Scientific Instruments. After it is published, it will be found at https://rsi.aip.org/

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Contributing Institute(s):

1. Z_DET (Z_DET)

Research Program(s):

1. 622 - Detector Technologies and Systems (POF4-622) (POF4-622)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2023

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Database coverage:
Published

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Dijck, E. A. (Corresponding author) ; Warnecke, C. ; Wehrheim, M. ; Henninger, R. B. ; Eff, J. ; Georgiou, K. ; Graf, A. ; Kokh, S. ; Sajith, L. P. K.DESY* ; Mayo, C. ; Schäfer, V. M. ; Volk, C. ; Schmidt, P. O. ; Pfeifer, T. ; Crespo López-Urrutia, J. R.
Sympathetically cooled highly charged ions in a radio-frequency trap with superconducting magnetic shielding
Review of scientific instruments 94(8), 083203 (2023) [10.1063/5.0160537]2023     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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