Details
| Original language | English |
|---|---|
| Article number | 083203 |
| Journal | Review of scientific instruments |
| Volume | 94 |
| Issue number | 8 |
| Early online date | 29 Aug 2023 |
| Publication status | Published - Aug 2023 |
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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Instrumentation
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In: Review of scientific instruments, Vol. 94, No. 8, 083203, 08.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Sympathetically cooled highly charged ions in a radio-frequency trap with superconducting magnetic shielding
AU - Dijck, E. A.
AU - Warnecke, Christian
AU - Wehrheim, Malte
AU - Henninger, Ruben B.
AU - Eff, Julia
AU - Georgiou, Kostas
AU - Graf, Andrea
AU - Kokh, Stepan
AU - Kozhiparambil Sajith, Lakshmi P.
AU - Mayo, Christopher
AU - Schäfer, Vera M.
AU - Volk, Claudia
AU - Schmidt, Piet O.
AU - Pfeifer, Thomas
AU - Crespo López-Urrutia, José R.
N1 - Funding Information: We acknowledge the MPIK workshops with T. Spranz and his team for the outstanding quality of their work in manufacturing hardware for the experiment and the engineering design group of F. Müller for their excellent support. We acknowledge S. Schiller and S. Sturm for providing access to reference signals from a maser and GPS clock. We acknowledge our collaborators at the Physikalisch-Technische Bundesanstalt for providing us with a bi-aspheric lens and laser components. This project received funding from the Max Planck Society; the Max-Planck–Riken–PTB-Center for Time, Constants and Fundamental Symmetries; the European Metrology Program for Innovation and Research (EMPIR), which is co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation program (Project Nos. 17FUN07 CC4C and 20FUN01 TSCAC); the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 101019987); and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the collaborative research center Grant No. SFB 1225 ISOQUANT, through Germany’s Excellence Strategy Grant No. EXC-2123 QuantumFrontiers–390837967, and through Grant No. SCHM2678/5-1. We acknowledge the generous funding by the German Federal Ministry of Education and Research (BMBF) within the program Grant No. 13N15973 “Quantum technologies—from basic research to market” (Projekt VAUQSI—Viel-Frequenz-Ansteuerung Ultrastabiler Qubits in Supraleitenden Ionenfallen).
PY - 2023/8
Y1 - 2023/8
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85169977022&partnerID=8YFLogxK
U2 - 10.1063/5.0160537
DO - 10.1063/5.0160537
M3 - Article
AN - SCOPUS:85169977022
VL - 94
JO - Review of scientific instruments
JF - Review of scientific instruments
SN - 0034-6748
IS - 8
M1 - 083203
ER -