Details
| Original language | English |
|---|---|
| Article number | 093002 |
| Pages (from-to) | 93002 |
| Number of pages | 1 |
| Journal | Physical review letters |
| Volume | 135 |
| Issue number | 9 |
| Publication status | Published - 28 Aug 2025 |
Abstract
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Physical review letters, Vol. 135, No. 9, 093002, 28.08.2025, p. 93002.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Finding the Ultranarrow P32→P30 Electric Quadrupole Transition in Ni12+ Ion for an Optical Clock
AU - Cheung, Charles
AU - Porsev, Sergey G.
AU - Filin, Dmytro
AU - Safronova, Marianna S.
AU - Wehrheim, Malte
AU - Spieß, Lukas J.
AU - Chen, Shuying
AU - Wilzewski, Alexander
AU - López-Urrutia, José R. Crespo
AU - Schmidt, Piet O.
N1 - Publisher Copyright: © 2025 American Physical Society.
PY - 2025/8/28
Y1 - 2025/8/28
N2 - The Ni12+ ion features an electronic transition with a natural width of only 8 mHz, allowing for a highly stable optical clock. We predict that the energy of this strongly forbidden 3𝑠23𝑝4 3 𝑃 2→3𝑠23𝑝4 3 𝑃 0 electric quadrupole transition is 20 081(10) cm−1. For this, we use both a hybrid approach combining configuration interaction with a coupled-cluster method and a pure configuration interaction calculation for the complete 16-electron system, ensuring convergence. The resulting very small theoretical uncertainty of only 0.05% allowed us to find the transition experimentally in a few hours, yielding an energy of 20 078.984(10) cm−1. This level of agreement for a 16-electron system is unprecedented and qualifies our method for future calculations of many other complex atomic systems. While paving the way for a high-precision optical clock based on Ni12+, our theory and code development will also enable better predictions for other highly charged ions and other complex atomic systems.
AB - The Ni12+ ion features an electronic transition with a natural width of only 8 mHz, allowing for a highly stable optical clock. We predict that the energy of this strongly forbidden 3𝑠23𝑝4 3 𝑃 2→3𝑠23𝑝4 3 𝑃 0 electric quadrupole transition is 20 081(10) cm−1. For this, we use both a hybrid approach combining configuration interaction with a coupled-cluster method and a pure configuration interaction calculation for the complete 16-electron system, ensuring convergence. The resulting very small theoretical uncertainty of only 0.05% allowed us to find the transition experimentally in a few hours, yielding an energy of 20 078.984(10) cm−1. This level of agreement for a 16-electron system is unprecedented and qualifies our method for future calculations of many other complex atomic systems. While paving the way for a high-precision optical clock based on Ni12+, our theory and code development will also enable better predictions for other highly charged ions and other complex atomic systems.
UR - http://www.scopus.com/inward/record.url?scp=105016275283&partnerID=8YFLogxK
U2 - 10.1103/flwf-c2m1
DO - 10.1103/flwf-c2m1
M3 - Article
VL - 135
SP - 93002
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 9
M1 - 093002
ER -