Finding the ultranarrow 3  P2 → 3 P0 electric quadrupole transition in Ni12+ Ion for an optical clock

Cheung, Charles; Porsev, Sergey G.; Filin, Dmytro; Safronova, Marianna S.; Wehrheim, Malte; Spieß, Lukas J.; Chen, Shuying; Wilzewski, Alexander; Crespo López-Urrutia, José R.; Schmidt, Piet O.

doi:https://doi.org/10.1103/flwf-c2m1

Zugriffsnummer	55064
Dokumenttyp	Zeitschriftenartikel
Peer Review	mit Peer Review
Sprache	Englisch
Titel	Finding the ultranarrow ³ P₂ → ³ P₀ electric quadrupole transition in Ni¹²⁺ Ion for an optical clock
Autor(in); Institution	Cheung, Charles; Department of Physics and Astronomy, University of Delaware, Newark, Delaware, USA Porsev, Sergey G.; Department of Physics and Astronomy, University of Delaware, Newark, Delaware, USA Filin, Dmytro; Department of Physics and Astronomy, University of Delaware, Newark, Delaware, USA Safronova, Marianna S.; Department of Physics and Astronomy, University of Delaware, Newark, Delaware, USA Wehrheim, Malte; QUEST Institute for Experimental Quantum Metrology, PTB-Braunschweig Spieß, Lukas J.; QUEST Institute for Experimental Quantum Metrology, PTB-Braunschweig Chen, Shuying; QUEST Institute for Experimental Quantum Metrology, PTB-Braunschweig Wilzewski, Alexander; QUEST Institute for Experimental Quantum Metrology, PTB-Braunschweig Crespo López-Urrutia, José R.; Max-Planck-Institut für Kernphysik, Heidelberg, GERMANY Schmidt, Piet O.; QUEST Institute for Experimental Quantum Metrology, PTB-Braunschweig; Leibniz Universität, Institut für Quantenoptik, Hannover, GERMANY
Quelle/Jahr	Physical Review Letters: 135 (2025), 9, 093002-1 - 093002-6
Artikelnummer	093002
ISSN	0031-9007 (print) ; 1079-7114 (online)
DOI	https://doi.org/10.1103/flwf-c2m1
URL	https://journals.aps.org/prl/abstract/10.1103/flwf-c2m1
Verlag	College Park, Md.: APS Physics
Freie Schlagworte	Atomic clock ; Optical clock ; Lattice clock ; Ions ; High-throughput calculations ; Highly charged Ions ; HCI
Zusammenfassung	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 3⁢𝑠²⁢3⁢𝑝⁴ 𝑃²→ 3⁢𝑠²⁢3⁢𝑝⁴ ³𝑃₀electric 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.

Themenbereich der Metrologie	Zeit und Frequenz
Innovationscluster	Quantentechnologie
Geschäftsfelder	Grundlagen der Metrologie

Zitierung

Cheung, C., Porsev, S. G., Filin, D., Safronova, M. S., Wehrheim, M., Spieß, L. J., Chen, S., Wilzewski, A., Crespo López-Urrutia, J. R., & Schmidt, P. O. (2025). Finding the ultranarrow ³ P₂ → ³ P₀ electric quadrupole transition in Ni¹²⁺ Ion for an optical clock. Physical Review Letters, 135(9), 093002-1–093002-6. https://doi.org/10.1103/flwf-c2m1

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