88⁢Sr+ optical clock with 7.9 ×10−19 systematic uncertainty and measurement of its absolute frequency with 9.8 ×10−17 uncertainty

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F25%3AN0000004" target="_blank" >RIV/00177016:_____/25:N0000004 - isvavai.cz</a>

Výsledek na webu

<a href="https://journals.aps.org/prapplied/abstract/10.1103/czlf-bfvp" target="_blank" >https://journals.aps.org/prapplied/abstract/10.1103/czlf-bfvp</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/czlf-bfvp" target="_blank" >10.1103/czlf-bfvp</a>

Jazyk výsledku

angličtina

Název v původním jazyce

88⁢Sr+ optical clock with 7.9 ×10−19 systematic uncertainty and measurement of its absolute frequency with 9.8 ×10−17 uncertainty

Popis výsledku v původním jazyce

We report on a 88⁢Sr+ single-ion optical clock with an estimated fractional systematic uncertainty of 7.9×10−19. The low uncertainty is enabled by small rf losses, a thorough evaluation of the blackbody-radiation temperature, and our recent measurement of the differential polarizability. A detailed uncertainty evaluation is presented. We also report on two absolute frequency measurements: one against a remote cesium fountain clock, and one against International Atomic Time (TAI). The former lasted 12 d and resulted in a frequency value of 444 779 044 095 485.49(15) Hz. The latter spanned 10 months with monthly optical-clock uptimes between 68% and 99%, and yielded a frequency value of 444 779 044 095 485.373(44) Hz. With a fractional uncertainty of 9.8×10−17, it is, to our knowledge, the most accurate optical frequency measurement reported to date. Both frequency values are in agreement with other recent measurements, providing further evidence that the 2021 CIPM recommended frequency value is too high by 1.6 times its uncertainty.

Název v anglickém jazyce

88⁢Sr+ optical clock with 7.9 ×10−19 systematic uncertainty and measurement of its absolute frequency with 9.8 ×10−17 uncertainty

Popis výsledku anglicky

We report on a 88⁢Sr+ single-ion optical clock with an estimated fractional systematic uncertainty of 7.9×10−19. The low uncertainty is enabled by small rf losses, a thorough evaluation of the blackbody-radiation temperature, and our recent measurement of the differential polarizability. A detailed uncertainty evaluation is presented. We also report on two absolute frequency measurements: one against a remote cesium fountain clock, and one against International Atomic Time (TAI). The former lasted 12 d and resulted in a frequency value of 444 779 044 095 485.49(15) Hz. The latter spanned 10 months with monthly optical-clock uptimes between 68% and 99%, and yielded a frequency value of 444 779 044 095 485.373(44) Hz. With a fractional uncertainty of 9.8×10−17, it is, to our knowledge, the most accurate optical frequency measurement reported to date. Both frequency values are in agreement with other recent measurements, providing further evidence that the 2021 CIPM recommended frequency value is too high by 1.6 times its uncertainty.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review Applied

ISSN

2331-7019

e-ISSN

—

Svazek periodika

24

Číslo periodika v rámci svazku

044082

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

26

Strana od-do

1-26

Kód UT WoS článku

001616138900004

EID výsledku v databázi Scopus

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