| DOI | Trouver le DOI : https://doi.org/10.1088/1681-7575/aca615 |
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| Auteur | Rechercher : Jian, Bin1Identifiant ORCID : https://orcid.org/0000-0002-4588-3957; Rechercher : Bernard, John1; Rechercher : Gertsvolf, Marina1Identifiant ORCID : https://orcid.org/0000-0002-1188-2104; Rechercher : Dubé, Pierre1Identifiant ORCID : https://orcid.org/0000-0003-0133-2165 |
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| Affiliation | - Conseil national de recherches Canada. Centre de recherche en métrologie
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| Format | Texte, Article |
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| Résumé | We report on an improved absolute frequency measurement of the 5s ²S₁/₂ – 4d² D₅/₂ optical transition of a single trapped strontium ion using a Global Positioning System (GPS) link to the SI second. Compared to our previous measurement, the systematic uncertainty of the optical clock has been reduced from 1.5 × 10⁻¹⁷ to 1.2 × 10⁻¹⁷. The measurement campaign was performed over a two-week period in June 2017, with a total measurement time of 92 h. The traceability to the SI second through International Atomic Time was achieved through a GPS link using the Precise Point Positioning method. The dead time uncertainty of the link between the optical clock and the maser was evaluated using standard methods based on a model of the maser noise and on the optical frequency measurement uptimes. The measured frequency of the ⁸⁸Sr⁺ ion 5s²S₁/₂ – 4d²D₅/₂ transition is 444 779 044 095 485.49(19) Hz. This result is in excellent agreement with our previous measurements and the uncertainty has been reduced by almost a factor of four, from a fractional frequency uncertainty of 1.7 × 10⁻¹⁵ to 4.3 × 10⁻¹⁶. |
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| Date de publication | 2023-12-21 |
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| Maison d’édition | IOP |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | d8d3a3aa-2b8e-448b-b1f9-8e6bce07e15d |
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| Enregistrement créé | 2024-07-26 |
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| Enregistrement modifié | 2024-07-26 |
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