| Télécharger | - Voir le manuscrit accepté : Sr 88 + single-ion optical clock with a stability approaching the quantum projection noise limit (PDF, 412 Ko)
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| DOI | Trouver le DOI : https://doi.org/10.1103/PhysRevA.92.042119 |
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| Auteur | Rechercher : Dubé, Pierre1; Rechercher : Madej, Alan A.1; Rechercher : Shiner, Andrew2; Rechercher : Jian, Bin1 |
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| Affiliation du nom | - Conseil national de recherches du Canada. Science des mesures et étalons
- Conseil national de recherches du Canada. Technologies de sécurité et de rupture
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| Format | Texte, Article |
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| Sujet | clocks; frequency standards; ground state; Allan deviation; clock comparisons; magnetic sublevels; meta-stable state; optical frequency standard; optical standards; state preparation; statistical uncertainty; ions |
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| Résumé | A number of optical frequency standards have been evaluated with fractional uncertainties between 10-17 and 10-18. Reduction of the statistical uncertainty of a clock comparison to this level is challenging, requiring the best possible stability to avoid excessively long averaging times. We report recent improvements of our Sr88+ single-ion standard that have reduced its 1-s Allan deviation from 1×10-14 to 3×10-15, yielding an order of magnitude decrease in averaging time for a given statistical uncertainty level. Among the improvements made are the implementation of a clear-out laser that transfers the ion from the metastable state to the ground state at each cycle, followed by a state preparation step that transfers the ion to the ground-state magnetic sublevel of the probed transition. With these changes, the ion clock transition interacts with the probe laser at every interrogation cycle. The stability of our optical standard is essentially limited by the quantum projection noise for pulse lengths up to ≈100 ms. |
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| Date de publication | 2015-10-25 |
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| Maison d’édition | American Physical Society |
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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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| Numéro NPARC | 21277395 |
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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 | 9034d7ab-a6bd-4a67-a7ff-983027c0dbd2 |
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| Enregistrement créé | 2016-03-09 |
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| Enregistrement modifié | 2020-06-04 |
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