Linear Paul trap design for an optical clock with Coulomb crystals

Herschbach, N.; Pyka, Karsten; Keller, Jonas; Mehlstäubler, T. E.

doi:10.1007/s00340-011-4790-y

Cited by 74 publications

(115 citation statements)

References 44 publications

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“…(1) as compared to neutral atom clocks where N can easily approach or exceed 10 4 . On the other hand, particular optical transitions in ions like Al + [9] are extremely insensitive to external perturbations, e.g., the electromagnetic radiation of the ambient temperature field [10]. It is therefore presently not clear which type of clocks will eventually be the best one for a redefinition of the ) Fractional uncertainty of primary caesium atomic clocks to realise the second in the SI (squares) and optical frequency standards (dots).…”

Section: Introductionmentioning

confidence: 96%

Towards a redefinition of the second based on optical atomic clocks

Riehle

2015

Comptes Rendus. Physique

141

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Future redefinition of the second Frequency and time dissemination Mots-clés :Horloges optiques atomiques Étalons de fréquence Redéfinition future de la seconde Diffusion des fréquences et des signaux horairesThe rapid increase in accuracy and stability of optical atomic clocks compared to the caesium atomic clock as the primary standard of time and frequency asks for a future redefinition of the second in the International System of Units (SI). The status of the optical clocks based on either single ions in radio-frequency traps or on neutral atoms stored in an optical lattice is described, with special emphasis on the current work at the Physikalisch-Technische Bundesanstalt (PTB, Braunschweig, Germany). Besides the development and operation of different optical clocks with estimated fractional uncertainties in the 10 −18 range, the supporting work on ultra-stable lasers as core elements and the means to compare remote optical clocks with transportable standards, optical fibres, or frequency ratios is reported. Finally, the conditions, methods and next steps are discussed, which are the prerequisites for a future redefinition of the second. © 2015 Académie des sciences. Published by Elsevier Masson SAS. All rights reserved.r é s u m é L'amélioration rapide en termes de précision et de stabilité des horloges atomiques optiques par rapport à l'horloge atomique au césium, qui constitue la référence primaire pour le temps et la fréquence, appelle une future redéfinition de la seconde dans le système international d'unités (SI). L'état d'avancement des horloges optiques basées sur des ions uniques dans des pièges radiofréquence ou sur des atomes neutres confinés dans le réseau optique est décrit, en insistant particulièrement sur le travail en cours à la PhysikalischTechnische Bundesanstalt (PTB, Brunswick, Allemagne). À côté du développement et de la mise en oeuvre de différentes horloges optiques avec des incertitudes fractionnelles estimées d'un ordre de grandeur de 10 −18 , les travaux sous-jacents sur les lasers ultra-stables comme éléments centraux ainsi que les moyens de comparer les horloges optiques lointaines avec des étalons transportables, des fibres optiques ou des rapports de fréquence * 507 sont exposés. Finalement, les conditions, les méthodes et les prochaines étapes sont discutées, qui sont des prérequis à une redéfinition de la seconde.

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Section: Introductionmentioning

confidence: 96%

Towards a redefinition of the second based on optical atomic clocks

Riehle

2015

Comptes Rendus. Physique

141

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“…Indeed, for the Al + clock, micromotion is a dominant factor in the overall error budget [1]. We note that consideration has been given to clocks based on small strings of less than 10 ions stored in linear radio-frequency (RF) traps [11].…”

Section: Introductionmentioning

confidence: 99%

Prospects for atomic clocks based on large ion crystals

et al. 2015

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We investigate the feasibility of precision frequency metrology with large ion crystals. For clock candidates with a negative differential static polarisability, we show that micromotion effects should not impede the performance of the clock. Using Lu + as a specific example, we show that quadrupole shifts due to the electric fields from neighbouring ions do not significantly affect clock performance. We also show that effects from the tensor polarisability can be effectively managed with a compensation laser at least for a small number of ions ( 10 3 ). These results provide new possibilities for ion-based atomic clocks, allowing them to achieve stability levels comparable to neutral atoms in optical lattices and a viable path to greater levels of accuracy.

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“…Our target is the 115 In + , which is one of the candidates for single-ion optical clocks included in Dehmelt's original proposal [4]. Recent proposals on the In + optical clocks estimate fractional frequency inaccuracy of 10 −18 level owing to its small black body radiation shift [11,12]. Previously, implementation of the In + clock has been investigated using relatively weak 1 S 0 -3 P 1 transition at 230 nm for detection, but its performance was limited to 10 −13 level [22,23].…”

Section: Single Ion Detection With a Quasi-cw Vuv Beammentioning

confidence: 99%

Generation of vacuum ultraviolet radiation by intracavity high-harmonic generation toward state detection of single trapped ions

2014

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VUV radiation around 159 nm is obtained toward direct excitation of a single trapped 115 In +ion. An efficient fluoride-based VUV output-coupler is employed for intracavity high-harmonic generation of a Ti:S oscillator. Using this coupler, where we measured its reflectance to be about 90 %, an average power reaching 6.4 µW is coupled out from a modest fundamental power of 650 mW. When a single comb component out of 1.9 × 10 5 teeth is resonant to the atomic transition, hundreds of fluorescence photons per second will be detectable under a realistic condition.

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Linear Paul trap design for an optical clock with Coulomb crystals

Cited by 74 publications

References 44 publications

Towards a redefinition of the second based on optical atomic clocks

Towards a redefinition of the second based on optical atomic clocks

Prospects for atomic clocks based on large ion crystals

Generation of vacuum ultraviolet radiation by intracavity high-harmonic generation toward state detection of single trapped ions

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