Dynamic polarizability measurements with 
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Arnold, K. J.; Kaewuam, R.; Tan, Ting Rei; Porsev, S. G.; Safronova, M. S.; Barrett, M. D.

doi:10.1103/physreva.99.012510

Cited by 10 publications

(11 citation statements)

References 12 publications

(30 reference statements)

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“…As branching fractions provide ratios of matrix elements, all values are tied to the values of P 3/2 r S 1/2 and P 1/2 r S 1/2 reported in [4]. Thus, it would be of interest to confirm those results by a different methodology such as that demonstrated in [31,32]. However, it would likely be difficult to reach a comparable level of accuracy via that approach.…”

Section: Discussionmentioning

confidence: 99%

Branching fractions for P3/2 decays in Ba+

et al. 2020

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Branching fractions for decays from the P 3/2 level in 138 Ba + have been measured with a single laser-cooled ion. Decay probabilities to S 1/2 , D 3/2 and D 5/2 are determined to be 0.741716(71), 0.028031(23) and 0.230253(61), respectively, which are an order of magnitude improvement over previous results. Our methodology only involves optical pumping and state detection, and is hence relatively free of systematic effects. Measurements are carried out in two different ways to check for consistency. Our analysis also includes a measurement of the D 5/2 lifetime, for which we obtain 30.14(40) s.

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Section: Discussionmentioning

confidence: 99%

Branching fractions for P3/2 decays in Ba+

et al. 2020

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“…Results such as these can be factored into other experimental measurements or used as benchmarks against theoretical calculations. Given the combination of measurements and theory used here to provide new estimates of matrix elements, lifetimes, and branching ratios, it would be of interest to directly measure matrix elements by a different methodology such as that demonstrated in [27,28]. This would provide stringent tests of multiple precision measurements and theory.…”

Section: Discussionmentioning

confidence: 99%

Measurements of the branching ratios for 6P1/2 decays in Ba+138

et al. 2019

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Measurement of the branching ratios for 6P 1/2 decays to 6S 1/2 and 5D 3/2 in 138 Ba + are reported with the decay probability from 6P 1/2 to 5D 3/2 measured to be p = 0.268177 ± (37)stat − (20)sys. This result differs from a recent report by 12σ. A detailed account of systematics is given and the likely source of the discrepancy is identified. The new value of the branching ratio is combined with a previous experimental results to give a new estimate of τ = 7.855(10) ns for the 6P 1/2 lifetime. In addition, ratios of matrix elements calculated from theory are combined with experimental results to provide improved theoretical estimates of the 6P 3/2 lifetime and the associated matrix elements. arXiv:1905.06523v1 [physics.atom-ph]

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“…Correlations corrections are very large for the nf Ba + states, which causes convergence issues in the LCC calculations that cannot be fixed with usual stabiliser methods [7]. We use additional fitting for the nf states to resolve this issue ensuring correct energies after the termination of the LCC calculations.…”

Section: Supplemental Materials Calculations Of Ba + Polarizabilitiesmentioning

confidence: 99%

“…As demonstrated with Sr + and Ca + , this has allowed accurate determination of ∆α 0 (0) through suppression of clock frequency shifts arising from induced micromotion [2,3]. Other ion-based clocks have needed to rely on some form of extrapolation from measurements in the near-infrared (NIR) [4,5] and/or by measurement at infrared (IR) wavelengths near to the center of the blackbody spectrum [6][7][8].…”

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confidence: 99%

Polarizability assessments of ion-based optical clocks

2019

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It is shown that the dynamic differential scalar polarisability of the S 1/2 −D 5/2 transition in 138 Ba + can be determined to an inaccuracy below 0.5% across a wide wavelength range (λ > 700 nm). This can be achieved using measurements for which accurate determination of laser intensity is not required, and most of the required measurements are already in the literature. Measurement of a laser-induced ac-stark shift of the clock transition would then provide an in situ measurement of the laser's intensity to the same 0.5% level of inaccuracy, which is not easily achieved by other means. This would allow accurate polarisability measurements for clock transitions in other ions, through comparison with 138 Ba + . The approach would be equally applicable to Sr + and Ca + , with the latter being immediately applicable to Al + /Ca + quantum logic clocks.

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Dynamic polarizability measurements with Lu+176

Cited by 10 publications

References 12 publications

Branching fractions for P3/2 decays in Ba+

Branching fractions for P3/2 decays in Ba+

Measurements of the branching ratios for 6P1/2 decays in Ba+138

Polarizability assessments of ion-based optical clocks

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