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Likforman, J.-P.; Tugayé, Vincent; Guibal, S.; Guidoni, Luca

doi:10.1103/physreva.93.052507

Cited by 19 publications

(9 citation statements)

References 49 publications

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“…The uncertainty of our results is at a level smaller than the discrepancy between previous experimental and theoretical results, as shown in figure 3. Our value for the P 5 1 2 -S 5 1 2 branching ratio is in agreement with the recent measurement done by Likforman et al [20] with trapped ions, as well as theoretical values of Safronova [1] and Jiang et al [2], while it is 1.9 σ away from the gas discharge chamber experiment by Gallagher [18]. For P 5 3 2 , only the P 5 3 2 -S 5 1 2 branching ratio has been previously reported, also by Gallagher, which our value is in agreement with.…”

Section: Comparison With Previous Worksupporting

confidence: 93%

“…Recent astrophysical studies still use these older experimental results for fitting emission spectra [12,13]. Only in the last decade have there been measurements of branching ratios at the 1% level [19][20][21][22] using trapped ions, which are versatile toolkits for precision spectroscopy [4,15,23] as well as quantum computation [24]. In particular, Ramm et al [19] established a simple method for measuring branching ratios of P 1 2 states in trapped ions with metastable lambda systems.…”

Section: Introductionmentioning

confidence: 99%

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Iterative precision measurement of branching ratios applied to 5Pstates in⁸⁸Sr⁺

et al. 2016

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We report and demonstrate a method for measuring the branching ratios of dipole transitions of trapped atomic ions by performing nested sequences of population inversions. This scheme is broadly applicable to species with metastable lambda systems and can be generalized to find the branching of any state to lowest states. It does not use ultrafast pulsed or narrow linewidth lasers and is insensitive to experimental variables such as laser and magnetic field noise as well as ion heating. To demonstrate its effectiveness, we make the most accurate measurements thus far of the branching ratios of both P 5 1 2 and P 5 3 2 states in 88 Sr + with sub-1% uncertainties. We measure 17.175(27) for the P 5 1 2 -S 5 1 2 branching ratio, 15.845(71) for P 5 3 2 -S 5 1 2 , and 0.056 09(21) for P 5 3 2 -D 4 5 2 . These values represent the first precision measurement for P 5 3 2 -D 4 5 2 , as well as ten-and thirty-fold improvements in precision respectively for P 5 1 2 -S 5 1 2 and P 5 3 2 -S 5 1 2 over the best previous experimental values.

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Section: Comparison With Previous Worksupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Iterative precision measurement of branching ratios applied to 5Pstates in⁸⁸Sr⁺

et al. 2016

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“…The typical background seen in Fig. 2 is significantly below that seen in [7,[17][18][19]. Indeed, the background here is only visible in Fig.…”

Section: Discussionmentioning

confidence: 70%

“…Consequently, we have sought to independently confirm relevant measurements from the literature, which includes a branching ratio measurement for the 6P 1/2 level. The measurement is carried out in a similar manner as for 138 Ba + [7], 40 Ca + [17], 88 Sr + [18,19], and 226 Ra + [20]. However the result differs by approximately 12σ from a previous report in the literature [7].…”

Section: Introductionmentioning

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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“…16 (b) [23]. Fundamentally, three primary steps are involved in quantum computing operation: (1) state initialization, (2) state transition, and (3) state detection [24]. The 422nm laser is used for state initialization to perform Doppler cooling on 88 Sr + ion.…”

Section: Microfabricationmentioning

confidence: 99%

Design and Development of Single-Qubit Ion Trap on Glass and Si Substrates With RF Analysis and Performance Benchmarking

Apriyana

Zhao

et al. 2020

IEEE Trans. Compon., Packag. Manufact. Technol.

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This study presents the design and development of surface electrode ion traps on glass and Si substrate, as well as their RF characterizations and performance benchmarking. In this case, ion-trap on-glass shows superior performances in all necessary criteria. In terms of RF characterizations, ion-traps on glass have Q factor of greater than 900. This is significantly higher than the Q factor of its silicon counterparts, which are around 20 -300. Such a high Q factor results in power spectral density (PSD) of greater than 10W/MHz. On the other hand, iontraps on-silicon produce PSD values of lower than 3W/MHz. In terms of RF performance, ion-trap on-glass shows insertion loss lower than 0.2 dB at 60MHz. This is more superior to insertion loss values of ion-traps on-silicon, which are around 1 -4 dB. The ion-traps metallization is developed using three metallization layers (0.1µm Ti barrier layer, 2.5 -3.7µm Cu, and 0.3µm Au) on top of dielectric. The on-chip resonance condition can be maintained upon the packaging integration. The laser optical setup for ion-trapping is verified to capture single 88 Sr + ion.

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Precision measurement of the branching fractions of the5pP1/22state inSr

Cited by 19 publications

References 49 publications

Iterative precision measurement of branching ratios applied to 5Pstates in⁸⁸Sr⁺

Iterative precision measurement of branching ratios applied to 5Pstates in⁸⁸Sr⁺

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

Design and Development of Single-Qubit Ion Trap on Glass and Si Substrates With RF Analysis and Performance Benchmarking

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Precision measurement of the branching fractions of the5pP1/22state inSr

Cited by 19 publications

References 49 publications

Iterative precision measurement of branching ratios applied to 5Pstates in88Sr+

Iterative precision measurement of branching ratios applied to 5Pstates in88Sr+

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

Design and Development of Single-Qubit Ion Trap on Glass and Si Substrates With RF Analysis and Performance Benchmarking

Contact Info

Product

Resources

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Iterative precision measurement of branching ratios applied to 5Pstates in⁸⁸Sr⁺

Iterative precision measurement of branching ratios applied to 5Pstates in⁸⁸Sr⁺