Precision measurement of the 
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 ground-state hyperfine constant

Xu, Zhilin; Deng, Ke; Che, Hao; Yuan, Wenhao; Zhang, Jie; Lu, Zehuang

doi:10.1103/physreva.96.052507

Cited by 10 publications

(11 citation statements)

References 25 publications

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“…5. The A ′ hf s value presented here is in good agreement with both of the results from low-field traps [20,22]. All three measurements performed in RF traps agree with each other within the quoted uncertainties and are all ≈ 2σ combined higher than the previous Penning trap measurement [21].…”

Section: Theoretical Calculation Of Thesupporting

confidence: 87%

“…This is the dominant systematic uncertainty, leading to a final result of ∆W/h = 1 788 762 752.85 (13) Hz. Previous work has reported a hyperfine constant A hf s based on measurement of ∆W [21,22]. At the level of accuracy reported here, however, translating ∆W to the conventional A hf s constant requires accounting for higher order effects of the hyperfine interaction.…”

Section: Ac Quadratic Zeeman Shift and 25 Mg + Magnetic Constantsmentioning

confidence: 70%

“…The Penning trap results for the hyperfine constant and nuclear-toelectronic g-factor ratio are A ′ hf s = −596 254 376(54) Hz, and g I /g J = 9.299 484(75) × 10 −5 . More recently, A ′ hf s has been measured in RF traps that employ a low bias magnetic field (≈ 0.1 mT) [20,22]. In the recent publication by Xu et al [22], ν 0,0 was measured using microwave Rabi spectroscopy.…”

Section: Theoretical Calculation Of Thementioning

confidence: 99%

“…More recently, A ′ hf s has been measured in RF traps that employ a low bias magnetic field (≈ 0.1 mT) [20,22]. In the recent publication by Xu et al [22], ν 0,0 was measured using microwave Rabi spectroscopy. The result is A ′ hf s = −596 254 248.7(4.2) Hz, where the uncertainty is dominated by an AC stark shift resulting from residual Doppler cooling light that is not fully extinguished during the frequency measurement.…”

Section: Theoretical Calculation Of Thementioning

confidence: 99%

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Measurements ofAl+27andMg+25magnetic constants for improved ion-clock accuracy

et al. 2019

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We have measured the quadratic Zeeman coefficient for the 1 S0 ↔ 3 P0 optical clock transition in 27 Al + , C2 = −71.944(24) MHz/T 2 , and the unperturbed hyperfine splitting of the 25 Mg + 2 S 1/2 ground electronic state, ∆W/h = 1 788 762 752.85(13) Hz, with improved uncertainties. Both constants are relevant to the evaluation of the 27 Al + quantum-logic clock systematic uncertainty. The measurement of C2 is in agreement with a previous measurement and a new calculation at the 1 σ level. The measurement of ∆W is in good agreement with a recent measurement and differs from a previously published result by approximately 2σ. With the improved value for ∆W , we deduce an improved value for the nuclear-to-electronic g-factor ratio gI /gJ = 9.299 308 313(60) × 10 −5 and the nuclear g-factor for the 25 Mg nucleus gI = 1.861 957 82(28) × 10 −4 . Using the values of C2 and ∆W presented here, we derive a quadratic Zeeman shift of the 27 Al + quantum-logic clock of ∆ν/ν = −(9241.8 ± 3.7) × 10 −19 , for a bias magnetic field of B ≈ 0.12 mT.

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Section: Theoretical Calculation Of Thesupporting

confidence: 87%

Section: Ac Quadratic Zeeman Shift and 25 Mg + Magnetic Constantsmentioning

confidence: 70%

Section: Theoretical Calculation Of Thementioning

confidence: 99%

Section: Theoretical Calculation Of Thementioning

confidence: 99%

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Measurements ofAl+27andMg+25magnetic constants for improved ion-clock accuracy

et al. 2019

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“…As described previously [43][44][45], a linear Paul trap is used to trap the 25 trapped ions and the end-cap electrodes supply the axial confinement. The distance from the center of the trap to the blade electrodes is r 0 = 0.8 mm, and the radius of curvature of the blades is r e = 0.3 mm and the collection solid angle is 0.8 sr [43].…”

mentioning

confidence: 99%

Raman sideband cooling of $^{25}$Mg$^+$ -$^{27}$Al$^+$ ions pair and observation of quantum logic spectra

Liu¹,

Xu²,

Ma³

et al. 2019

Preprint

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We perform quantum logic spectroscopy (QLS) on 27 Al + ion 1 S0 -3 P1 transition, which is an important step toward the QLS based 27 Al + ion optical clock. As a precondition of QLS, both the stretch (STR) mode and the common (COM) mode of the 27 Al + and 25 Mg + ions pair are cooled to the vibrational ground state by Raman sideband cooling. The mean phonon number is measured to be 0.10(1) for the STR mode and 0.01(1) for the COM mode, respectively. The heating rate is evaluated to be 13(3) phonons/s for the STR mode and 5.5(1) phonons/s for the COM mode.

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Investigation of experimental issues concerning successful operation of quantum-logic-based $$^{27}\hbox {Al}^+$$ ion optical clock

Liu

Wei

et al. 2020

Appl. Phys. B

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Precision measurement of the Mg+25 ground-state hyperfine constant

Cited by 10 publications

References 25 publications

Measurements ofAl+27andMg+25magnetic constants for improved ion-clock accuracy

Measurements ofAl+27andMg+25magnetic constants for improved ion-clock accuracy

Raman sideband cooling of $^{25}$Mg$^+$ -$^{27}$Al$^+$ ions pair and observation of quantum logic spectra

Investigation of experimental issues concerning successful operation of quantum-logic-based $$^{27}\hbox {Al}^+$$ ion optical clock

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