A measurement of parity non-conserving optical rotation in atomic lead

Phipp, S J; Edwards, N. H.; Baird, P E G; Nakamura, Shigeru

doi:10.1088/0953-4075/29/9/028

Cited by 30 publications

(25 citation statements)

References 13 publications

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“…Atoms with four valence elections were not much investigated with the precision CI-MBPT method in the literature, with the notable exception being work by Dzuba [6] motivated by the alpha-variation project. Lead is of additional interest to theory due to parity-non-conservation (PNC) fundamental symmetry experiments [10][11][12].…”

Section: Discussionmentioning

confidence: 99%

Configuration-interaction many-body-perturbation-theory energy levels of four-valent Si i

Savukov

2015

Phys. Rev. A

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The mixed configuration-interaction many-body perturbation theory (CI-MBPT) method is accurate in divalent atoms. In more complex atoms, with the number of valence electrons it becomes progressively more difficult to saturate CI space. Here a four-valence electron atom, Si I, is considered. It is found that by using a relatively small cavity of 30 a.u. and by choosing carefully configuration space, it is possible to obtain quite accurate agreement between the theory and experiment. After subtraction of systematic shifts of 481 cm −1 and-426 cm −1 for the lowest even states and odd states respectively,the deviation between theory and experiment becomes at the level of 100 cm −1. This agreement is comparable to that in divalent atoms where the CI saturation has been achieved. It is anticipated that the approach can also give good results for atoms with more valence electrons to be considered in the future.

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Section: Discussionmentioning

confidence: 99%

Configuration-interaction many-body-perturbation-theory energy levels of four-valent Si i

Savukov

2015

Phys. Rev. A

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“…The present discussion follows that of [1]. We compare the sign of the PV-induced term in (12) with the sign of the term that depends on the E dc field as well as the sign of the PV-mimicking term b x e y cot θ. We consider the harmonics ratio r 0 of (12) :…”

Section: ζ/β Sign Determinationmentioning

confidence: 98%

Isotopic variation of parity violation in atomic ytterbium: Description of the measurement method and analysis of systematic effects

et al. 2019

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We present a detailed description of experimental studies of the parity violation effect in an isotopic chain of atomic ytterbium (Yb), whose results were reported in a recent Letter [Antypas et al., Nat. Phys. 15, 120 (2019) [1]]. We discuss the principle of these measurements, made on the Yb 6s 2 1 S0 →5d6s 3 D1 optical transition at 408 nm, describe the experimental apparatus, and give a detailed account of our studies of systematic effects in the experiment. Our results offer the first direct observation of the isotopic variation in the atomic parity violation effect, a variation which is in agreement with the prediction of the Standard Model. These measurements are used to constrain electron-proton and electron-neutron interactions, mediated by a light Z boson.

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“…The situation changed when the Bouchiats [4][5][6] demonstrated that APV effects scale as Z 3 , where Z is the nuclear charge, thus reopening the case for observing them in heavy neutral atoms. Following this discovery, several APV experiments were performed for cesium [7][8][9][10][11], bismuth [12], lead [13,14], thallium [15,16] and ytterbium [17]. New APV experiments are underway or in the planning stage [18][19][20][21][22][23][24][25] (see also the review [26] and references therein), with the aim of attaining a ∼ 0.1% accuracy in 133 Cs.…”

Section: Introductionmentioning

confidence: 99%

Parity-mixed coupled-cluster formalism for computing parity-violating amplitudes

Tan,

Xiao,

Derevianko

2021

Preprint

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We formulate a parity-mixed coupled-cluster (PM-CC) approach for high-precision calculations of parity non-conserving amplitudes in mono-valent atoms. Compared to the conventional formalism which uses parity-proper (PP) one-electron orbitals, the PM-CC method is built using parity-mixed (PM) orbitals. The PM orbitals are obtained by solving the Dirac-Hartree-Fock equation with the electron-nucleus electroweak interaction included (PM-DHF). There are several advantages to such a PM-CC formulation: (i) reduced role of correlations, as for the most experimentally-accurate to date 133 Cs 6S 1/2 − 7S 1/2 transition, the PM-DHF result is only 3% away from the accurate many-body value, while the conventional DHF result is off by 18%; (ii) avoidance of directly summing over intermediate states in expressions for parity non-conserving amplitudes which reduces theoretical uncertainties associated with highly-excited and core-excited intermediate states, and (iii) relatively straightforward upgrade of existing and well-tested large-scale PP-CC codes. We reformulate the CC method in terms of the PM-DHF basis and demonstrate that the cluster amplitudes are complex numbers with opposite parity real and imaginary parts. We then use this fact to map out a strategy through which the new PM-CC scheme may be implemented.

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A measurement of parity non-conserving optical rotation in atomic lead

Cited by 30 publications

References 13 publications

Configuration-interaction many-body-perturbation-theory energy levels of four-valent Si i

Configuration-interaction many-body-perturbation-theory energy levels of four-valent Si i

Isotopic variation of parity violation in atomic ytterbium: Description of the measurement method and analysis of systematic effects

Parity-mixed coupled-cluster formalism for computing parity-violating amplitudes

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