dorsal/arxiv
View SchemaHigh-accuracy calculation of black-body radiation shift in $^{133}$Cs primary frequency standard
| Authors | K. Beloy, U. I. Safronova, A. Derevianko |
|---|---|
| Categories | |
| ArXiv ID | physics/0606048 |
| URL | https://arxiv.org/abs/physics/0606048 |
| DOI | 10.1103/PhysRevLett.97.040801 |
Abstract
Black-body radiation (BBR) shift is an important systematic correction for the atomic frequency standards realizing the SI unit of time. Presently, there is a controversy over the value of the BBR shift for the primary $^{133}$Cs standard. At room temperatures the values from various groups differ at $3 \times 10^{-15}$ level, while the modern clocks are aiming at $10^{-16}$ accuracies. We carry out high-precision relativistic many-body calculations of the BBR shift. For the BBR coefficient $\beta$ at $T=300K$ we obtain $\beta=-(1.708\pm0.006) \times 10^{-14}$, implying $6 \times 10^{-17}$ fractional uncertainty. While in accord with the most accurate measurement, our 0.35%-accurate value is in a substantial, 10%, disagreement with recent semi-empirical calculations. We identify an oversight in those calculations.
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"abstract": "Black-body radiation (BBR) shift is an important systematic correction for\nthe atomic frequency standards realizing the SI unit of time. Presently, there\nis a controversy over the value of the BBR shift for the primary $^{133}$Cs\nstandard. At room temperatures the values from various groups differ at $3\n\\times 10^{-15}$ level, while the modern clocks are aiming at $10^{-16}$\naccuracies. We carry out high-precision relativistic many-body calculations of\nthe BBR shift. For the BBR coefficient $\\beta$ at $T=300K$ we obtain\n$\\beta=-(1.708\\pm0.006) \\times 10^{-14}$, implying $6 \\times 10^{-17}$\nfractional uncertainty. While in accord with the most accurate measurement, our\n0.35%-accurate value is in a substantial, 10%, disagreement with recent\nsemi-empirical calculations. We identify an oversight in those calculations.",
"arxiv_id": "physics/0606048",
"authors": [
"K. Beloy",
"U. I. Safronova",
"A. Derevianko"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevLett.97.040801",
"title": "High-accuracy calculation of black-body radiation shift in $^{133}$Cs primary frequency standard",
"url": "https://arxiv.org/abs/physics/0606048"
},
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