| Download | - View final version: On-line estimation of local oscillator noise and optimisation of servo parameters in atomic clocks (PDF, 934 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1088/1681-7575/aa66e9 |
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| Author | Search for: Leroux, Ian D.1; Search for: Scharnhorst, Nils; Search for: Hannig, Stephan; Search for: Kramer, Johannes; Search for: Pelzer, Lennart; Search for: Stepanova, Mariia; Search for: Schmidt, Piet O. |
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| Affiliation | - National Research Council of Canada. Measurement Science and Standards
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| Format | Text, Article |
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| Subject | quantum projection noise; atomic frequency standards; local oscillator noise; servo optimisation |
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| Abstract | For atomic frequency standards in which fluctuations of the local oscillator (LO) frequency are the dominant noise source, we examine the role of the the servo algorithm that predicts and corrects these frequency fluctuations. We derive the optimal linear prediction algorithm, showing how to measure the relevant spectral properties of the noise and optimise servo parameters while the standard is running, using only the atomic error signal. We find that, for realistic LO noise spectra, a conventional integrating servo with a properly chosen gain performs nearly as well as the optimal linear predictor. Using simple analytical models and numerical simulations, we establish optimum probe times as a function of clock atom number and of the dominant noise type in the local oscillator. We calculate the resulting LO-dependent scaling of achievable clock stability with atom number for product states as well as for maximally-correlated states. |
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| Publication date | 2017-03-05 |
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| Publisher | IOP Publishing |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 23003241 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 724b54e8-618e-40d1-96a2-0ed6b8a63f55 |
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| Record created | 2018-05-09 |
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| Record modified | 2020-05-30 |
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