Efficient Atomic Clocks Operated with Several Atomic Ensembles
Open accessAbstract
Atomic clocks are typically operated by locking a local oscillator (LO) to a single atomic ensemble. In this Letter, we propose a scheme where the LO is locked to several atomic ensembles instead of one. This results in an exponential improvement compared to the conventional method and provides a stability of the clock scaling as (αN)(-m/2) with N being the number of atoms in each of the m ensembles and α a constant depending on the protocol being used to lock the LO.
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Two atomic systems can be combined in alternate configurations to decrease QPN.
“Beyond reducing Dick noise, two atomic systems can also be combined in alternate configurations to decrease QPN.”
From Ultrastable optical clock with two cold-atom ensembles (2017) · cites this paper as [27]
Recent proposals use one system in a succession of short interrogation periods to prestabilize the OLO such that a second system can then be interrogated over a longer period than the OLO coherence would otherwise permit.
“Recent proposals use one system in a succession of short interrogation periods to prestabilize the OLO such that a second system can then be interrogated over a longer period than the OLO coherence would otherwise permit 27,28 .”
From Ultrastable optical clock with two cold-atom ensembles (2017) · cites this paper as [27]
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References 25 · Cited by 67
Research works printed but not linked: 5
- N. F. Ramsey, Molecular Beams (Oxford University Press, London, 1956).
- G. Dick, in Proceedings of the Nineteenth Annual Precise Time and Time Interval (PTTI) Applications and Planning Meeting, Redondo Beach, CA, 1987 (Naval Observatory, Washington, DC, 1987), p. 133.
- A. Andre ´, Ph.D. thesis, Harvard University, 2005.
- See Supplemental Material at http://link.aps.org/ supplemental/10.1103/PhysRevLett.111.090802 for details on our numerical simulations and the adaptive protocol.
- J. Borregaard and A. S. Sørensen, arXiv:1304.2288 [Phys. Rev. Lett. (to be published)]. · arXiv
- Authors
- Borregaard, J., & Sørensen, A. S.
- Affiliations
- University of Copenhagen (DK)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2013-08-27
- Volume
- 111
- Issue
- 9
- Pages
- 090802-090802
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1968551136
- Cited by
- 67
- References
- 25
- Citations by year
- 2026: 3 · 2025: 6 · 2024: 14 · 2023: 3 · 2022: 5 · 2021: 3 · 2020: 3 · 2019: 7 · 2018: 1 · 2017: 3 · 2016: 9 · 2015: 4 · 2014: 6
- FWCI
- 3.26
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Physical Review Letters (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Research at the University of Copenhagen (University of Copenhagen) (publishedVersion, other-oa)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Funders
- European Commission (2007–2013, FP/2007-2013)/ERC, FP/2007/2013)
- National Research Foundation
- Danmarks Grundforskningsfond
- Lundbeckfonden
- H. Lundbeck A/S
- FP7 Ideas: European Research Council (306576)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Advanced Frequency and Time Standards
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum optics and atomic interactions
- Keywords
- atomic clocks, clock stability, frequency stabilization, optical frequency standard
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