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Improvement of Frequency Standards with Quantum Entanglement
Open accessAbstract
The optimal precision of frequency measurements in the presence of decoherence is discussed. We analyze different preparations of $n$ two-level systems as well as different measurement procedures. We show that standard Ramsey spectroscopy on uncorrelated atoms and optimal measurements on maximally entangled states provide the same resolution. The best resolution is achieved using partially entangled preparations with a high degree of symmetry.
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“In the presence of decoherence, the optimal input states do not have an intuitive form and the maximization of the QFI (with rising N) becomes hard even numerically202930.”
From The elusive Heisenberg limit in quantum-enhanced metrology (2012) · cites this paper as [20]
In the citing paper
“environment assisted excitation energy transport in photosynthesis [11, 15, 16], magneto-reception of birds [17-19] and the mechanism underlying olfaction [20, 21], for which there is some compelling theoretical and/or experimental evidence that quantum phenomena are essential for their understanding.”
From Vibrations, quanta and biology (2013) · cites this paper as [15]
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“investigations in quantum biology found that they may enhance transport for example in photosynthetic quantum networks [15, 16].”
From Vibrations, quanta and biology (2013) · cites this paper as [15]
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“the conductivity of the electronic transport network in the FMO complex (quantified as the rate at which the reaction center is populated in steady state divided by the rate at which excitations enter the transport network) exhibits a maximum at a finite dephasing rate”
From Vibrations, quanta and biology (2013) · cites this paper as [15]
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“dephasing noise can actually assist the electronic transport [15, 16].”
From Vibrations, quanta and biology (2013) · cites this paper as [15]
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Metadata
- Authors
- Huelga, S. F., Macchiavello, C., Pellizzari, T., Ekert, A. K., Plenio, M. B., & Cirac, J. I.
- Affiliations
- University of Oxford (GB)
- Universität Innsbruck (AT)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1997-11-17
- Volume
- 79
- Issue
- 20
- Pages
- 3865-3868
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2015876000
- Cited by
- 999
- References
- 10
- Citations by year
- 2026: 38 · 2025: 61 · 2024: 58 · 2023: 36 · 2022: 37 · 2021: 70 · 2020: 63 · 2019: 48 · 2018: 48 · 2017: 49 · 2016: 62 · 2015: 47 · 2014: 59 · 2013: 49 · 2012: 29
- FWCI
- 8.00
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Physical Review Letters (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- University of Hertfordshire Research Archive (University of Hertfordshire) (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- Spiral (Imperial College London) (submittedVersion)
- arXiv (Cornell University)
- Funders
- Royal Society
- Austrian Science Fund
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Advanced Frequency and Time Standards
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
- Keywords
- frequency standards, quantum entanglement, decoherence, Ramsey spectroscopy, two-level system, maximally entangled states, partially entangled states, optimal measurement, frequency resolution, quantum metrology
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