Optical Telecom Networks as Weak Quantum Measurements with Postselection
Open accessAbstract
We show that weak measurements with postselection, proposed in the context of the quantum theory of measurement, naturally appear in the everyday physics of fiber optics telecom networks through polarization-mode dispersion (PMD) and polarization-dependent losses (PDL). Specifically, the PMD leads to a time-resolved discrimination of polarization; the postselection is done in the most natural way: one postselects those photons that have not been lost because of the PDL. The quantum formalism is shown to simplify the calculation of optical networks in the telecom limit of weak PMD.
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A dichroic optical element necessarily performs a kind of post-selective measurement [16].
“Actually, it has been already noticed that a dichroic optical element necessarily performs a kind of post-selective measurement ͓16͔.”
From Linear optics and quantum maps (2007) · cites this paper as [16]
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- Authors
- Brunner, N., Acín, A., Collins, D., Gisin, N., & Scarani, V.
- Affiliations
- University of Geneva (CH)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2003-10-28
- Volume
- 91
- Issue
- 18
- Pages
- 180402-180402
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2006917527
- Cited by
- 86
- References
- 13
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 3 · 2023: 3 · 2022: 4 · 2021: 2 · 2020: 5 · 2019: 1 · 2018: 3 · 2017: 2 · 2016: 4 · 2015: 3 · 2014: 4 · 2013: 3 · 2012: 4
- FWCI
- 4.22
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- Bristol Research (University of Bristol) (publishedVersion)
- Archive ouverte UNIGE (University of Geneva) (publishedVersion, other-oa)
- arXiv (Cornell University) (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Optical Network Technologies
- Keywords
- weak measurement, post-selection, polarization mode dispersion, polarization-dependent loss, optical fiber communication, quantum measurement theory, photon loss, polarization discrimination
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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