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Photon Flux and Distance from the Source: Consequences for Quantum Communication
Linnaeus University, Faculty of Technology, Department of Mathematics.ORCID iD: 0000-0002-9857-0938
Linnaeus University, Faculty of Technology, Department of Mathematics.
Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.ORCID iD: 0000-0002-7018-6248
Russian Acad Sci.
2014 (English)In: Foundations of physics, ISSN 0015-9018, E-ISSN 1572-9516, Vol. 44, no 4, 389-405 p.Article in journal (Refereed) Published
Abstract [en]

The paper explores the fundamental physical principles of quantum mechanics (in fact, quantum field theory) that limit the bit rate for long distances and examines the assumption used in this exploration that losses can be ignored. Propagation of photons in optical fibers is modelled using methods of quantum electrodynamics. We define the "photon duration" as the standard deviation of the photon arrival time; we find its asymptotics for long distances and then obtain the main result of the paper: the linear dependence of photon duration on the distance when losses can be ignored. This effect puts the limit to joint increasing of the photon flux and the distance from the source and it has consequences for quantum communication. Once quantum communication develops into a real technology (including essential decrease of losses in optical fibres), it would be appealing to engineers to increase both the photon flux and the distance. And here our "photon flux/distance effect" has to be taken into account. This effect also may set an additional constraint to the performance of a loophole free test of Bell's type-to close jointly the detection and locality loopholes.

Place, publisher, year, edition, pages
2014. Vol. 44, no 4, 389-405 p.
Keyword [en]
Photon propagation, Optical fibre, Photon duration, Linear dependence of photon duration on the distance, Loophole free Bell test, Photon flux/distance effect
National Category
Physical Sciences
Research subject
Natural Science, Physics
Identifiers
URN: urn:nbn:se:lnu:diva-36102DOI: 10.1007/s10701-014-9786-0ISI: 000336411400003OAI: oai:DiVA.org:lnu-36102DiVA: diva2:734445
Available from: 2014-07-17 Created: 2014-07-17 Last updated: 2017-01-10Bibliographically approved

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Khrennikov, AndreiNilsson, BörjeNordebo, Sven
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CiteExportLink to record
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Citation style
  • apa
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