Model for optimizing quantum key distribution with continuous-wave pumped entangled-photon sources
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14610%2F21%3A00122150" target="_blank" >RIV/00216224:14610/21:00122150 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/pra/abstract/10.1103/PhysRevA.104.022406" target="_blank" >https://journals.aps.org/pra/abstract/10.1103/PhysRevA.104.022406</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevA.104.022406" target="_blank" >10.1103/PhysRevA.104.022406</a>
Alternative languages
Result language
angličtina
Original language name
Model for optimizing quantum key distribution with continuous-wave pumped entangled-photon sources
Original language description
Quantum key distribution (QKD) allows unconditionally secure communication based on the laws of quantum mechanics rather than assumptions about computational hardness. Optimizing the operation parameters of a given QKD implementation is indispensable in order to achieve high secure key rates. So far, there exists no model that accurately describes entanglement-based QKD with continuous-wave pump lasers. We analyze the underlying mechanisms for QKD with temporally uniform pair-creation probabilities and develop a simple but accurate model to calculate optimal tradeoffs for maximal secure key rates. In particular, we find an optimization strategy of the source brightness for given losses and detection-time resolution. All experimental parameters utilized by the model can be inferred directly in standard QKD implementations, and no additional assessment of device performance is required. Comparison with experimental data shows the validity of our model. Our results yield a tool to determine optimal operation parameters for already existing QKD systems, to plan a full QKD implementation from scratch, and to determine fundamental key rate and distance limits of given connections.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical review A
ISSN
2469-9926
e-ISSN
2469-9934
Volume of the periodical
104
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
022406
UT code for WoS article
000681426600003
EID of the result in the Scopus database
2-s2.0-85112365250