| NEUMANN, S.P., T. SCHEIDL, M. SELIMOVIC, Matej PIVOLUSKA, B. LIU, M. BOHMANN and R. URSIN. Model for optimizing quantum key distribution with continuous-wave pumped entangled-photon sources. Physical review A. New York: The American Physical Society, 2021, vol. 104, No 2, p. 022406-22416. ISSN 2469-9926. Available from: https://dx.doi.org/10.1103/PhysRevA.104.022406. |
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@article{1787480,
author = {Neumann, S.P. and Scheidl, T. and Selimovic, M. and Pivoluska, Matej and Liu, B. and Bohmann, M. and Ursin, R.},
article_location = {New York},
article_number = {2},
doi = {http://dx.doi.org/10.1103/PhysRevA.104.022406},
keywords = {quantum key distribution; entanglement; continuous wave sources},
language = {eng},
issn = {2469-9926},
journal = {Physical review A},
title = {Model for optimizing quantum key distribution with continuous-wave pumped entangled-photon sources},
url = {https://journals.aps.org/pra/abstract/10.1103/PhysRevA.104.022406},
volume = {104},
year = {2021}
}
TY - JOUR
ID - 1787480
AU - Neumann, S.P. - Scheidl, T. - Selimovic, M. - Pivoluska, Matej - Liu, B. - Bohmann, M. - Ursin, R.
PY - 2021
TI - Model for optimizing quantum key distribution with continuous-wave pumped entangled-photon sources
JF - Physical review A
VL - 104
IS - 2
SP - 022406
EP - 022406
PB - The American Physical Society
SN - 24699926
KW - quantum key distribution
KW - entanglement
KW - continuous wave sources
UR - https://journals.aps.org/pra/abstract/10.1103/PhysRevA.104.022406
N2 - 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.
ER -
NEUMANN, S.P., T. SCHEIDL, M. SELIMOVIC, Matej PIVOLUSKA, B. LIU, M. BOHMANN and R. URSIN. Model for optimizing quantum key distribution with continuous-wave pumped entangled-photon sources. \textit{Physical review A}. New York: The American Physical Society, 2021, vol.~104, No~2, p.~022406-22416. ISSN~2469-9926. Available from: https://dx.doi.org/10.1103/PhysRevA.104.022406.
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