DARIUS: A Digital Twin to Improve the Performance of Quantum Key Distribution

Polarization encoded Quantum Key Distribution (QKD) is attracting great attention as it generates unlimitedly and unconditionally secure keys for different use cases. Despite its theoretical excellence based on quantum physics, commercial optical devices supporting QKD systems lack precision, which...

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Published in:Journal of lightwave technology Vol. 42; no. 5; pp. 1356 - 1367
Main Authors: Ahmadian, Morteza, Ruiz, Marc, Comellas, Jaume, Velasco, Luis
Format: Journal Article
Language:English
Published: New York IEEE 01.03.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Bit error rate
Coding
Digital twins
Eavesdropping
Estimation
Machine learning
Optical components
Optical devices
Optical fiber polarization
Photonics
Polarization
polarization-encoded quantum key distribution (QKD)
Quantum cryptography
quantum digital twin
Quantum theory
Qubit
Qubits (quantum computing)
ISSN:0733-8724, 1558-2213
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Abstract Polarization encoded Quantum Key Distribution (QKD) is attracting great attention as it generates unlimitedly and unconditionally secure keys for different use cases. Despite its theoretical excellence based on quantum physics, commercial optical devices supporting QKD systems lack precision, which highly limits the final Key Exchange Rate (KER) of the system. Beside optical component imperfections, eavesdropping and unpredicted environmental events occurred in the quantum channel increase quantum Bit Error Rate (qBER), which leads to further KER reduction. In this article, we propose DARIUS, a digital twin for polarization encoded QKD systems that bridges the gap between perfect theoretical QKD systems and real implementations to: i ) address optical components' non-ideal behavior; ii ) discern eavesdropping from high qBER; and iii ) dynamically compensate for environmental events. Taking advantage of DARIUS, even moderate eavesdropping rates can be distinguished from qBER. Moreover, significant improvement in proactive environmental event compensation is achieved, as DARIUS can derive proper optical component tuning.
AbstractList Polarization encoded Quantum Key Distribution (QKD) is attracting great attention as it generates unlimitedly and unconditionally secure keys for different use cases. Despite its theoretical excellence based on quantum physics, commercial optical devices supporting QKD systems lack precision, which highly limits the final Key Exchange Rate (KER) of the system. Beside optical component imperfections, eavesdropping and unpredicted environmental events occurred in the quantum channel increase quantum Bit Error Rate (qBER), which leads to further KER reduction. In this article, we propose DARIUS, a digital twin for polarization encoded QKD systems that bridges the gap between perfect theoretical QKD systems and real implementations to: i ) address optical components’ non-ideal behavior; ii ) discern eavesdropping from high qBER; and iii ) dynamically compensate for environmental events. Taking advantage of DARIUS, even moderate eavesdropping rates can be distinguished from qBER. Moreover, significant improvement in proactive environmental event compensation is achieved, as DARIUS can derive proper optical component tuning.
Author Ruiz, Marc
Ahmadian, Morteza
Comellas, Jaume
Velasco, Luis
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  organization: Optical Communication Group, Advanced Broadband Communications Center (CCABA), Universitat Politècnica de Catalunya (UPC), Barcelona, Spain
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Snippet Polarization encoded Quantum Key Distribution (QKD) is attracting great attention as it generates unlimitedly and unconditionally secure keys for different use...
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SubjectTerms Bit error rate
Coding
Digital twins
Eavesdropping
Estimation
Machine learning
Optical components
Optical devices
Optical fiber polarization
Photonics
Polarization
polarization-encoded quantum key distribution (QKD)
Quantum cryptography
quantum digital twin
Quantum theory
Qubit
Qubits (quantum computing)
Title DARIUS: A Digital Twin to Improve the Performance of Quantum Key Distribution
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