Performance Analysis of MDI-QKD in Thermal-Loss and Phase Noise Channels

[en] Measurement-device-independent quantum key distribution (MDI-QKD), enhances quantum cryptography by mitigating detector-side vulnerabilities. This study analyzes MDI-QKD performance in thermal-loss and phase noise channels, modeled as depolarizing and dephasing channels to capture thermal and phase noise effects. Based on this channel framework, we derive analytical expressions for Bell state measurement probabilities, quantum bit error rates (QBER), and secret key rates (SKR) of MDI-QKD. Our simulations reveal that SKR decreases exponentially with transmission distance, with performance further degraded by increasing thermal noise and phase noise, particularly under high thermal noise conditions. These findings offer insights into enhancing MDI-QKD's noise resilience, supporting secure key generation in practical, noisy environments.

Disciplines :

Physics

Author, co-author :

PENG, Heyang ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom

KOUDIA, Seid ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom

OLEYNIK, Leonardo ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom

CHATZINOTAS, Symeon ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom

External co-authors :

Language :

English

Title :

Performance Analysis of MDI-QKD in Thermal-Loss and Phase Noise Channels

Publication date :

In press

Event name :

IEEE International Conference on Quantum Computing and Engineering (QCE 2025)

Event organizer :

IEEE Computer Society

Event place :

Albuquerque, United States

Event date :

from 31 August to 5 September 2025

Audience :

International

Main work title :

Proceedings of the IEEE International Conference on Quantum Computing and Engineering (QCE 2025)

Publisher :

IEEE, Piscataway, NJ, United States

Peer reviewed :

Peer reviewed

Commentary :

8 pages, 3 figures, 1 table, 1 appendix. Accepted by IEEE International Conference on Quantum Computing and Engineering (QCE)

Available on ORBilu :

since 24 October 2025

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