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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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Modeling a measurement-device-independent quantum key distribution system.

P Chan, J A Slater, I Lucio-Martinez

|June 13, 2014

Summary

A new mathematical model for measurement-device-independent quantum key distribution (MDI-QKD) accurately predicts experimental results. This model optimizes performance and secret key rates for MDI-QKD systems.

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Area of Science:

Quantum Information Science
Quantum Cryptography
Mathematical Modeling

Background:

Quantum Key Distribution (QKD) offers secure communication.
Measurement-Device-Independent (MDI) QKD protocols enhance security by removing detector vulnerabilities.
Accurate mathematical models are crucial for optimizing QKD system performance.

Purpose of the Study:

To develop and validate a widely applicable mathematical model for MDI-QKD systems.
To optimize the performance of MDI-QKD systems, specifically focusing on secret key rates.
To identify performance bottlenecks and project future capabilities of MDI-QKD technology.

Main Methods:

Development of a comprehensive mathematical model for MDI-QKD.
Experimental validation of the model using a proof-of-principle time-bin qubit-based MDI-QKD system.
Testing the system's resilience to environmental perturbations over deployed fiber.

Main Results:

The mathematical model demonstrated excellent agreement with experimental data.
The model enables optimization of mean photon numbers for improved secret key rates.
The MDI-QKD system's performance remained unaffected by environment-induced perturbations in deployed fiber.

Conclusions:

The validated mathematical model is a powerful tool for enhancing MDI-QKD systems.
The model facilitates optimization of key rates, component identification, and future performance projections.
MDI-QKD systems show robustness in real-world fiber optic deployments.