Towards Digital-Twin Assisted Software-Defined Quantum Satellite Networks

Area of Science:

• Quantum communication networks
• Satellite network engineering
• Quantum information science

Background:

• Classical optical fibers are limited to urban areas for quantum communication.
• A Quantum Satellite Backbone (QSB) is proposed to overcome distance limitations.
• Dynamic satellite network management poses significant design challenges.

Purpose of the Study:

• To design a Quantum Satellite Backbone (QSB) integrating Digital Twin (DT) and Software-Defined Networking (SDN).
• To develop a DT monitoring protocol for efficient status recovery and End-to-End (E2E) entanglement creation.
• To evaluate the performance of the proposed QSB system.

Main Methods:

• Designed an ad hoc QSB architecture incorporating DT and SDN principles.
• Developed and implemented a DT monitoring protocol for network status.
• Evaluated system performance through path monitoring, configuration time, E2E entanglement establishment time, and fidelity between Ground Stations (GSs).

Main Results:

• The DT-SDN integrated QSB architecture facilitates efficient network management.
• The DT monitoring protocol enables rapid status recovery for reliable E2E entanglement.
• Performance evaluation demonstrated effective path monitoring, configuration, and entanglement establishment.

Conclusions:

• The proposed QSB design effectively overcomes the limitations of optical fibers for quantum communication.
• The integration of Digital Twin and Software-Defined Networking is crucial for managing dynamic satellite quantum networks.
• This approach enables robust and efficient creation of End-to-End entanglement states for a future Quantum Internet.