The Bell Pairs are the most critical component of a Quantum communication network.

If you purify the Bell Pairs using Quantum Error Correction then the photons will carry Quantum information over multi hop networks in any of the popular network topologies.

China has already achieved over 12000 km Quantum communication network ,The rest of the world is just heated up ,Time is precious for learning QC Basics...

The book by Nielsen and Chuang will help in understanding QC and the Book 

"Quantum Networking by Rodney Van Meter" will help in understanding QNwkng.

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