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Quantum entanglement can multiply a network's capacity 88-fold?

Yuhang Yao, Syed A. Jafar

June 3, 2026

Previous results suggested quantum entanglement only nudges classical communication capacity up by a few percent. This work shows that when senders know the channel state in real time, entanglement shared among transmitters can multiply total capacity by factors exceeding 88× (with just 7 users and binary signals), with gains that grow exponentially as more users are added. The advantage survives substantial noise — even if 30% of the entangled qubits are completely scrambled.
Published as Unlocking Exponential and Unbounded Robust Gains in Shannon Capacity of Classical Multiple Access Channels with Causal CSIT via Quantum Entanglement Assistance arXiv:2606.05412
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