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The Unique Needs of Industry Must Be Considered and May Provide a Solution to Building a Quantum Network

By IQT News posted 07 Sep 2021

(Phys.org) Large-scale quantum networks have been proposed, but so far, they do not exist. Some components of what would make up such networks are being studied, but the control mechanism for such a large-scale network has not been developed. Recently in AVS Quantum Science, investigators outline how a time-sensitive network control plane could be a key component of a workable quantum network.
Quantum networks move quantum bits of information, called qubits, through the network. These qubits are usually photons. Through the quantum phenomena of superposition and entanglement, they can transmit much more information than classical bits, which are limited to logical states of 0 and 1, are able to. Successful long-distance transmission of a qubit requires precise control and timing.
n addition to the well-understood requirements of transmission distance and data rate, for quantum networks to be useful in a real-world setting there are at least two other requirements of industry that need to be considered
One is real-time network control, specifically time-sensitive networking. This control method, which takes network traffic into account, has been used successfully in other types of networks, such as Ethernet.
The second requirement is cost. Large-scale adoption of an industrial quantum network will only happen if costs can be significantly reduced. One way to accomplish cost reduction is with photonic integrated circuits.
Despite the challenges that must be overcome, the researchers believe the industry has the technological ability to build functioning quantum networks.

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