Vacuum tubes can open new paths for quantum communication.

"Researchers outlined a new method to build a quantum network that spans the country by using vacuum beam guides, in which qubits can travel thousands of miles inside small vacuum-sealed tubes. Credit: SciTechDaily.com. (Scitech.Daily/ From Sci-Fi to Reality: Vacuum Tubes Could Revolutionize Quantum Networking

Vacuum is a good tool to protect information and keep the system's temperature low. If the superconducting computers are in a thermos bottle there is a vacuum in their walls, that helps to keep the temperature low in the liquid nitrogen, which is suitable for the superconducting computers.

The other thing is this. Vacuum offers a dirt-free area for the photonic computers. In some visions, the photonic computers are in vacuum boxes. And that offers a stable environment for those machines. Air molecules will not disturb laser rays that can operate through the vacuum. The liquid gas like nitrogen is used in the cooling systems.

But in the photonic computers, the laser ray can also travel in vacuum tubes. Those vacuum tubes can protect laser rays from outside effects. And in the most interesting visions, quantum computers can also be in the vacuum. The system makes quantum entanglement through nanotubes, and the quantum system operates in a vacuum, which minimizes the outcoming effects.

In some models, communication cables should go in vacuum tubes. A vacuum is a good insulator that keeps the cable in stable condition. Another thing is that the vacuum can offer a thermos-solution for superconducting cables and that helps to keep temperature in the system low. The vacuum chamber also helps to detect, if somebody tries to get data, that travels in wire in the wrong hands.

To steal information, the eavesdropper must get the sensor close enough to the wire. For that thing, the eavesdropper must break the shell. And that fills the vacuum. In that case, the pressure sensor tells that somebody is trying to steal information.

There are no molecules in a vacuum. Dust doesn't flow in vacuum tubes. And that makes those channels ideal for quantum communication. The clean channel makes laser rays travel in them without disturbing scattering. If outside sensors don't see the laser ray, they cannot get messages in their hands. And that thing makes the vacuum tubes a good tool for protecting and delivering information in new types of quantum systems.

https://scitechdaily.com/from-sci-fi-to-reality-vacuum-tubes-could-revolutionize-quantum-networking/

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