This is starting to get real. Interferance is the issue, but not the distance. That is good enough as multiple channels can be surely engineered.
What i look forward to is building a space network of sensors able to be unbreakably locked in synch. A perfect eyeball the size of the solar system.
Lots of other apps of course, but still at the scale of our solar system./
NASA scientists achieve long-distance 'quantum teleportation' over 27 miles for the first time – paving the way for unhackable networks that transfer data faster than the speed of light
Scientists built a 27-mile long prototype quantum internet in the US
They successfully used quantum entanglement to teleport signals instantly
The phenomenon sees qubits, the quantum equivalent of computer bits, pair up and respond instantly
22 December 2020
https://www.dailymail.co.uk/sciencetech/article-9078855/NASA-scientists-achieve-long-distance-quantum-teleportation-time.html
Scientists have demonstrated long-distance 'quantum teleportation' – the instant transfer of units of quantum information known as qubits – for the first time.
The qubits were transferred faster than the speed of light over a distance of 27 miles, laying the foundations for a quantum internet service, which could one day revolutionise computing.
Quantum communication systems are faster and more secure than regular networks because they use photons rather than computer code, which can be hacked.
But their development relies on cutting-edge scientific theory which transforms our understanding of how computers work.
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Pictured, the laser system for the quantum sensors being tested. Researchers found the quantum internet worked over a distance of 27 miles with a fidelity of 90%
In a quantum internet, information stored in qubits (the quantum equivalent of computer bits) is shuttled, or 'teleported', over long distances through entanglement.
Entanglement is a phenomenon whereby two particles are linked in such a way that information shared with one is shared with the other at exactly the same time.
This means that the quantum state of each particle is dependent on the state of the other – even when they are separated by a large distance.
Quantum teleportation, therefore, is the transfer of quantum states from one location to the other.
However, it is highly sensitive to environmental interference that can easily disrupt the quality or 'fidelity' of teleportation, so proving the theory in practice has been technologically challenging.
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