They achieve quantum entanglement for the quantum internet.

The following scene appears out of the extreme limit of physics, because two photons born in different places from different sources, synchronizing until they share the same quantum state and in an instant the information from one of them passes to the other without any being copied or expanded, that was exactly what a team from the University of Stuttgart managed to do and the impact could rewrite the future of quantum networks.

The research attacked one of the biggest obstacles of long-distance quantum communication, in optical fibers, individual photons are lost along the way and since quantum information cannot be cloned, an impasse arises. How to extend the connection without destroying the data? The theoretical answer was always the quantum repeater, capable of renewing the state through teleportation, but that only works if the photons involved are practically identical, something that two separate sources can rarely offer.

It is at this point where quantum dots come in, small semiconductor islands created on a nanoscale to emit photons on demand. Stutgart joined the Labnis Institute in Drest, which built dots so similar that their differences could barely be measured. According to Peter Michler, it was the first time that quantum information jumped between two photons produced by different dots.

The result, functional teleportation with a slightly higher success rate At 70%, this achievement is added to previous experiments by the same team that had already verified the maintenance of entanglement along 36 km of fiber crossing Stuttgart, now with photons from different sources, finally conversing with each other, the fundamental pieces of the repeaters begin to fit together.

The objective is clear, a quantum infrastructure that connects to current fiber networks, forming the skeleton of the future quantum internet.

Study Source

The images without reference were created with AI

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