Quantum teleportation achieved using standard fiber optic cables
Northwestern University (USA) engineers have successfully demonstrated quantum teleportation of information through fiber optic cables already used for internet traffic, Kazinform News Agency correspondent reports, citing Northwestern University.
Quantum teleportation relies on the phenomenon of entanglement, where two particles remain connected regardless of the distance between them. Information is not transferred by physically moving particles but through an instant exchange between the entangled particles. It's as if two particles can share information, no matter how far apart they are.
When quantum information is transmitted through fiber optic cables, it is typically carried by special particles of light called photons. The problem is that these photons can get mixed with other light particles carrying regular internet traffic, which can cause the quantum information to "get lost" among the other signals.
To solve this problem, scientists conducted an experiment to understand how light behaves in fiber optics. They selected a specific wavelength that minimizes information loss. Additionally, they developed filters to reduce noise from regular Internet traffic.
The experiment used a 30-kilometer cable, through which both quantum information and regular internet traffic were transmitted simultaneously. The internet speed was extremely high—over 400 Gbps. Despite this, the quantum information was successfully transmitted, demonstrating that this technology can work even with high traffic.
Experiments are planned to be expanded to greater distances using two pairs of entangled photons. There is also consideration for using real underground fiber optic cables. It is expected that quantum teleportation will provide secure communication between remote nodes, with classical and quantum communications coexisting without the need for new infrastructure, as long as the correct wavelengths are chosen.
Earlier it was reported that China’s ‘artificial sun’ starts new experiments with digital twin tech.
