Researchers from Toshiba have successfully sent quantum information over 600-kilometer-long optical fibers, creating a new distance record and paving the way for large-scale quantum networks that could be used to exchange information securely between cities and even countries. Working from the company’s R&D lab in Cambridge in the UK, the scientists demonstrated that they could transmit quantum bits (or qubits) over hundreds of kilometers of optical fiber without scrambling the fragile quantum data encoded in the particles, thanks to a new technology that stabilizes the environmental fluctuations occurring in the fiber.
This is great news. Always glad to hear and read about quantum advances. This one is particularly great because, previously, the record for "bounded" qubit network media transmission was 100km/62 miles. So, this is great to hear, and I hope this is just the beginning of many longer distance records. Kudos to Toshiba!
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