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A Simpler Way to Connect Quantum Computers

photons captured at the wide end of the silicon waveguide are led out to the narrow end while preserving the shape and frequency of the light
Thompson’s team designed a nanoscopic silicon waveguide to capture the photons emitted by the erbium ion and send them as high-fidelity signals over the fiber optic cable. Image courtesy of the researchers

A new atomic device sends high-fidelity quantum information over fiber optic networks. Researchers have a new way to connect quantum devices over long distances, a necessary step toward allowing the technology to play a role in future communications systems.

While today’s classical data signals can get amplified across a city or an ocean, quantum signals cannot. They must be repeated in intervals — that is, stopped, copied and passed on by specialized machines called quantum repeaters...

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