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A quantum-entangled photon traveled 35 kilometers under the streets of Boston
AWS and Harvard put quantum networks under Boston.
Researchers from Harvard and Amazon’s AWS Center for Quantum Networking put a set of nodes around the Boston area to build a network capable of “efficiently catching, storing, and transferring information initially stored in light.” Like the internet we know, quantum networks send information carried by light — in this case, quantum-entangled photons. During their experiments, the team took a qubit encoded into a photon and bounced it off a quantum memory in a Harvard lab. The (now telecom-frequency) photon then makes a round trip through an underground fiber network before returning to Harvard, where it is converted back to visible frequency.
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