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Photon Source May Lower Telecom Detector Costs for QKD
In entanglement-based quantum key distribution (QKD), the single-photon detectors represent the largest hardware cost, as both photons of each pair must be detected. A highly nondegenerate photon-pair source, emitting pairs at 548 and 1550 nm, requires a telecom detector on only one arm, potentially reducing costs.
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