PM-QKD experiment surpasses the linear rate-transmittance bound at 302 and 402 km, and achieves a positive key rate at 502 km.
According to the security analysis in Ref
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Surpassing the rate-transmittance linear bound of quantum key distribution
PM-QKD experiment surpasses the linear rate-transmittance bound at 302 and 402 km, and achieves a positive key rate at 502 km.