General sending-or-not-sending twin field protocol for quantum key distribution with asymmetric source parameters
arXiv:1908.05073 · doi:10.1103/PhysRevA.100.062337
Abstract
The sending-or-not-sending (SNS) protocol of the twin-field quantum key distribution (TFQKD) can tolerant large misalignment error and its key rate can exceed the bound of repeaterless QKD. But the original SNS protocol requires the two users to use the same source parameters. Here we propose a general protocol with asymmetric source parameters and give the security proof of this protocol. Our general protocol has a much better performance than that of the original SNS protocol when the channel of the system is asymmetric.
submitted to PRA on Aug. 12
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