Sending-or-not-sending twin-field quantum key distribution with redundant space
We propose to adopt redundant space such as polarization mode in the sending-or-not-sending twin-field quantum key Splatter Guard distribution (TF-QKD) in the Fock space.With the help of redundant space such as photon polarization, we can postselect events according to the outcome of the observation to the additional quantity.This compresses the bi