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- W1979804579 abstract "We provide a general formalism to characterize the cryptographic properties of quantum channels in the realistic scenario where the two honest parties employ prepare and measure protocols and the known two-way communication reconciliation techniques. We obtain a necessary and sufficient condition to distill a secret key using this type of schemes for Pauli qubit channels and generalized Pauli channels in higher dimension. Our results can be applied to standard protocols such as BB84 or six-state, giving a critical error rate of 20% and 27.6%, respectively. We explore several possibilities to enlarge these bounds, without any improvement. These results suggest that there may exist weakly entangling channels useless for key distribution using prepare and measure schemes." @default.
- W1979804579 created "2016-06-24" @default.
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- W1979804579 date "2007-01-26" @default.
- W1979804579 modified "2023-10-18" @default.
- W1979804579 title "Key distillation from quantum channels using two-way communication protocols" @default.
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- W1979804579 doi "https://doi.org/10.1103/physreva.75.012334" @default.
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