Lower bounds on the nonzero capacity of Pauli channels
Lower bounds on the nonzero capacity of Pauli channels
We study encodings that give the best-known thresholds for the nonzero capacity of quantum channels, i.e., the upper bound for correctable noise, using an entropic approach to calculation of the threshold values. Our results show that Pauli noise is correctable up to the hashing bound. For a depolarizing channel, this …