We study encodings that give the best known thresholds for the non-zero 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 approach allows one to achieve a non-zero capacity for a fidelity (probability of no error) of f=0.80870.
@article{arxiv.0708.1597,
title = {New lower bounds on the non-zero capacity of Pauli Channels},
author = {Jesse Fern and K. Birgitta Whaley},
journal= {arXiv preprint arXiv:0708.1597},
year = {2009}
}
Comments
10 pages, 5 figures, RevTeX4, accepted in Phys. Rev. A