New lower bounds on the non-zero capacity of Pauli Channels

Details New lower bounds on the non-zero capacity of Pauli Channels New lower bounds on the non-zero capacity of Pauli Channels

2007-08-13

arxiv.org/abs/0708.1597v3

Phys. Rev. A 78, 062335 (2008)

Physics

Quantum Physics

10 pages, 5 figures, RevTeX4, accepted in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.78.062335

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.

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