Giulio Chiribella, Michele Dall'Arno, Giacomo Mauro D'Ariano, Chiara Macchiavello, Paolo Perinotti
Published 2010-07-21, updated 2011-05-16Version 2
We introduce a quantum packing bound on the minimal resources required by nondegenerate error correction codes for any kind of noise. We prove that degenerate codes can outperform nondegenerate ones in the presence of correlated noise, by exhibiting examples where the quantum packing bound is violated.
Comments: 5 pages, published version
Journal: Phys. Rev. A 83, 052305 (2011)
Decoherence by Correlated Noise and Quantum Error Correction
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