Coherence in quantum error-correcting codes

  title={Coherence in quantum error-correcting codes},
  author={Stefanie J. Beale and Joel J. Wallman and Mauricio Guti'errez and Kenneth R. Brown and Raymond Laflamme},
Typical studies of quantum error correction assume probabilistic Pauli noise, largely because it is relatively easy to analyze and simulate. Consequently, the effective logical noise due to physically realistic coherent errors is relatively unknown. Here, we prove that encoding a system in a stabilizer code and measuring error syndromes decoheres errors, that is, causes coherent errors to converge toward probabilistic Pauli errors, even when no recovery operations are applied. Two practical… 
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