Approximate quantum error correction can lead to better codes

  • Leung D
  • Nielsen M
  • Chuang I
 et al. 
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Abstract

We present relaxed criteria for quantum error correction which are useful when the specific dominant noise process is known. These criteria have no classical analogue. As an example, we provide a four-bit code which corrects for a single amplitude damping error. This code violates the usual Hamming bound calculated for a Pauli description of the error process, and does not fit into the GF(4) classification.

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Authors

  • Debbie W. Leung

  • M. A. Nielsen

  • Isaac L. Chuang

  • Yoshihisa Yamamoto

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