Avoiding coherent errors with rotated concatenated stabilizer codes

  title={Avoiding coherent errors with rotated concatenated stabilizer codes},
  author={Yingkai Ouyang},
  journal={npj Quantum Information},
  • Yingkai Ouyang
  • Published 1 October 2020
  • Computer Science, Physics
  • npj Quantum Information
Coherent errors, which arise from collective couplings, are a dominant form of noise in many realistic quantum systems, and are more damaging than oft considered stochastic errors. Here, we propose integrating stabilizer codes with constant-excitation codes by code concatenation. Namely, by concatenating an [[ n ,  k ,  d ]] stabilizer outer code with dual-rail inner codes, we obtain a [[2 n ,  k ,  d ]] constant-excitation code immune from coherent phase errors and also equivalent to a Pauli… 
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