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structure definition def or abbrev

ErrorModel

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formal statement (Lean)

  52structure ErrorModel where
  53  p_I : ℝ  -- Probability of no error
  54  p_X : ℝ  -- Probability of bit flip
  55  p_Y : ℝ  -- Probability of Y error
  56  p_Z : ℝ  -- Probability of phase flip
  57  nonneg_I : p_I ≥ 0
  58  nonneg_X : p_X ≥ 0
  59  nonneg_Y : p_Y ≥ 0
  60  nonneg_Z : p_Z ≥ 0
  61  normalized : p_I + p_X + p_Y + p_Z = 1
  62
  63/-- The depolarizing channel with error probability p.
  64    All errors equally likely. -/

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