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def definition def or abbrev

predictedQubitDecoherence

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formal statement (Lean)

 196noncomputable def predictedQubitDecoherence : ℝ :=

proof body

Definition body.

 197  decoherenceTime ⟨typicalSCQubit.env_modes, 0.5, by norm_num, by norm_num⟩
 198
 199/-! ## The Gap-45 Threshold in Practice -/
 200
 201/-- Number of modes to cross from quantum to classical (Gap-45 crossover).
 202    For τ_target = 1 s (human scale), coupling = 1:
 203    N ≈ 45 × ln(10) / ln(φ) ≈ 45 × 2.3 / 0.48 ≈ 215 -/

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