theorem
proved
term proof
cost_difference_scales_quadratically
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formal statement (Lean)
71theorem cost_difference_scales_quadratically (N : ℕ) (j_single α : ℝ) :
72 jcostEntangled N j_single α - jcostProduct N j_single = α * N * (N - 1) / 2 := by
proof body
Term-mode proof.
73 unfold jcostEntangled jcostProduct
74 ring
75
76/-! ## Pointer States -/
77
78/-- In decoherence theory, "pointer states" are the states that survive
79 interaction with the environment. In RS, these are J-cost minima. -/