 Classical-quantum state

ID: classical-quantum-state

Codex  0 Created 2026-09-28 Updated 2026-11-05

ρ_{XB} = \sum_{x} p_{x} ∣ x ⟩ ⟨ x ∣ \otimes ρ_{x}

. Its entropy is

H (p) + \sum_{x} p_{x} S (ρ_{x})

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