CHSH: LHV bound 2, Tsirelson 2√2, gap (2√2)²−2² = 4

Layer 1 — Physicsin the quantum-information-physics subtree

Sympy-exact symbolic witness of the CHSH classical-vs-quantum bound gap. Step 1 — classical: on dichotomic ±1 observables the quantity C = A B + A B' + A' B − A' B' takes value in [−2, 2] for every hidden-variable outcome assignment (one…

Related concepts

CHSH operator C = AB + AB' + A'B − A'B': LHV ≤ 2, QM ≤ 2√2
Bell states {|Φ±⟩, |Ψ±⟩}: maximally-entangled 2-qubit basis
Bell inequality

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