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Bell inequality and quantum entanglement

What you are seeing: a source emits two photons in a polarization singlet. Alice (left) measures at angle aa, Bob (right) at bb. The singlet correlation is E(a,b)=−cos⁡(2(a−b))E(a, b) = -\cos(2(a-b)); the CHSH statistic SS is bounded by 2 classically but reaches 222\sqrt{2} in quantum mechanics

Figure 1. Bell-CHSH test with polarization-entangled photons. Method: closed-form singlet correlation + Monte Carlo finite-sample E.
a (deg)0
a (deg)45
b (deg)22
b (deg)67
presetopt

WHAT TO TRY

  • Vary each control and watch the rail readouts respond.
  • Compare the diagnostic plot against the live scene.