Bell's theorem

Bell's theorem disproves local hidden-variable theories

Bell's theorem revealed that quantum mechanics cannot be reconciled with local hidden-variable theories. This theorem showed that if such theories were true, they would not align with the predictions of quantum mechanics.

Example

Bell's theorem demonstrated that entangled particles exhibit correlations that cannot be explained by local hidden variables.

Remember this

Understanding Bell's theorem is crucial for grasping the fundamental differences between quantum mechanics and classical physics.

Text adapted from Wikipedia, licensed under CC BY-SA 4.0.

Related concepts

Physical paradox

Einstein argued entanglement implied either hidden variables or nonlocality

Eastin–Knill theorem

No quantum error correcting code can have a continuous symmetry acting transversely on physical qubits

Aspect ratio (image)

Bell inequality violations confirm quantum nonlocality

Measurement in quantum mechanics

Quantum states describe probabilities, not certainties

Noether's theorem

Noether's theorem links continuous symmetries to conservation laws

Copenhagen interpretation

Wavefunction collapse is fundamental

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