Physics
Quantum Mechanics Entanglement and Spooky Action at a distance
Very interesting and experimental approach to entanglement and Bells inequality.
Interesting points of note in the video
- pop bottle bottom glasses on 70's guy!
- Eigenvalues of a quantum mechanical solution are what you can observe. You never observe solutions that are combinations of eigenvalues.
- StarTrek looking test apparatus mock up. Scotty would have felt at home fixing this bugger!
- Einstein did not like ghostly action at a distance. EPR
- Assume quantum theory is incomplete: Look for a hidden variable. Photon pairs are emitted with a shared equal hidden parameter.
- Theories using hidden variables have been created that preserve locality and realism
- Experiments that only test perfect correlations do not force us to choose between quantum explanation and hidden variable method
- John Bell was the first person to show how to bring the two theories into conflict so they could be tested
- Testing perfect correlations are tantamount to looking at one sock and seeing it is blue and concluding the sock on the other foot is blue
- Imperfect correlations: set the target polarizers at unequal angles.
- Alain Aspect and company tested Bell's Theorem
- Tunable lasers were required for this test setup
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