YOUTLDR

There Is Something Faster Than Light

Veritasium

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non-locality

Quantum mechanics allows influences that appear faster than light, violating relativity's spirit. Bell's theorem proves any correct theory must be non-local, but the 'many-worlds' interpretation offers a way out by ditching wave function collapse entirely.

  • ⚛️ Einstein's 1935 thought experiment with Bohr highlighted quantum mechanics' non-locality, suggesting it violated relativity.
  • EPR paper showed entangled particles' states are linked instantly, regardless of distance, implying faster-than-light influence.
  • Bell's theorem proved that local hidden variable theories (Einstein's preferred alternative) make different predictions than quantum mechanics.
  • Experiments confirm quantum mechanics' predictions, ruling out local hidden variables and forcing acceptance of non-locality.
  • The 'many-worlds' interpretation avoids non-locality by proposing that all possible outcomes of a measurement occur in parallel universes.

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