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2018-07-11: Quantum Invariance & The Origin of The Standard Model

  • 04:47: We call this sort of transformation a global phase shift.
  • 04:56: The equations of quantum mechanics have what we call global phase invariance.
  • 05:02: Global phase is a gauge symmetry of the system.
  • 05:16: This position dependent phase shift is called a local phase shift, instead of a global phase shift.
  • 05:32: A global phase shift looks like this, where all points move by the same amount.
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