
20180711: 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.
