quantum mechanics - Up and down spin are orthogonal, not antiparallel - Physics Stack Exchange
In conventional coordinate systems (anything you solve a simple Newtonian mechanics problem with), up and down are + and - z. A vector pointing up and a vector pointing down are anti-parallel. But ...
quantum mechanics - Up and down spin are orthogonal, not antiparallel - Physics Stack Exchange Stack Internal Knowledge at work Bring the best of human thought and AI automation together at your work. Explore Stack Internal Up and down spin are orthogonal, not antiparallel Ask Question Asked 4 years, 11 months ago Modified 4 years, 11 months ago Viewed 3k times 15 $\begingroup$ In conventional coordinate systems (anything you solve a simple Newtonian mechanics problem with), up and down are + and - z. A vector pointing up and a vector pointing down are anti-parallel. But in qm, we have up and
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