On the left is the (2D real part of) the mathematical model. On the right
is the 3D physical spin vector (sometimes called a "Bloch sphere").
- The moving green vector in the sphere is the physical spin vector
that corresponds to the moving state vector in the mathematical space on
- Note that for any spin state $|\psi\rangle$ the state vector
$-|\psi\rangle$ will correspond to the the same physical spin vector
- Therefore, the the physical vector goes all the way around twice, for
every one time the state vector goes around.
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Just click on the word "Vimeo" on the player.