- #1
spaghetti3451
- 1,344
- 33
Consider the eigenvectors ##(0, 1)## and ##(1, 0)## for the quantum system described the magnetic field ##\vec{B} = (0,0,B)##.
Say I now rotate the magnetic field as ##\vec{B} = (B\sin\theta\cos\phi,B\sin\theta\sin\phi,B\cos\theta)##.
Then the eigenvectors are supposed to change as ##(\cos(\theta/2),e^{i\phi}\sin(\theta/2))## and ##(-\sin(\theta/2),e^{i\phi}\cos(\theta/2))##.
How can I prove that under SO(3) rotation, this is how the eigenvectors change?
P.S. : I've written the eigenvectors as row vectors, but they should be column vectors.
Say I now rotate the magnetic field as ##\vec{B} = (B\sin\theta\cos\phi,B\sin\theta\sin\phi,B\cos\theta)##.
Then the eigenvectors are supposed to change as ##(\cos(\theta/2),e^{i\phi}\sin(\theta/2))## and ##(-\sin(\theta/2),e^{i\phi}\cos(\theta/2))##.
How can I prove that under SO(3) rotation, this is how the eigenvectors change?
P.S. : I've written the eigenvectors as row vectors, but they should be column vectors.