- #1
LagrangeEuler
- 717
- 20
How this is defined?
##\vec{r}\cdot \vec{\sigma}##?
where ##\vec{r}=(x,y,z)## and ##\vec{\sigma}=(\sigma_x,\sigma_y,\sigma_z)##. ##\sigma_i## are Pauli spin matrices.
##\vec{r}\cdot \vec{\sigma}##?
where ##\vec{r}=(x,y,z)## and ##\vec{\sigma}=(\sigma_x,\sigma_y,\sigma_z)##. ##\sigma_i## are Pauli spin matrices.