- #1
benbenny
- 42
- 0
It is my understanding that a measurement of [tex] S_z [/tex] followed by a measurement of [tex] S_y [/tex] will result in a particle which is in an eigenstate of [tex] S_y [/tex]. But it appears that a measurement of say [tex] S_y [/tex] followed by a measurement of [tex] S_x [/tex] results in zero. I see this from a question in which I am asked to find the expectation value of [tex] S_x [/tex] for a particle in an eigenstate of [tex] S_y [/tex] and my result is zero. But for [tex] S_z [/tex] it is non zero.
I don't understand why this is so. Could someone help me understand why we find non zero [tex] S_z [/tex] values but zero [tex] S_x [/tex] values for a partilce in an [tex] S_y [/tex] eigenstate.
Thanks in advance.
B
I don't understand why this is so. Could someone help me understand why we find non zero [tex] S_z [/tex] values but zero [tex] S_x [/tex] values for a partilce in an [tex] S_y [/tex] eigenstate.
Thanks in advance.
B