- #1
brydustin
- 205
- 0
If x,y,z are the position operators.
Is it true that:
<φ|x|φ> + <φ|y|φ> + <φ|z|φ> = <φ | x+y+z| φ> ?
So that if, for example, one wanted to compute <φ|r|φ> (where r =x+y+z), then they would just have to sum the parts.
I know that for scalars, a and b, we have the following:
(a+b)|φ> = a|φ> + b|φ>
But I don't know for sure if this is related at all to the case for operators (especially when they are sandwiched between the bra and the ket.
Is it true that:
<φ|x|φ> + <φ|y|φ> + <φ|z|φ> = <φ | x+y+z| φ> ?
So that if, for example, one wanted to compute <φ|r|φ> (where r =x+y+z), then they would just have to sum the parts.
I know that for scalars, a and b, we have the following:
(a+b)|φ> = a|φ> + b|φ>
But I don't know for sure if this is related at all to the case for operators (especially when they are sandwiched between the bra and the ket.