- #1
teroenza
- 195
- 5
Homework Statement
Simplify the following commutator involving the creation and annihilation operators.
[tex][a^{\dagger}a,a \sqrt{a^\dagger a} ][/tex]
Homework Equations
I know that [tex] [a,a^\dagger] = 1[/tex].
The Attempt at a Solution
I think I should be trying to put the creation operators to the left (normal ordering). I have also worked out
[tex][a^{\dagger}a,a]=a[/tex], but can't seem to figure out what to do in this case.