- #1
binbagsss
- 1,254
- 11
Homework Statement
Homework Equations
The Attempt at a Solution
[/B]
I think I understand part b) . The idea is to move the operator that annihilates to the RHS via the commutator relation.
However I can't seem to get part a.
I have:
## [ P^u, P^v]= \int \int \frac{1}{(2\pi)^6} d^3k d^3 k' (a^{\dagger}(k)a(k)a^{\dagger}(k')a(k') k^u k'^v - a^{\dagger}(k')a(k')a^{\dagger}(k)a(k) k'^vk^u)##
And I can't even think of a first move here, and I don't see anyway to include the commutator expression?
Many thanks in advance