- #1
Sheepattack
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Homework Statement
I have been given the following problem -
the expectation value of px4 in the ground state of a harmonic oscillator can be expressed as
<px4> = h4/4a4 {integral(-infin to +infin w0*(x) (AAA+A+ + AA+AA+ + A+AAA+) w0 dx}
I think I know how to proceed on other examples, but my given examples only have ladder operators with two terms, i.e. AA+ or A+A.
I can then use the commutation relation, AA+ - A+A =1 to remove them.
what has stuck me here is the four ladder operators in a term. I'm totally unsure on how to proceed!
any advice would be greatly appreciated!