- #1
askalot
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Homework Statement
I am trying to calculate the following quantity:
$$<0|T\{\phi^\dagger(x_1) \phi(x_2) exp[i\int{L_1(x)dx}]\}|0>$$
where:
$$ L_1(x) = -ieA_{\mu}[\phi^*
(\partial_\mu \phi ) - (\partial_\mu \phi^*)\phi] $$[/B]
I am trying to find an expression including the propagators, wick's theorem, and then calculate the Feynman diagrams in position space.
The solution should include terms of up to ## e^2 ## order.
Homework Equations
The Attempt at a Solution
I am not sure if the Lagrangian ## L_1(x) ## is the interaction Lagrangian, so that I should use it as it is in the integral, or if I should extract an interaction Lagrangian out of it.
I also have to tell you that I am not expected to calculate complex integrals in every detail, or be occupied with infinities.
[/B]