Recent content by VintageGuy

  1. VintageGuy

    Advanced Dirac field propagator (spacelike separation)

    Homework Statement [/B] I'm supposed to calculate the advanced propagator for the Dirac field, and I have no problem with that. Then I'm supposed to show it vanishes for spacelike separation (that is (x-y)^2<0). Homework Equations For the advanced propagator I get something like: S_A =...
  2. VintageGuy

    Tensor indices (proving Lorentz covariance)

    I just figured it out, for some reason I was approaching the equation as though it was the Lagrangian density... Thanks, solved.
  3. VintageGuy

    What's New for Fourth-Year Scientists?

    Thank you. :)
  4. VintageGuy

    Tensor indices (proving Lorentz covariance)

    Homework Statement [/B] So, I need to show Lorentz covariance of a Proca field E-L equation, conceptually I have no problems with this, I just have to make one final step that I cannot really justify. Homework Equations "Proca" (quotation marks because of the minus next to the mass part, I...
  5. VintageGuy

    What's New for Fourth-Year Scientists?

    Hi guys, just trying to be a conformist here and introduce myself properly. Finishing my fourth year of study and soon to start my master's degree thesis, I hope. Nothing special, just wanted to see what's up, hopefully help someone with stuff or get some help otherwise.
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