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Ladder approximation

  1. Jun 16, 2009 #1
    Hi there!

    In some papers related to statistical field theory and condensed matter I've encountered the ladder approximation. It apparently corresponds to the summation of a certain class of Feynman diagrams. I've tried Google and some field theory books to learn more about this but I've found nothing, at least nothing pedagogigal.

    Does anyone know a book which explains the ladder approximation? I want to know how it exactly works, in which cases it can be used and what the approximation actually neglects.

  2. jcsd
  3. Jun 16, 2009 #2


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    The book of Gross (relativistic quantum mechanics and field theory) covers it I think
  4. Jun 17, 2009 #3
    I think you should take a look at R. Mattuck, "A Guide to Feynman Diagrams in the Many-Body Problem", chap. 10 (Dyson's equation, Renormalization, RPA and Ladder Approximations). You can find the book in Google Books.
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