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Green function for bilocal operatos?

  1. Feb 6, 2006 #1
    Dear PF,

    Could you tell me what is Green function for bilocal operators? As I understand from its form G(x1y1, x2y2,.......).... now the pairs of XY are considered as points instead of single X points as in normal Green function
    G(x1,x2,x3.....). So What do we need it for? Or can it be decomposed into sums/products of ordinary Greens functions? Or where to read about it?

    Thks
     
  2. jcsd
  3. Feb 6, 2006 #2
    I've never heard of bilocal operators before, it could just be a difference in terminology. Are you talking about retarded and advanced Greens functions? A greens function can take any number of parameters, normally it's a vector and a time component.
     
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