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Help about the Nonequilibrium Green's Function

  1. Mar 17, 2006 #1
    help about the Nonequilibrium Green's Function
    in H. Haug and A.-P. Jauho Book
    Quantum kinetics in transport and Optics of Semiconductors
    Eq.(4.31)

    [tex]C^r(t,t')=A^<(t,t')B^r(t,t')+A^r(t,t')B^<(t,t')+A^r(t,t')B^r(t,t')[/tex]

    I can not derive this equation, my result has a extra term [tex]\theta(t-t')[/tex]
    i.e.
    [tex]C^r(t,t')=\theta(t-t')[A^<(t,t')B^r(t,t')+A^r(t,t')B^<(t,t')+A^r(t,t')B^r(t,t')][/tex]
     
  2. jcsd
  3. Mar 21, 2006 #2
    I have understood this problem
     
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