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Rosa edited untitled.tex
about 8 years ago
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index 144ad4d..f276cfc 100644
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...
\end{eqnarray}
In the frequency domain the product of these two functions becomes:
\begin{eqnarray}
N^>(\omega)=(e^2/h)\sum_{k\beta,q\gamma} \int \frac{d\epsilon}{2\pi} V_{\beta k} V^*_{\gamma q}G_{\beta
q}>(\epsilon) q}^>(\epsilon) G^{h,<}_{\gamma k}(\omega+\epsilon)
\end{eqnarray}
where
\begin{eqnarray}
...
Then, we have
\begin{eqnarray}
&&N^>(\omega)=(e^2/h)\sum_{k\beta,q\gamma, \nu\mu} \int \frac{d\epsilon}{2\pi} V_{\beta k} V^*_{\gamma q}
[G_{\beta\nu}^r(\epsilon) [G_{\beta\nu}^r(\omega+\epsilon) V_{\nu q} g^{>}_{q}(\omega+\epsilon)+
G_{\beta\nu}^>(\epsilon) G_{\beta\nu}^>(\omega+\epsilon) V_{\nu q} g^{a}_{q}(\omega+\epsilon)]
\\ \nonumber
&&[G_{\gamma\mu}^r(\epsilon) V^*_{\mu k}
g^{<,h}_{k}(\epsilon+\omega)+ g^{<,h}_{k}(\epsilon)+ G_{\gamma\mu}^<(\epsilon) V^*_{\mu k}
g^{a,h}_{k}(\epsilon+\omega)] g^{a,h}_{k}(\epsilon)]
\end{eqnarray}
\begin{eqnarray}
N^>(\omega)&=&(e^2/h)\sum_{k\beta,q\gamma, \nu\mu} \int \frac{d\epsilon}{2\pi}
[G_{\beta\nu}^r(\epsilon) V_{\nu q}
g^{>}_{q}(\omega+\epsilon) g^{>}_{q}(\epsilon) V^*_{\gamma q}
G_{\gamma\mu}^r(\epslion) G_{\gamma\mu}^r(\omega+\epsilon) V^*_{\mu k} g^{<,h}_{k}(\omega+\epsilon) V_{\beta k}]
\\ \nonumber
&&[G_{\beta\nu}^r(epsilon) &&[G_{\beta\nu}^r(\epsilon) V_{\nu q}
g^{>}_{q}(\omega+\epsilon) g^{>}_{q}(∑\epsilon) V^*_{\gamma q}
G_{\gamma\mu}^<(\epsilon) G_{\gamma\mu}^<(\omega+\epsilon) V^*_{\mu k} g^{a,h}_{k}(\omega+\epsilon) V_{\beta k}]
\\ \nonumber
&&[G_{\beta\nu}^>(\epsilon) V_{\nu q}
g^{a}_{q}(\omega+\epsilon) g^{a}_{q}(\epsilon) V^*_{\gamma q}
G_{\gamma\mu}^r(\epsilon) G_{\gamma\mu}^r(\omega+\epsilon) V^*_{\mu k} g^{<,h}_{k}(\omega+\epsilon) V_{\beta k}]
\\ \nonumber
&&[G_{\beta\nu}^>(\epsilon) V_{\nu q}
g^{a}_{q}(\omega+\epsilon) g^{a}_{q}(\epsilon) V^*_{\gamma q}
G_{\gamma\mu}^<(\epsilon) G_{\gamma\mu}^<(\omega+\epsilon) V^*_{\mu k} g^{a,h}_{k}(\epsilon) V_{\beta k}]
\end{eqnarray}
Inserting the expressions for the self-energies we get
\begin{eqnarray}