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Rosa edited untitled.tex
about 8 years ago
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\end{eqnarray}
Then
\begin{align*}
\frac{ &Q^>(\omega)\frac{ e^2}{\hbar^2}\sum_{k\beta,q\gamma,\alpha} \int \frac{d\epsilon}{2\pi}\\
&[g^{r,h}_{k}(\epsilon) &V_{\beta k}^* V_{\gamma q}[g^{r,h}_{k}(\epsilon) V_{\alpha k} G_{\alpha\gamma}^>(\epsilon)+g^{>,h}_{k}(\epsilon) V_{\alpha k} G_{\alpha\gamma}^a(\epsilon)] [ V_{\gamma q} g^{r}_{q}(\omega+\epsilon) V^*_{\alpha q} G_{\alpha\beta}^<(\omega+\epsilon)+ V_{\gamma q} g^{<}_{q}(\epsilon) V^*_{\alpha q} G_{\alpha\beta}^a(\omega+\epsilon) ]
\end{align*}
Then we have
\begin{align*}
&Q^>(\omega) = \frac{ e^2}{\hbar^2}\sum_{k\beta,q\gamma,\alpha} \int \frac{d\epsilon}{2\pi}[\Sigma_{0,\beta\alpha}^r
(\omega+\epsilon)G_{\alpha\gamma}^>(\omega+\epsilon)+ (\epsilon)G_{\alpha\gamma}^>(\epsilon)+ \Sigma_{0,\beta\alpha}^>
(\omega+\epsilon) G_{\alpha\gamma}^a(\omega+\epsilon)] (\epsilon) G_{\alpha\gamma}^a(\epsilon)]
\\
&[\Sigma^r_{0,\gamma
\alpha}(\epsilon) G_{\alpha\beta}^<(\epsilon)+ \alpha}(\omega+\epsilon) G_{\alpha\beta}^<(\omega+\epsilon)+ \Sigma^<_{0,\gamma
\alpha}(\epsilon)G_{\alpha\beta}^a(\omega)] \alpha}(\omega+\epsilon)G_{\alpha\beta}^a(\omega+\epsilon)]
\end{align*}
We can split $Q^>(\omega)$ in four contributions
\begin{eqnarray}
Q^{>,1}(\omega) = \frac{ 4e^2}{\hbar^2}\sum_{k\beta,q\gamma,\alpha\mu\nu\tau,\delta\lambda} \int
\frac{d\epsilon}{2\pi}[-i\Gamma_{\beta\alpha}]G_{\alpha\delta}^r(\omega+\epsilon)\Gamma_{\delta\lambda} G_{\lambda\gamma}^a(\omega+\epsilon) [-i\Gamma_{\gamma\tau}]G_{\tau\mu}^r(\epsilon)\Gamma_{\mu\nu} G_{\nu\beta}^a(\epsilon)((1-f_h(\omega+\epsilon)+(1-f_e(\omega+\epsilon)))(f_e(\epsilon)+f_h(\epsilon)) \frac{d\epsilon}{2\pi}[-i\Gamma_{\beta\alpha}]G_{\alpha\delta}^r(\epsilon)\Gamma_{\delta\lambda} G_{\lambda\gamma}^a(\epsilon) [-i\Gamma_{\gamma\tau}]G_{\tau\mu}^r(\omega+\epsilon)\Gamma_{\mu\nu} G_{\nu\beta}^a(\omega+\epsilon)((1-f_h(\epsilon)+(1-f_e(\epsilon)))(f_e(\omega+\epsilon)+f_h(\omega+\epsilon))
\end{eqnarray}
\begin{eqnarray}
Q^{>,2}(\omega) = \frac{ 4e^2}{\hbar^2}\sum_{k\beta,q\gamma,\alpha\mu\nu\tau} \int
\frac{d\epsilon}{2\pi}[-i\Gamma_{\beta\alpha}]G_{\alpha\gamma}^a(\omega+\epsilon) [-i\Gamma_{\gamma\tau}]G_{\tau\mu}^r(\epsilon)\Gamma_{\mu\nu} G_{\nu\beta}^a(\epsilon) (1-f_h(\omega+\epsilon))(f_e(\epsilon)+f_h(\epsilon)) \frac{d\epsilon}{2\pi}[-i\Gamma_{\beta\alpha}]G_{\alpha\gamma}^a(\epsilon) [-i\Gamma_{\gamma\tau}]G_{\tau\mu}^r(\omega+\epsilon)\Gamma_{\mu\nu} G_{\nu\beta}^a(\omega+\epsilon) (1-f_h(\epsilon))(f_e(\omega+\epsilon)+f_h(\omega+\epsilon))
\end{eqnarray}
\begin{eqnarray}
Q^{>,3}(\omega) = \frac{ 4e^2}{\hbar^2}\sum_{k\beta,q\gamma,\alpha\mu\nu\tau} \int \frac{d\epsilon}{2\pi}
[-i\Gamma_{\beta\alpha}]G_{\alpha\delta}^r(\omega+\epsilon)\Gamma_{\delta\lambda} G_{\lambda\gamma}^a(\omega+\epsilon) \Gamma_{\gamma\tau}G^a_{\tau\beta}(\epsilon)((1-f_h(\omega+\epsilon)+(1-f_e(\omega+\epsilon)))f_e(\epsilon) [-i\Gamma_{\beta\alpha}]G_{\alpha\delta}^r(\epsilon)\Gamma_{\delta\lambda} G_{\lambda\gamma}^a(\epsilon) \Gamma_{\gamma\tau}G^a_{\tau\beta}(\omega+\epsilon)((1-f_h(\epsilon)+(1-f_e(\epsilon)))f_e(\omega+\epsilon)
\end{eqnarray}
\begin{eqnarray}
Q^{>,4}(\omega) = \frac{ 4e^2}{\hbar^2}\sum_{k\beta,q\gamma,\alpha\mu\nu\tau } \int
\frac{d\epsilon}{2\pi}[\Gamma_{\beta\alpha}]G_{\alpha\gamma}^a(\omega+\epsilon) [-i\Gamma_{\gamma\tau}]G_{\tau\mu}^r(\epsilon)\Gamma_{\mu\nu} G_{\nu\beta}^a(\epsilon)(f_h(\omega+\epsilon)+f_e(\omega+\epsilon))(1-f_h(\epsilon)) \frac{d\epsilon}{2\pi}[\Gamma_{\beta\alpha}]G_{\alpha\gamma}^a(\epsilon) [-i\Gamma_{\gamma\tau}]G_{\tau\mu}^r(\omega+\epsilon)\Gamma_{\mu\nu} G_{\nu\beta}^a(\omega+\epsilon)(f_h(\omega+\epsilon)+f_e(\omega+\epsilon))(1-f_h(\epsilon))
\end{eqnarray}