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Rosa edited untitled.tex
about 8 years ago
Commit id: a98a431bac69be3ec65e96371a9c760a10c26ac3
deletions | additions
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index 38af672..01b3b37 100644
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M^>(\omega)=\frac{e^2}{\hbar^2}\sum_{k\beta,q\gamma} V_{\beta k}^{*}V_{\gamma q}\int \frac{d\epsilon}{2\pi} [G^{h,>}_{kq}(\epsilon) G^{<}_{\gamma\beta}(\omega+\epsilon)
\end{eqnarray}
We replace now
\begin{eqnarray}
&&G_{kq}^{h,>}(\omega+\epsilon) \begin{align*}
&G_{kq}^{h,>}(\epsilon) = \sum_{\alpha\delta}
[g_{k}^{h,r}(\omega+\epsilon) [g_{k}^{h,r}(\epsilon) V_{\alpha k}
G^{r}_{\alpha\delta}(\omega+\epsilon)V_{\delta G^{r}_{\alpha\delta}(\epsilon)V_{\delta q}^*
g_{q}^{h,>}(\omega) +g_{k}^{h,r}(\omega+\epsilon) g_{q}^{h,>}(\epsilon) +g_{k}^{h,r}(\epsilon) V_{\alpha k}
G^{>}_{\alpha\delta}(\omega+\epsilon)V_{\delta G^{>}_{\alpha\delta}(\epsilon)V_{\delta q}^*
g_{q}^{h,a}(\omega+\epsilon)] g_{q}^{h,a}(\epsilon)]
\\
\nonumber
&&g_{k}^{h,>}(\omega+\epsilon) &+g_{k}^{h,>}(\epsilon) V_{\gamma k}
G^{a}_{\gamma\beta}(\omega+\epsilon)V_{\beta G^{a}_{\gamma\beta}(\epsilon)V_{\beta q}^*
g_{q}^{h,a}(\omega) g_{q}^{h,a}(\epsilon) ]\,,
\end{eqnarray} \end{align*}
Then we get
\begin{eqnarray}
&&M^>(\omega)=\frac{2 i e^2}{\hbar^2}\sum_{k\beta,q\gamma,\alpha\delta,\nu\mu} \int \frac{d\epsilon}{2\pi}\Biggr\{
V_{\beta k}^{*}
g_{k}^{h,r}(\omega+\epsilon) g_{k}^{h,r}(\epsilon) V_{\alpha k}
G^{r}_{\alpha\delta}(\omega+\epsilon) G^{r}_{\alpha\delta}(\epsilon) V_{\delta q}^*
g_{q}^{h,>}(\omega+\epsilon) g_{q}^{h,>}(\epsilon) V_{\gamma q}
G^{r}_{\gamma\nu}(\epsilon) G^{r}_{\gamma\nu}(\omega+\epsilon) \Gamma_{\nu\mu}
G^{a}_{\gamma\nu}(\epsilon)(f_e(\epsilon)+f_h(\epsilon))+ G^{a}_{\gamma\nu}(\omega+\epsilon)(f_e(\omega+\epsilon)+f_h(\omega+\epsilon))+ \\ \nonumber
&&
V_{\beta k}^{*}
g_{k}^{h,r}(\omega+\epsilon) g_{k}^{h,r}(\epsilon) V_{\alpha k}
G^{>}_{\alpha\delta}(\omega+\epsilon) G^{>}_{\alpha\delta}(\epsilon) V_{\delta q}^*
g_{q}^{h,<}(\omega+\epsilon) g_{q}^{h,<}(\epsilon) V_{\gamma q}
G^{r}_{\gamma\nu}(\epsilon) G^{r}_{\gamma\nu}(\omega+\epsilon) \Gamma_{\nu\mu}
G^{a}_{\gamma\nu}(\epsilon)(f_e(\epsilon)+f_h(\epsilon))\\ G^{a}_{\gamma\nu}(\omega+\epsilon)(f_e(\omega+\epsilon)+f_h(\omega+\epsilon))\\ \nonumber
&&
V_{\beta k}^{*}
g_{k}^{h,>}(\omega+\epsilon) g_{k}^{h,>}(\epsilon) V_{\alpha k}
G^{a}_{\alpha\delta}(\omega+\epsilon) G^{a}_{\alpha\delta}(\epsilon) V_{\delta q}^*
g_{q}^{h,a}(\omega+\epsilon) g_{q}^{h,a}(\epsilon) V_{\gamma q} G^{r}_{\gamma\nu}(\epsilon) \Gamma_{\nu\mu}
G^{a}_{\gamma\nu}(\epsilon) (f_e(\epsilon)+f_h(\epsilon))\Biggr\} G^{a}_{\gamma\nu}(\omega+\epsilon) (f_e(\omega+\epsilon)+f_h(\epsilon))\Biggr\}
\end{eqnarray}
We now use the explicit expressions for the self-energies
\begin{eqnarray}
&&M^>(\omega)=\frac{2i e^2}{\hbar^2}\sum_{k\beta,q\gamma,\alpha\delta\nu\mu} \int \frac{d\epsilon}{2\pi}\Biggr\{
[\Sigma^{r,h}_{0,\beta\alpha}(\omega+\epsilon) G^{r}_{\alpha\delta}(\omega+\epsilon) [\Sigma^{r,h}_{0,\beta\alpha}(\epsilon) G^{r}_{\alpha\delta}(\epsilon) \Sigma^{h,>}_{0,\delta\gamma}
G^{r}_{\gamma\nu}(\epsilon)\Gamma_{\nu\mu}](f_{e}(\epsilon)+f_h(\epsilon)) G^{r}_{\gamma\nu}(\omega+\epsilon)\Gamma_{\nu\mu}](f_{e}(\omega+\epsilon)+f_h(\omega+\epsilon)) +
\\
\nonumber
&&[\Sigma^{r,h}_{0,\beta\alpha}(\omega+\epsilon) G^{>}_{\alpha\delta}(\omega+\epsilon) \Sigma^{h,a}_{0,\delta\gamma} G^{r}_{\gamma\nu}(\epsilon)\Gamma_{\nu\mu}](f_{e}(\epsilon)+f_h(\epsilon))+