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Rosa edited untitled.tex
about 8 years ago
Commit id: 3fa4a4e085ee9cfb07753e7627a3623b4003ffbe
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...
The rest of equations for the Green functions that appear in the noise expression are already in J. S note.
Now we employ the following definition for the Fourier transform
\begin{equation}
F(t-t')=\frac{1}{2\pi}\int_{-\infty}^\infty} F(t-t')=\frac{1}{2\pi}\int_{-\infty}^\infty d\omega e^{-i\omega t} F(\omega)\,,
\end{equation}
Then, the ac spectral noise becomes
\begin{multline}
...
d\omega e^{-i\omega (t-t')} \frac{1}{2\pi}\int_{-\infty}^\infty d\epsilon_1 e^{-i\epsilon (t-t')} \frac{1}{2\pi}\int_{-\infty}^\infty d\epsilon_2 e^{i\epsilon (t-t')}
\\
\Biggr\{
[V_{\beta V_{\beta k} V_{\gamma q}^{*}
G^t_{\beta\gamma}(\epsilon_1) [G^t_{\beta\gamma}(\epsilon_1) G^{h,t}_{qk}(\epsilon_2) - G^{t}_{\beta q}(\epsilon_1)G^{h,t}_{\gamma k}(\epsilon_2)]
+ V_{\beta k}^{*}V_{\gamma q} [G^{h,t}_{kq}(\epsilon_1) G{t}_{\gamma\beta}(\epsilon_2) - G^{h,t}_{k\gamma}(\epsilon_1)G^{t}_{q \beta}(\epsilon_2)]\Biggr\}\,,
\end{multline}