minor corrections
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@ -562,9 +562,12 @@ while the dynamic part of the self-energy [see Eq.~\eqref{eq:srg_sigma}] tends t
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\begin{equation}
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\lim_{s\to\infty} \widetilde{\bSig}(\omega; s) = \bO.
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\end{equation}
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Therefore, the SRG flow continuously transforms the dynamical self-energy $\widetilde{\bSig}^{\GW}(\omega; s)$ into a static correction $\widetilde{\bF}^{(2)}(s)$.
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Therefore, the SRG flow continuously transforms the dynamical self-energy $\widetilde{\bSig}(\omega; s)$ into a static correction $\widetilde{\bF}^{(2)}(s)$.
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As illustrated in Fig.~\ref{fig:flow}, this transformation is done gradually starting from the states that have the largest denominators in Eq.~\eqref{eq:static_F2}.
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\titou{For a fixed value of the energy cutoff $\Lambda = s^{-1/2}$, it is important to notice that if $\abs*{\Delta_{pr}^{\nu}} \gg \Lambda$, then $W_{p,r\nu}(s) = W_{p,r\nu} e^{-(\Delta_{pr\nu})^2 s} \approx 0$ (\ie decoupled), while for $\abs*{\Delta_{pr}^{\nu}} \ll \Lambda$, we have $W_{p,r\nu}(s) \approx W_{p,r\nu}$ (\ie remains coupled).}
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\PFL{To reformulate and maybe move around.}
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%%% FIG 2 %%%
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\begin{figure*}
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\includegraphics[width=0.8\linewidth]{fig1.pdf}
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@ -602,10 +605,11 @@ The fact that the $s\to\infty$ static limit does not always converge when used i
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Therefore, one should use a value of $s$ large enough to include almost every state but small enough to avoid intruder states.
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It is instructive to plot the functional form of both regularizing functions, this is done in Fig.~\ref{fig:plot}.
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The surfaces are plotted for a regularizing parameter value of $\eta=1$, where we have set $s=1/2\eta^2$ such that the first order Taylor expansion around $(0,0)$ of both functional form are equal.
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The surfaces are plotted for a regularizing parameter value of $\eta=1$, where we have set $s=1/2\eta^2$ such that the first order Taylor expansion around $(0,0)$ of both functional forms is equal.
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One can observe that the SRG surface is much smoother than its qs counterpart.
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This is due to the fact that the SRG functional has less irregularities for $\eta=0$, in fact there is a single singularity at $x=y=0$.
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On the other hand the function $f_{\text{qs}}(x,y;0)$ is singular on two entire axis, $x=0$ and $y=0$.
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This is due to the fact that the SRG functional at $\eta=0$, $f^{\SRGqsGW}(x,y;0)$, has fewer irregularities.
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In fact, there is a single singularity at $x=y=0$.
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On the other hand, the function $f^{\qsGW}(x,y;0)$ is singular on the two entire axes, $x=0$ and $y=0$.
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The smoothness of the SRG surface might induce a smoother convergence of SRG-qs$GW$ compared to qs$GW$.
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The convergence properties and the accuracy of both static approximations will be quantitatively gauged in Sec.~\ref{sec:results}.
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