diff --git a/Manuscript/SRGGW.tex b/Manuscript/SRGGW.tex index 199690d..2c9988e 100644 --- a/Manuscript/SRGGW.tex +++ b/Manuscript/SRGGW.tex @@ -312,7 +312,8 @@ which satisfied the following condition \cite{Kehrein_2006} This implies that the matrix elements of the off-diagonal part decrease in a monotonic way throughout the transformation. Moreover, the coupling coefficients associated with the highest-energy determinants are removed first as we shall evidence in the perturbative analysis below. The main drawback of this generator is that it generates a stiff set of ODE which is therefore difficult to solve numerically. \cite{Hergert_2016a} -However, here we will not tackle the full SRG problem but only consider analytical low-order perturbative expressions so we will not be affected by this problem. \cite{Evangelista_2014,Hergert_2016} +However, here we will not tackle the full SRG problem but only consider analytical low-order perturbative expressions. +Hence, we will not be affected by this problem. \cite{Evangelista_2014,Hergert_2016} Let us now perform the perturbative analysis of the SRG equations. For $s=0$, the initial problem is