Unified all figures
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@ -235,6 +235,7 @@ the two following terms account for the electron-nucleus attraction and the elec
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% EXACT SCHRODINGER EQUATION
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The exact many-electron wave function at a given nuclear geometry $\Psi(\vb{R})$ corresponds
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of using adjacent partial sums
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to the solution of the (time-independent) Schr\"{o}dinger equation
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\begin{equation}
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\hH(\vb{R})\, \Psi(\vb{R}) = E(\vb{R})\, \Psi(\vb{R}),
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@ -507,7 +508,7 @@ the total spin operator $\hat{\mathcal{S}}^2$, leading to ``spin-contamination''
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% HF energies as a function of U/t
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%%%%%%%%%%%%%%%%%
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\begin{figure}
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\includegraphics[width=\linewidth]{HF_real.pdf}
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\includegraphics[width=\linewidth]{fig2}
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\caption{\label{fig:HF_real}
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RHF and UHF energies \titou{in the Hubbard dimer} as a function of the correlation strength $U/t$.
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The symmetry-broken UHF solution emerges at the coalescence point $U=2t$ (black dot), often known as the Coulson-Fischer point.}
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@ -551,15 +552,15 @@ modelling the correct physics with the two electrons on opposite sites.
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%%%%%%%%%%%%%%%%%
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\begin{figure*}[t]
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\begin{subfigure}{0.49\textwidth}
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\includegraphics[height=0.65\textwidth,trim={0pt 0pt 0pt -35pt},clip]{HF_cplx_angle}
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\includegraphics[height=0.65\textwidth,trim={0pt 0pt 0pt -35pt},clip]{fig3a}
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\subcaption{\label{subfig:UHF_cplx_angle}}
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\end{subfigure}
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\begin{subfigure}{0.49\textwidth}
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\includegraphics[height=0.65\textwidth]{HF_cplx_energy}
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\includegraphics[height=0.65\textwidth]{fig3b}
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\subcaption{\label{subfig:UHF_cplx_energy}}
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\end{subfigure}
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\caption{%
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(\subref{subfig:UHF_cplx_angle}) Real component of the UHF angle $\ta^{\text{UHF}}$ for $\lambda \in \bbC$ \titou{in the Hubbard dimer for $U/t = ??$}.
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(\subref{subfig:UHF_cplx_angle}) Real component of the UHF angle $\ta^{\text{UHF}}$ for $\lambda \in \bbC$ in the Hubbard dimer for $U/t = 2$.
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Symmetry-broken solutions correspond to individual sheets and become equivalent at
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the \textit{quasi}-EP $\lambda_{\text{c}}$ (black dot).
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The RHF solution is independent of $\lambda$, giving the constant plane at $\pi/2$.
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@ -794,17 +795,17 @@ gradient discontinuities or spurious minima.
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%%% FIG 2 %%%
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\begin{figure*}
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.75\textwidth]{fig2a}
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\includegraphics[height=0.75\textwidth]{fig4a}
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\subcaption{\label{subfig:RMP_3.5} $U/t = 3.5$}
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\end{subfigure}
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%
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.75\textwidth]{fig2b}
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\includegraphics[height=0.75\textwidth]{fig4b}
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\subcaption{\label{subfig:RMP_cvg}}
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\end{subfigure}
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%
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.75\textwidth]{fig2c}
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\includegraphics[height=0.75\textwidth]{fig4c}
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\subcaption{\label{subfig:RMP_4.5} $U/t = 4.5$}
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\end{subfigure}
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\caption{
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@ -849,7 +850,7 @@ The Taylor expansion of the RMP energy can then be evaluated to obtain the $k$th
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% RADIUS OF CONVERGENCE PLOTS
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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\begin{figure}[htb]
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\includegraphics[width=\linewidth]{RadConv}
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\includegraphics[width=\linewidth]{fig5}
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\caption{
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Radius of convergence $r_c$ for the RMP ground state (red), the UMP ground state (blue), and the UMP excited state (orange)
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series as functions of the ratio $U/t$.
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@ -871,17 +872,17 @@ for the two states using the ground-state RHF orbitals is identical.
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%%% FIG 3 %%%
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\begin{figure*}
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.75\textwidth]{fig3a}
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\includegraphics[height=0.75\textwidth]{fig6a}
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\subcaption{\label{subfig:UMP_3} $U/t = 3$}
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\end{subfigure}
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%
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.75\textwidth]{fig3b}
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\includegraphics[height=0.75\textwidth]{fig6b}
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\subcaption{\label{subfig:UMP_cvg}}
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\end{subfigure}
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%
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.75\textwidth]{fig3c}
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\includegraphics[height=0.75\textwidth]{fig6c}
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\subcaption{\label{subfig:UMP_7} $U/t = 7$}
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\end{subfigure} \caption{
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Convergence of the UMP series as a function of the perturbation order $n$ for the Hubbard dimer at $U/t = 3$ and $7$.
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@ -1153,17 +1154,17 @@ states which share the symmetry of the ground state,\cite{Goodson_2004} and are
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%------------------------------------------------------------------%
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\begin{figure*}[t]
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.75\textwidth]{rmp_cp}
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\includegraphics[height=0.75\textwidth]{fig7a}
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\subcaption{\label{subfig:rmp_cp}}
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\end{subfigure}
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%
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.75\textwidth]{rmp_cp_surf}
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\includegraphics[height=0.75\textwidth]{fig7b}
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\subcaption{\label{subfig:rmp_cp_surf}}
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\end{subfigure}
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%
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.75\textwidth]{rmp_ep_to_cp}
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\includegraphics[height=0.75\textwidth]{fig7c}
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\subcaption{\label{subfig:rmp_ep_to_cp}}
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\end{subfigure}
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\caption{%
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@ -1253,17 +1254,17 @@ set representations of the MP critical point.\cite{Sergeev_2006}
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%------------------------------------------------------------------%
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\begin{figure*}[t]
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.75\textwidth,trim={0pt 5pt -10pt 15pt},clip]{ump_cp}
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\includegraphics[height=0.75\textwidth,trim={0pt 5pt -10pt 15pt},clip]{fig8a}
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\subcaption{\label{subfig:ump_cp}}
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\end{subfigure}
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%
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.75\textwidth]{ump_cp_surf}
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\includegraphics[height=0.75\textwidth]{fig8b}
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\subcaption{\label{subfig:ump_cp_surf}}
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\end{subfigure}
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%
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.75\textwidth]{ump_ep_to_cp}
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\includegraphics[height=0.75\textwidth]{fig8c}
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\subcaption{\label{subfig:ump_ep_to_cp}}
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\end{subfigure}
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% \includegraphics[height=0.65\textwidth,trim={0pt 5pt 0pt 15pt}, clip]{ump_critical_point}
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@ -1329,8 +1330,8 @@ radius of convergence (see Fig.~\ref{fig:RadConv}).
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%%%%%%%%%%%%%%%%%
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\begin{figure*}
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\includegraphics[height=0.23\textheight]{PadeRMP35}
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\includegraphics[height=0.23\textheight]{PadeRMP45}
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\includegraphics[height=0.23\textheight]{fig9a}
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\includegraphics[height=0.23\textheight]{fig9b}
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\caption{\label{fig:PadeRMP}
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RMP ground-state energy as a function of $\lambda$ obtained using various resummation
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techniques at $U/t = 3.5$ (left) and $U/t = 4.5$ (right).}
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@ -1429,7 +1430,7 @@ a convergent series.
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%%%%%%%%%%%%%%%%%
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\begin{figure}[t]
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\includegraphics[width=\linewidth]{QuadUMP}
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\includegraphics[width=\linewidth]{fig10}
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\caption{\label{fig:QuadUMP}
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UMP energies as a function of $\lambda$ obtained using various resummation techniques at $U/t = 3$.}
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\end{figure}
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@ -1541,18 +1542,18 @@ The remedy for this problem involves applying a suitable transformation of the c
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\begin{figure*}
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.85\textwidth]{ump_qa322}
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\subcaption{\label{subfig:ump_ep_to_cp} [3/2,2] Quadratic}
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\includegraphics[height=0.85\textwidth]{fig11a}
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\subcaption{\label{subfig:322quad} [3/2,2] Quadratic}
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\end{subfigure}
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%
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.85\textwidth]{ump_exact}
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\subcaption{\label{subfig:ump_cp_surf} Exact}
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\includegraphics[height=0.85\textwidth]{fig11b}
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\subcaption{\label{subfig:exact} Exact}
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\end{subfigure}
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%
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\begin{subfigure}{0.32\textwidth}
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\includegraphics[height=0.85\textwidth]{ump_qa304}
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\subcaption{\label{subfig:ump_cp} [3/0,4] Quadratic}
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\includegraphics[height=0.85\textwidth]{fig11c}
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\subcaption{\label{subfig:304quad} [3/0,4] Quadratic}
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\end{subfigure}
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\caption{%
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Comparison of the [3/2,2] and [3/0,4] quadratic approximants with the exact UMP energy surface in the complex $\lambda$
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@ -1716,7 +1717,7 @@ However, like the UMP series in stretched \ce{H2},\cite{Lepetit_1988}
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the cost of larger denominators is an overall slower rate of convergence.
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\begin{figure}
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\includegraphics[width=\linewidth]{rmp_anal_cont}
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\includegraphics[width=\linewidth]{fig12}
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\caption{%
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Comparison of the scaled RMP10 Taylor expansion with the exact RMP energy as a function
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of $\lambda$ for the symmetric Hubbard dimer at $U/t = 4$.
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