one more ref

TrUEGs.bib

@@ -1,13 +1,27 @@
 %% This BibTeX bibliography file was created using BibDesk.
 %% https://bibdesk.sourceforge.io/
 
-%% Created for Pierre-Francois Loos at 2021-11-26 18:15:28 +0100 
+%% Created for Pierre-Francois Loos at 2022-03-10 10:04:02 +0100 
 
 
 %% Saved with string encoding Unicode (UTF-8) 
 
 
 
+@article{White_1971,
+	author = {White, Ronald J. and Stillinger, Frank H.},
+	date-added = {2022-03-10 10:03:18 +0100},
+	date-modified = {2022-03-10 10:03:32 +0100},
+	doi = {10.1103/PhysRevA.3.1521},
+	journal = {Phys. Rev. A},
+	month = {May},
+	pages = {1521--1535},
+	title = {Electron Correlation in Three-Electron Atoms and Ions},
+	volume = {3},
+	year = {1971},
+	bdsk-url-1 = {https://link-aps-org-s.docadis.univ-tlse3.fr/doi/10.1103/PhysRevA.3.1521},
+	bdsk-url-2 = {https://doi.org/10.1103/PhysRevA.3.1521}}
+
 @article{Gori-Giorgi_2008,
 	abstract = {The correlation energy in density functional theory can be expressed exactly in terms of the change in the probability of finding two electrons at a given distance r12 (intracule density) when the electron--electron interaction is multiplied by a real parameter λ varying between 0 (Kohn--Sham system) and 1 (physical system). In this process{,} usually called adiabatic connection{,} the one-electron density is (ideally) kept fixed by a suitable local one-body potential. While an accurate intracule density of the physical system can only be obtained from expensive wavefunction-based calculations{,} being able to construct good models starting from Kohn--Sham ingredients would highly improve the accuracy of density functional calculations. To this purpose{,} we investigate the intracule density in the λ → ∞ limit of the adiabatic connection. This strong-interaction limit of density functional theory turns out to be{,} like the opposite non-interacting Kohn--Sham limit{,} mathematically simple and can be entirely constructed from the knowledge of the one-electron density. We develop here the theoretical framework and{,} using accurate correlated one-electron densities{,} we calculate the intracule densities in the strong interaction limit for few atoms. Comparison of our results with the corresponding Kohn--Sham and physical quantities provides useful hints for building approximate intracule densities along the adiabatic connection of density functional theory.},
 	author = {Gori-Giorgi, Paola and Seidl, Michael and Savin, Andreas},
@@ -1508,7 +1522,8 @@
 	pages = {283001},
 	title = {Perturbation Theory in the Complex Plane: Exceptional Points and Where to Find Them},
 	volume = {33},
-	year = {2021}}
+	year = {2021},
+	bdsk-url-1 = {https://doi.org/10.1088/1361-648X/abe795}}
 
 @article{Moreau_2004,
 	author = {Moreau, Y. and Loos, P.-F. and Assfeld, X.},

TrUEGs.tex

@@ -266,7 +266,7 @@ Expanding the two HF orbitals of the $^3P$ ground state in a basis of zonal harm
 is uniform.
 At $\cc \approx -7$, however, $\tilde{\rho}^\text{HF}(\theta)$ is \textit{locally} uniform around $\theta = \frac{\pi}{2}$
 (\ie, in a belt closely above and below the $xy$ plane), as shown in Fig.~\ref{fig:HF}. 
-We believe that this outcome is a direct consequence of the single-determinant nature of the HF approximation which, by definition, can only include one (linear combination) of the three equivalent $sp$ configurations (\ie, $sp_x$,  $sp_y$, and $sp_z$).
+We believe that this outcome is a direct consequence of the single-determinant nature of the HF approximation which, by definition, can only include one (linear combination) of the three equivalent $sp$ configurations (\ie, $sp_x$,  $sp_y$, and $sp_z$). \cite{White_1971}
 The fact that this phenomenon appears at larger (absolute) $\cc$ values in the HF approximation is not surprising as, contrary to the repulsive regime (\ie, $\cc > 0$) where the electrons are too close to each other at the HF level (compared to the exact picture), \cite{Gori-Giorgi_2008,Pearson_2009} in the attractive regime (\ie, $\cc < 0$) they are too far away from each other. 
 This implies that the interaction strength has to be greater (which is equivalent to a larger absolute value of $\cc$) to overcome this drawback. \cite{Seidl_2010,Burton_2019a,Marie_2020}