150 citations · 533 across the 18 of their papers we have counts for
18 papers
Geminal theory within the seniority formalism and bi-variational principle
Stijn De Baerdemacker, Dimitri Van Neck
We present an overview of the mathematical structure of geminal theory within the seniority formalism and bi-variational principle. Named after the constellation, geminal wavefunct…
Bivariational Principle for an Antisymmetrized Product of Nonorthogonal Geminals Appropriate for Strong Electron Correlation
Paul A. Johnson, Paul W. Ayers, Stijn De Baerdemacker +2
We develop a bivariational principle for an antisymmetric product of nonorthogonal geminals. Special cases reduce to the antisymmetric product of strongly-orthogonal geminals (APSG…
The seniority quantum number in Tensor Network States
Klaas Gunst, Dimitri Van Neck, Peter A. Limacher +1
We employ tensor network methods for the study of the seniority quantum number - defined as the number of unpaired electrons in a many-body wave function - in molecular systems. Se…
Richardson-Gaudin Configuration-Interaction for nuclear pairing correlations
Stijn De Baerdemacker, Pieter W. Claeys, Jean-Sébastien Caux +2
Background: The nuclear many-body system is a strongly correlated quantum system, posing serious challenges for perturbative approaches starting from uncorrelated reference states.…
Inner products in integrable Richardson-Gaudin models
Pieter W. Claeys, Dimitri Van Neck, Stijn De Baerdemacker
We present the inner products of eigenstates in integrable Richardson-Gaudin models from two different perspectives and derive two classes of Gaudin-like determinant expressions fo…
Probing pairing correlations in Sn isotopes using Richardson-Gaudin integrability
Stijn De Baerdemacker, Veerle Hellemans, Rianne van den Berg +5
Pairing correlations in the even-even A=102-130 Sn isotopes are discussed, based on the Richardson-Gaudin variables in an exact Woods-Saxon plus reduced BCS pairing framework. The…