Improved many-body expansions from eigenvector continuation

Quantum many-body theory has witnessed tremendous progress in various fields, ranging from atomic and solid-state physics to quantum chemistry and nuclear structure. Due to the inherent computational burden linked to the ab initio treatment of microscopic fermionic systems, it is desirable to obtain accurate results through low-order perturbation theory. In atomic nuclei, however, effects such as strong short-range repulsion between nucleons can spoil the convergence of the expansion and make the reliability of perturbation theory unclear. Mathematicians have devised an extensive machinery to overcome the problem of divergent expansions by making use of so-called resummation methods. In large-scale many-body applications, such schemes are often of limited use since no a priori analytical knowledge of the expansion is available. We present here eigenvector continuation as an alternative resummation tool that is both efficient and reliable because it is based on robust and simple mathematical principles.

Duguet, T.Université Paris-Saclay,University Paris-Saclay,Katholieke Universiteit Leuven (författare)
Ekström, Andreas,1980Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)andeks (författare)
Frosini, M.Université Paris-Saclay,University Paris-Saclay (författare)
Hebeler, K.Technische Universität Darmstadt,Helmholtz Zentrum,Helmholtz Center (författare)
Koenig, S.Technische Universität Darmstadt,Helmholtz Zentrum,Helmholtz Center,North Carolina State University (författare)
Lee, D.Michigan State University (författare)
Schwenk, A.Helmholtz Zentrum,Helmholtz Center,Technische Universität Darmstadt,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (författare)
Soma, VUniversité Paris-Saclay,University Paris-Saclay (författare)
Tichai, A.Université Paris-Saclay,University Paris-Saclay,Technische Universität Darmstadt,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Helmholtz Zentrum,Helmholtz Center (författare)
Katholieke Universiteit LeuvenUniversité Paris-Saclay (creator_code:org_t)

Av författaren/redakt...: Demol, P.; Duguet, T.; Ekström, Andreas ...; Frosini, M.; Hebeler, K.; Koenig, S.; visa fler...; Lee, D.; Schwenk, A.; Soma, V; Tichai, A.; visa färre...

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