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Título

Four electrons interacting pairwise in the limit of infinitesimal confining potentials: Especially the quintet spin state

Autor Akbari, A. ; Amovilli, C.; March, Norman H.; Rubio, Angel
Fecha de publicación 2012
EditorElsevier
Citación Chemical Physics Letters 536: 162-164 (2012)
ResumenIn very recent work, Amovilli and March have considered the Hookean atom with four electrons. In particular, they demonstrated the cross-over from a triplet Pg ground state at large harmonic force constant k to a quintet Su configuration for weak confinement, by means primarily of diffusion quantum Monte Carlo simulation. Here, we focus on such a quintet state for again four spin half fermions but now interacting via a harmonic pair force −K rij. The spatial quintet Ψ is then available, with its eigenvalue. Progress on calculating low-order spinless density matrices is recorded. Finally, this prompts us to examine the Amovilli–March results when extrapolated to small k ≠ 0. We display as k → 0+ approximate results for the four-electron Hookean atom model, including fitted analytic forms for kinetic and Coulomb energy as a function of k as k → 0+.
Versión del editorhttp://dx.doi.org/10.1016/j.cplett.2012.03.098
URI http://hdl.handle.net/10261/95736
DOI10.1016/j.cplett.2012.03.098
Identificadoresdoi: 10.1016/j.cplett.2012.03.098
issn: 0009-2614
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