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Comparison of an improved self-consistent lower bound theory with Lehmann’s method for low-lying eigenvalues
Ritz eigenvalues only provide upper bounds for the energy levels, while obtaining lower bounds requires at least the calculation of the variances associated with these eigenvalues. The well-known Weinstein and Temple lower bounds based on the eigenvalues and variances converge very slowly and their...
| Autores principales: | , , |
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| Formato: | Online Artículo Texto |
| Lenguaje: | English |
| Publicado: |
Nature Publishing Group UK
2021
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| Materias: | |
| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8648772/ https://www.ncbi.nlm.nih.gov/pubmed/34873195 http://dx.doi.org/10.1038/s41598-021-02473-y |