Energy error bars in direct configuration interaction iteration sequence

Zsuzsanna Tóth, A. Szabados

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A computational scheme for approximate lower bound to eigenvalues of linear operators is elaborated, based on Löwdin's bracketing function. Implementation in direct full configuration interaction algorithm is presented, generating essentially just input-output increase. While strict lower bound property is lost due to approximations, test calculations result lower bounds of the same order of magnitude, as the usual upper bound, provided by the expectation value. Difference of upper and lower bounds gives an error bar, characterizing the wavefunction at the given iteration step.

Original languageEnglish
Article number084112
JournalThe Journal of Chemical Physics
Volume143
Issue number8
DOIs
Publication statusPublished - Aug 28 2015

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linear operators
Wave functions
configuration interaction
iteration
Mathematical operators
eigenvalues
output
approximation
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Energy error bars in direct configuration interaction iteration sequence. / Tóth, Zsuzsanna; Szabados, A.

In: The Journal of Chemical Physics, Vol. 143, No. 8, 084112, 28.08.2015.

Research output: Contribution to journalArticle

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