English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

General formulas for calculating the several leading long-range interactionsamong three identical atoms where two atoms are in identical $S$ states and theother atom is in a $P$ state are obtained using perturbation theory for theenergies up to second order. The first order (dipolar) interactions depend onthe geometrical configurations of the three atoms. In second order, additiveand nonadditive dispersion interactions are obtained. The nonadditiveinteractions depend on the geometrical configurations in marked contrast to thecase where all three atoms are in identical $S$ states, for which thenonadditive (also known as triple-dipole or as Axilrod-Muto-Teller) dispersioninteractions appear at the third order. The formalism is demonstrated by thecalculation of the coefficients for theLi($2\,^2S$)-Li($2\,^2S$)-Li($2\,^{2}P$) system using variationally-generatedatomic lithium wave functions in Hylleraas coordinates. The present dipolarcoefficients and additive and nonadditive dispersion coefficients may be usefulin constructing precise potential energy surfaces for this three lithium atomsystem.

Calculations of long-range three-body interactions for Li($2\,^2S$)-Li($2\,^2S$)-Li($2\,^2P$)