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Regular approach for generating van der Waals Cs coefficients to arbitrary orders

Ovsiannikov, V. and Mitroy, Jim (2006). Regular approach for generating van der Waals Cs coefficients to arbitrary orders. Journal of Physics B: Atomic, Molecular and Optical Physics,39(1):159-187.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 15 times in Scopus Article | Citations

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IRMA ID 80791673xPUB70
Title Regular approach for generating van der Waals Cs coefficients to arbitrary orders
Author Ovsiannikov, V.
Mitroy, Jim
Journal Name Journal of Physics B: Atomic, Molecular and Optical Physics
Publication Date 2006
Volume Number 39
Issue Number 1
ISSN 0953-4075   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-30544451347
Start Page 159
End Page 187
Total Pages 29
Place of Publication UK
Publisher IOP Publishing
Field of Research 0202 - Atomic, Molecular, Nuclear, Particle and Plasma Physics
0205 - Optical Physics
HERDC Category C1 - Journal Article (DEST)
Abstract A completely general formalism is developed to describe the energy E-disp = Sigma(s) C-s/R-s of dispersion interaction between two atoms in spherically symmetric states. Explicit expressions are given up to the tenth order of perturbation theory for the dispersion energy E-disp and dispersion coefficients C, The method could, in principle, be used to derive the expressions for any s while including all contributing orders of perturbation theory for asymptotic interaction between two atoms. The theory is applied to the calculation of the complete series up to s = 30 for two hydrogen atoms in their ground state. A pseudo-state series expansion of the two-atom Green function gives rapid convergence of the series for radial matrix elements. The numerical values of C-s are computed UP to C-30 to a relative accuracy of 10(-7) or better. The dispersion coefficients for the hydrogen-antihydrogen (H-(H) over bar) interaction are obtained from the H-H coefficients by simply taking the absolute magnitude of C-s.
Keywords perturbation-theory
hydrogen-atom
divergence
dependence
intensity
complexes
expansion
forces
field
DOI http://dx.doi.org/10.1088/0953-4075/39/1/013   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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