
%0 Journal Article
%A Dobson, John F. 
%A Dinte, Bradley P. 
%A Wang, Jun 
%A Gould, Tim 
%T A Novel Constraint for the Simplified Description of Dispersion Forces
%J Australian Journal of Physics
%D 2001/02/23
%V 53
%N 4
%P 575-596
%K 
%R https://doi.org/10.1071/PH00046
%U https://www.publish.csiro.au/paper/PH00046 
%X We propose a novel use of an exact constraint in the construction of simple approximations for response functions of interacting many-electron systems. Within its simplest local version, the resulting theory gives improved approximations for static atomic dipolar polarisabilities without the direct use of wavefunctions or semi-empirical cutoffs. It leads to correct van der Waals energies between distant planar systems, but over-corrects existing cutoff theories for the van der Waals C 6 coefficient for atoms. It is argued that a nonlocal-response version of the constrained theory will do better. 
