Subject: non additivity

From: Christophe Biot <cbiot(at)ulb.ac.be>
Date: Tue, 30 Mar 2004 21:28:58 +0200

Dear all,

It's well known that description of dispersion interactions responsible 
(for example) for the stabilization of the stacked nucleic acid bases in 
DNA requires inclusion of the effects of correlation.

I am just asking myself how dispersion is taken into account when 
calculating the total interaction energy into many-body interaction 
contributions?
For example, at HF or MP2 level. Is there a difference when performing 
CCSD(T) calculations?

Best wishes,

Christophe Biot