CCL:G: External electric field



 Sent to CCL by: Thomas Exner [texner^gmx.net]
 Dear CCLers:
 
I am interested in the influences of an external electric field on the electron density distribution and structure of my molecule. It is very easy to include such a field in the quantum calculations using e.g. gaussian but I am wondering how I can relate such microscopic fields to the macroscopic field. The used atomic units sound extremely large.
 Thank you very much for your advice.
 Thomas