I found that dipole moments can be set on atoms as described in: http://lammps.sandia.gov/doc/dipole.html . What i am confused about is as dipole moment is a vector quantity where am i suppose to specify that. Also the documentation says that it is only used when the atom_style requires it. However i intend to use it with a fully atomistic model (where the atoms are actually super atoms, obtained after coarse graining of the real model). Will i be able to specify dipole in that case. I very much appreciate any inputs.