Irreducible representation of KS orbitals

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martinspenke
Posts: 13
Joined: Wed Feb 12, 2014 2:26 pm

Irreducible representation of KS orbitals

Post by martinspenke » Fri Apr 11, 2014 3:51 am

Hi all,

Is there any possibility to find out the irreducible representations of KS orbitals obtained from abinit for molecules in a box ?

Bests

mverstra
Posts: 655
Joined: Wed Aug 19, 2009 12:01 pm

Re: Irreducible representation of KS orbitals

Post by mverstra » Mon May 26, 2014 10:37 pm

Good question.

This has been worked on from time to time, but is still not in production. The principle is simple, if you already have the wf in a box: apply each symmetry operation in turn, and check the effect on the wf (which should be real), in terms of norm and sign. That gives you the characters - compare to the tables for your point group and you have the irreps. Of course what you want is for abinit to do it for you automatically - not yet I'm afraid.

Matthieu
Matthieu Verstraete
University of Liege, Belgium

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