Why would you like to add that?
I don't understand that you need to add a term to find the ground state, since you will find the ground state of whatever model you put in.
On 27 Sep 2014, at 21:22, hamid mosadegh hamid.mosadegh@gmail.com wrote:
Dear all
It seems that we must put a potential on boundary to obtain the ground state using DMRG. How i can add a term as V/2*(n(1)+n(L)) to fermion model in models.xml
Thanks
-- H. Mosadeq Shahr-e-Kord University (SKU), Shahr-e-Kord , Iran