Storing the eigenvectors would be prohibitively large, however one can in principle calculate fidelities from the matrices stored by the DMRG code. This is not easy though since you will have to edit the code. It might be easier if you learn to write a simple MPS code yourself.

On 18 Jan 2014, at 10:28, hamid mosadegh hamid.mosadegh@gmail.com wrote:

Dear All I want to evalute fedility using eigenvectors. Is it possible to get eigenvectors in DMRG caculations. Thanks

-- H. Mosadeq Ph.D. student of Physics, Isfahan Univ. of Technology, Isfahan 84156, Isfahan, IRAN