Hi, Perhaps you can tell us why you want the vector - what you plan on doing with it because there isn't much point of knowing the ground state vector from DMRG unless you have the operator matrices to go along with it. Justin ________________________________________ From: comp-phys-alps-users-bounces@phys.ethz.ch [comp-phys-alps-users-bounces@phys.ethz.ch] On Behalf Of Gang Chen [chggst@physics.ucsb.edu] Sent: Friday, April 24, 2009 3:57 PM To: comp-phys-alps-users@phys.ethz.ch Subject: [ALPS-users] extract the ground state from DMRG or Exact diagonalization Hi All, If I use DMRG or Exact diagonalization to find the ground state of my Hamiltonian. How can I extract the ground state vector (the numerical vector) from my results? best, -- GANG CHEN Department of Physics University of California Santa Barbara, CA 93106 Office: Broida 6216 Phone: 805-893-5260 Fax: 805-893-3378