1996/06/28 by Stefan Rommer, Stellan Ostlund · 1 citation
Physics and Astronomy · #cond-mat
paper · pdf · doi:10.1103/physrevb.55.2164
published as Phys. Rev. B 55, p.2164 (1997) · RevTeX, 49 pages including 4 figures (macro included). Uuencoded with uufiles. A complete postscript file is available at http://fy.chalmers.se/~tfksr/prb.dmrg.ps
arxiv created 1996/06/28 · arxiv updated 2009/11/30
We investigate the density matrix renormalization group (DMRG) discovered by White and show that in the case where the renormalization eventually converges to a fixed point the DMRG ground state can be simply written as a ``matrix product'' form. This ground state can also be rederived through a simple variational ansatz making no reference to the DMRG construction. We also show how to construct the ``matrix product'' states and how to calculate their properties, including the excitation spectrum. This paper provides details of many results announced in an earlier letter.