An Improved Initialization Procedure for the Density-Matrix Renormalization Group

Details An Improved Initialization Procedure for the Density-Matrix Renormalization Group An Improved Initialization Procedure for the Density-Matrix Renormalization Group

2007-02-09

arxiv.org/abs/cond-mat/0702242v2

J. Phys. Soc. Jpn. 76, 053001 (May 2007)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, submitted to JPSJ

Scientific paper

10.1143/JPSJ.76.053001

We propose an initialization procedure for the density-matrix renormalization group (DMRG): {\it the recursive sweep method}. In a conventional DMRG calculation, the infinite-algorithm, where two new sites are added to the system at each step, has been used to reach the target system size. We then need to obtain the ground state for a different system size for every site addition, so 1) it is difficult to supply a good initial vector for the numerical diagonalization for the ground state, and 2) when the system reduced to a 1D system consists of an array of nonequivalent sites as in ladders or Hubbard-Holstein model, special care has to be taken. Our procedure, which we call the {\it recursive sweep method}, provides a solution to these problems and in fact provides a faster algorithm for the Hubbard model as well as more complicated ones such as the Hubbard-Holstein model.

Affiliated with

Also associated with

No associations

Rating

An Improved Initialization Procedure for the Density-Matrix Renormalization Group does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with An Improved Initialization Procedure for the Density-Matrix Renormalization Group, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An Improved Initialization Procedure for the Density-Matrix Renormalization Group will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-8081