Density Matrix Approach to Local Hilbert Space Reduction

Chunli Zhang; Eric Jeckelmann; Steven R. White

doi:10.1103/PhysRevLett.80.2661

Density Matrix Approach to Local Hilbert Space Reduction

Superconductivity 2009-10-30 v1 Strongly Correlated Electrons

Authors: Chunli Zhang , Eric Jeckelmann , Steven R. White

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Abstract

We present a density matrix approach for treating systems with a large or infinite number of degrees of freedom per site with exact diagonalization or the density matrix renormalization group. The method is demonstrated on the 1D Holstein model of electrons coupled to Einstein phonons. In this system, two or three optimized phonon modes per site give results as accurate as with 10-100 bare phonon levels per site.

Keywords

density matrix renormalization group density functional theory computational physics

Cite

@article{arxiv.cond-mat/9709187,
  title  = {Density Matrix Approach to Local Hilbert Space Reduction},
  author = {Chunli Zhang and Eric Jeckelmann and Steven R. White},
  journal= {arXiv preprint arXiv:cond-mat/9709187},
  year   = {2009}
}

Comments

4 pages, 4 figures

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