Combining density-matrix and Lanczos algorithms we propose a new optimized phonon approach for finite-cluster diagonalizations of interacting electron-phonon systems. To illustrate the efficiency and reliability of our method, we investigate the problem of bipolaron band formation in the extended Holstein Hubbard model.
@article{arxiv.cond-mat/0104533,
title = {Density-Matrix Algorithm for Phonon Hilbert Space Reduction in the Numerical Diagonalization of Quantum Many-Body Systems},
author = {Alexander Weiße and Gerhard Wellein and Holger Fehske},
journal= {arXiv preprint arXiv:cond-mat/0104533},
year = {2013}
}
Comments
14 pages, 6 figures, Workshop on High Performance Computing in Science and Engineering, Stuttgart 2001