Density-Matrix Algorithm for Phonon Hilbert Space Reduction in the Numerical Diagonalization of Quantum Many-Body Systems
arXiv:cond-mat/0104533 · doi:10.1007/978-3-642-56034-7_12
Abstract
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.
14 pages, 6 figures, Workshop on High Performance Computing in Science and Engineering, Stuttgart 2001