Density-Matrix Algorithm for Phonon Hilbert Space Reduction in the Numerical Diagonalization of Quantum Many-Body Systems
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.
- Publication:
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arXiv e-prints
- Pub Date:
- April 2001
- DOI:
- arXiv:
- arXiv:cond-mat/0104533
- Bibcode:
- 2001cond.mat..4533W
- Keywords:
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- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 14 pages, 6 figures, Workshop on High Performance Computing in Science and Engineering, Stuttgart 2001