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26 April 2024

» arxiv » cond-mat/0104533

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Density-Matrix Algorithm for Phonon Hilbert Space Reduction in the Numerical Diagonalization of Quantum Many-Body Systems
Alexander Wei{ss}e ; Gerhard Wellein ; Holger Fehske ;
Date:	27 Apr 2001
Journal:	in "High Performance Computing in Science and Engineering 2001", edited by E. Krause and W. Jaeger, Springer, Heidelberg (2002), pp. 131-144
Subject:	Strongly Correlated Electrons \| cond-mat.str-el
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.
Source:	arXiv, cond-mat/0104533
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