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arxiv: cond-mat/0104533 · v1 · pith:5TL42ZANnew · submitted 2001-04-27 · ❄️ cond-mat.str-el

Density-Matrix Algorithm for Phonon Hilbert Space Reduction in the Numerical Diagonalization of Quantum Many-Body Systems

classification ❄️ cond-mat.str-el
keywords density-matrixphononsystemsalgorithmalgorithmsapproachbandbipolaron
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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.

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