Optimized phonon approach for the diagonalization of electron-phonon problems
Alexander Weiße, Holger Fehske, Gerhard Wellein +1 more
We propose an optimized phonon approach for the numerical diagonalization of interacting electron-phonon systems combining density-matrix and Lanczos algorithms. We demonstrate the reliablity of this approach by calculating the phase diagram for bipolaron formation in the one-dimensional Holstein-Hubbard model, and the Luttinger parameters for the metallic phase of the half-filled one-dimensional Holstein model of spinless fermions.
arXiv:cond-mat/0003125•Physical review. B, Condensed matter•Jul 1, 2000•62 citations