Electron-hole generations: A numerical approach to interacting fermion systems

Details Electron-hole generations: A numerical approach to interacting fermion systems Electron-hole generations: A numerical approach to interacting fermion systems

2002-01-24

arxiv.org/abs/cond-mat/0201442v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 4 figures

Scientific paper

10.1016/S0038-1098(03)00523-4

A new approach, motivated by Fock space localization, for constructing a reduced many-particle Hilbert space is proposed and tested. The self-consistent Hartree-Fock (SCHF) approach is used to obtain a single-electron basis from which the many-particle Hilbert space is constructed. For a given size of the truncated many particle Hilbert space only states with the lowest number of particle-hole excitations are retained and exactly diagonalized. This method is shown to be more accurate than previous truncation methods, while there is no additional computational complexity.

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