Dynamics of the Two-Site Hubbard Model

Details Dynamics of the Two-Site Hubbard Model Dynamics of the Two-Site Hubbard Model

1996-08-06

arxiv.org/abs/cond-mat/9608025v1

Physics

Condensed Matter

14 pages, LaTeX; 3 PostScript figures

Scientific paper

The dynamical evolution of a two-site Hubbard model is derived in the presence of an uniform external magnetic field for a general initial state. The time evolution of the half-filled (two-particle) case has a complex behaviour. Under certain initial conditions, the average number of fermions in one-particle state, in the half-filled case, is not necessarily periodic, even though the magnetization remains periodic. The results obtained may be applied to study the magnetization and the transition dipole moment of the organic charge-transfer salts in the in-phase mode.

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