Numerical study of charge and spin separation in low-dimensional systems
E. A. Jagla, K. Hallberg, C. A. Balseiro
We study numerically the charge and spin separation in low-dimensional systems with local interactions. We consider finite Hubbard systems in one and two dimensions and calculate the ground state. An electron is added to the system in a spatially localized state. The time evolution of this state is obtained and the charge and spin densities are evaluated for different times. In one dimension the charge and spin-wave packets propagate with different velocities. The results are interpreted in terms of the Bethe-ansatz solution. In two dimensions the effect of charge and spin separation is not clearly observed, probably because of the small size of the system.
Physical review. B, Condensed matter•Mar 1, 1993•42 citations