Effects of interaction and polarization on spin-charge separation: A time-dependent spin-density-functional theory study
arXiv:1101.3373 · doi:10.1103/PhysRevB.81.104306
Abstract
We calculate the nonequilibrium dynamic evolution of a one-dimensional system of two-component fermionic atoms after a strong local quench by using a time-dependent spin-density-functional theory. The interaction quench is also considered to see its influence on the spin-charge separation. It is shown that the charge velocity is larger than the spin velocity for the system of on-site repulsive interaction (Luttinger liquid), and vise versa for the system of on-site attractive interaction (Luther-Emery liquid). We find that both the interaction quench and polarization suppress the spin-charge separation.
8 pages, 9 figures
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