Color-charge separation in trapped SU(3) fermionic atoms
Abstract
Cold fermionic atoms with three different hyperfine states with SU(3) symmetry confined in one-dimensional optical lattices show color-charge separation, generalizing the conventional spin charge separation for interacting SU(2) fermions in one dimension. Through time-dependent DMRG simulations, we explore the features of this phenomenon for a generalized SU(3) Hubbard Hamiltonian. In our numerical simulations of finite size systems, we observe different velocities of the charge and color degrees of freedom when a Gaussian wave packet or a charge (color) density response to a local perturbation is evolved. The differences between attractive and repulsive interactions are explored and we note that neither a small anisotropy of the interaction, breaking the SU(3) symmetry, nor the filling impedes the basic observation of these effects.
Keywords
Cite
@article{arxiv.1002.3685,
title = {Color-charge separation in trapped SU(3) fermionic atoms},
author = {Tobias Ulbricht and Rafael A. Molina and Ronny Thomale and Peter Schmitteckert},
journal= {arXiv preprint arXiv:1002.3685},
year = {2015}
}