  Topologically nontrivial states, the solitons, emerge as elementary
excitations in 1D electronic systems. In a quasi 1D material the topological
requirements originate the spin- or charge- roton like excitations with charge-
or spin- kinks localized in the core. They result from the spin-charge
recombination due to confinement and the combined symmetry. The rotons possess
semi-integer winding numbers which may be relevant to configurations discussed
in connection to quantum computing schemes. Practically important is the case
of the spinon functioning as the single electronic pi- junction in a quasi 1D
superconducting material.
