  Nonequilibrium electronic transport through a polymer chain is investigated
by the scattering state operator method. The polymer chain is described by an
electron-lattice coupling model and its two ends are connected with metal
electrodes of different chemical potentials. The scattering states are shown to
be a set of complete eigenstates of electrons in the system at nonequilibrium
steady state. With the method, we show that the nonequilibrium Peierls
transition (NEPT) does not survive the lattice relaxation and the
soliton-antisoliton pair excitations. Furthermore the electronic transport
though the chain is shown to be accomplished through the soliton-lattice energy
band.
