Calculated photoinduced dynamics in trans-polyacetylene

The generation and dynamics of self-localized excitations in polyacetylene following a resonant fs pulse after introduction of some nucleation centres are calculated using the Su-Schrieffer-Heeger model. We obtain and investigate soliton pairs with an oscillating dipole moment and localized breathers. Furthermore, the linear photoinduced absorption is calculated and discussed in random phase approximation using the instantaneous eigenstates.