  Based on the PXP model adapted for Rydberg-blockaded chains, we investigate
dynamics of topological domain walls between different quantum many-body scar
states of $\mathbb{Z}_2$ symmetry. It is found that, the domain walls not only
possess oscillating features of scars but also manifest longstanding bipartite
entanglement with exactly unchanged flip-flop phase difference, suggesting
their potential as quantum information resource. A periodically driven field is
exerted and the high-frequency drive gives rise to a phase transition from
prethermalization to Floquet localization. In order to investigate the
stability of domain walls acting as information carriers, we further simulate
the collision between them and find negligible influence on each other.
Subsequently, the quench dynamics with domain walls reveals exotic physics and
applicable potentials of nonthermalized scar states.
