Su, Schrieffer, and Heeger in 1979 131 presented a simplified tightbinding model in order to describe quantum-mechanically solitons in polyacetylene chains. Using their Hamiltonian, we are able to write the lattice Green's function for 1D cumulene chain (one atom in the unit cell, thus first Brillouin zone defined as k ∈ [-π, π]) in the following form straightforwardly from the definition: