# Topological photonic states in one-dimensional dimerized ultracold atomic chains

@article{Wang2018TopologicalPS, title={Topological photonic states in one-dimensional dimerized ultracold atomic chains}, author={B. Wang and C. Y. Zhao}, journal={Physical Review A}, year={2018}, volume={98}, pages={023808} }

We study the topological optical states in one-dimensional (1D) dimerized ultracold atomic chains, as an extension of the Su-Schrieffer-Heeger (SSH) model. By taking the fully retarded near-field and far-field dipole-dipole interactions into account, we describe the system by an effective non-Hermitian Hamiltonian, vastly different from the Hermitian Hamiltonian of the conventional SSH model. We analytically calculate the complex bandstructures for infinitely long chains, and show that the…

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