Photon-Mediated Localization in Two-Level Qubit Arrays
Janet Zhong, Nikita A. Olekhno, Yongguan Ke, A. V. Poshakinskiy, Chaohong Lee, Yuri S. Kivshar, Alexander N. Poddubny · Physical Review Letters · 2020
We predict the existence of a novel interaction-induced spatial localization in a periodic array of qubits coupled to a waveguide. This localization can be described as a quantum analogue of a self-induced optical lattice between two indistinguishable photons, where one photon creates a standing wave that traps the other photon. The localization is caused by the interplay between on-site repulsion due to the photon blockade and the waveguide-mediated long-range coupling between the qubits.