LAUSR

Efficient manipulation of quantum states is a key step towards applications in quantum information, quantum metrology, and nonlinear optics. Recently, atomic arrays have been shown to be a promising system for exploring topological quantum optics and robust control of quantum states, where the inherent nonlinearity is included through long-range hoppings. Here we show that a one-dimensional atomic array in a periodic magnetic field exhibits characteristic properties associated with an effective two-dimensional Hofstadter-butterfly-like model. Our work points out super- and sub-radiant topological edge states localized at the boundaries of the atomic array despite featuring long-range interactions, and opens an avenue of exploring an interacting quantum optical platform with synthetic dimensions.Efficient manipulation of quantum states is a key step towards applications in quantum information, quantum metrology, and nonlinear optics. In this paper, the authors show that 1D atomic arrays in a periodic magnetic field can realize an effective 2D Hofstadter-butterfly-like model with synthetic dimensions exhibiting super- and sub-radiant topological edge states despite featuring long-range interactions.