Integrated end-user configurable all-optical atomic simulator on a PPLN chip

We show that 1D array of nonlinear evanescently-coupled waveguides could be used as a quasi 2D lattice via a synthetic frequency dimension induced by nonlinear coupling. We demonstrate the analogy of this platform to a multi-level atom interacting with light for classical and quantum photonic states. Using this framework, we adapt well-known coherent processes from atomic optics, such as electromagnetically induced transparency and stimulated Raman adiabatic passage to design novel photonic devices. Owing to demonstrated ultra-low noise of sum-frequency generation in lithium niobate, our devices are particularly useful for quantum information applications: quantum memory and quantum transduction.