Integrated quantum photonic system has become a promising candidate for next-generation quantum optical system. Thanks to the scalability and strong light-matter interactions, such nanophotonic systems can realize compactness, large-scale integration, stability, and novel optical functionalities simultaneously. In this talk, I will introduce our experimental works in the fields of the integrated lithium niobate photonics. First, we demonstrate a set of nonlinear photon-pair generations for the nonlinear quantum photonic sources. Next, I will show our works on lithium-niobate integrated quantum photonic circuits for the application in quantum communications and variational quantum simulations.
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