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Integrated photonics is at the heart of many classical technologies, fromoptical communications to biosensors, LIDAR, and data center fiberinterconnects. There is strong evidence that these integrated technologies willplay a key role in quantum systems as they grow from few-qubit prototypes totens of thousands of qubits. The underlying laser and optical quantumtechnologies, with the required functionality and performance, can only berealized through the integration of these components onto quantum photonicintegrated circuits (QPICs) with accompanying electronics. In the last decade,remarkable advances in quantum photonic integration and a dramatic reduction inoptical losses have enabled benchtop experiments to be scaled down to prototypechips with improvements in efficiency, robustness, and key performance metrics.The reduction in size, weight, power, and improvement in stability that will beenabled by QPICs will play a key role in increasing the degree of complexityand scale in quantum demonstrations. In the next decade, with sustainedresearch, development, and investment in the quantum photonic ecosystem (i.e.PIC-based platforms, devices and circuits, fabrication and integrationprocesses, packaging, and testing and benchmarking), we will witness thetransition from single- and few-function prototypes to the large-scaleintegration of multi-functional and reconfigurable QPICs that will define howinformation is processed, stored, transmitted, and utilized for quantumcomputing, communications, metrology, and sensing. This roadmap highlights thecurrent progress in the field of integrated quantum photonics, futurechallenges, and advances in science and technology needed to meet thesechallenges.