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Quantum technology in lithium niobate waveguides.
Lithium niobate is one of the most used materials for the fabrication of integrated optical devices. This is because of its large nonlinearity and electro-optic effect which enables the manufacturing of fast amplitude and phase modulators. Recently this material has been used as a platform for quantum photonics applications including the generation and manipulation of nonclassical states of light on chip. The monolithic nature of these devices means that the correct phase can be stably realized in what would otherwise be an unstable interferometer, greatly simplifying the task of implementing sophisticated photonic quantum circuits. Using this material platform, experimental results on the generation, manipulation, and detection of squeezed vacuum state on chip will be reported, which represents an essential resource for continuous variable quantum computation. Finally, frequency conversion of single photons, and integration of multiple components on chip will be discussed.