Quantum Waveguides for Indistinguishable Single Photon Sources 2 (QWISPS-2)

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Covesion Ltd and The University of Southampton plan to extend our collaborative feasibility study investigatingthe use of periodically-poled lithium niobate crystals in single-photon sources for applications exploitingquantum entanglement. Laser pulses contain different numbers of photons and in our crystals these photonscan be split into pairs; the laws of physics state that if one of these photons is created then the other must alsoexist. Based on this premise, detecting one paired photon signals the presence of the other, providing apredictable source of single photons that can be used for computation. In this project, we seek to reduce themanufacturing tolerances required to generate similar photons from different sources and our objective is toprove our new approach across multiple devices. This is an important step in enabling scalable quantumapplications where many predictable photons with the same attributes are needed in parallel, such as quantumcomputing.