Novel sources for quantum entanglement

该项目包括开发一系列有效产生纠缠光子的新方法及其纠缠特性。我们的目标是通过将这些来源和方法应用于专门回应纠缠的成像技术来证明它们的可行性。出发点将是最近使用Sagnac干涉仪配置的光子对产生的演示。然后，目标将是以一种有效的方式展示纠缠，也许还使用相机技术。这反过来将允许尝试通过一个具有特定全息图印记的超颖表面来成像纠缠态，该全息图只对某些偏振做出响应。然后，这将导致成像方法的首次演示，该方法需要纠缠以解码包含在例如超表面中或更一般地在任何空间光束整形设备中的信息。

The project consists in developign a series of new methods for the efficient generation of entangled photons and the characterisation of their entanglement. The goal will be to demonstrate the feasibility of these sources and methods by applying them to imaging technologies that reply exclusively on entanglement. The starting point will be recent demonstrations of photon pair generation using Sagnac interferometer configurations. The goal will then be to demonstrate entanglement in an efficient manner, maybe using also camera technology. This in turn will allow to then attempt to image entangled states through a metasurface that has specific hologram imprinted that responds only to certain polarisations. This will then lead to the first demonstration of imaging approaches that require entanglement in order to decode information contained, for example, in a metasurface or, more in general in any spatial light beam shaping device.