Polarisation Entangled Photon Emitter

量子技术将改变和改善我们生活的关键方面。举几个例子，它们将保护我们的隐私，保护数字通信免受任何网络攻击，将计算机的速度推到新的水平，使最微弱的物体能够成像，并将其应用于安全和医疗。尽管这些成果中很少有走向商业化的，如量子安全通信，但其他成果仍远未成为一项强大的技术。英国政府投入了大量资源，推动将学术机构现有的科学转化为造福公众的技术。为了实现这场量子革命，我们需要将学术界现有的技术诀窍、我们高科技公司的技术能力以及该技术潜在用户的反馈结合起来。通过这项提议，我们正在遵循这一建议，目标是开发第一个可见的、纠缠的光子商业来源，适用于从安全通信到计量学的各种应用。纠缠光是解锁量子力学提供的可能性的关键，也是量子密钥分发和量子计算等许多应用的起点。建立纠缠光源所需的组件是激光器和将激光转化为纠缠光子的合适的晶体。Chromacity是英国激光系统市场的领先者，而Covesion是用于产生纠缠光子的晶体供应的世界领先者。因此，我们建议与这些公司合作，将我们在量子光学方面的技术诀窍带到这里。在量子光学和量子技术方面，格拉斯哥大学确实是英国和世界上领先的机构。总而言之，我们拥有生产能力、工程技能和供应链，可以将可见的纠缠光子源推向市场。学术团队在这个项目中的作用是双重的。一方面，我们将从两家合作公司提供的技术开始，指导产生纠缠态所需的光学组件的设计。我们将利用我们在实验室中产生纠缠态的经验，向两家公司通报非线性晶体参数的最佳选择，激光与非线性元件相互作用的几何形状，以及量化所达到的纠缠水平所需的适当测量程序。因此，这将是一项旨在将学术诀窍转化为商业现实的知识转移行动。另一方面，我们将测试Chromacity和Covesion联合工作产生的结果。在这种情况下，格拉斯哥大学的团队将是测试者。我们确实是潜在量子光学市场的最终用户，因为我们的大多数研究都需要进行纠缠态。因此，我们将向这些公司提供关于性能、包装和用户友好性的反馈。随着量子光学的研究在学术界变得越来越普遍，越来越多的研究人员将寻找纠缠态的即插即用来源。

Quantum technologies will transform and improve crucial aspects of our life. To name a few, they will protect our privacy, and secure digital communications from any cyber attack, push the speed of computers to new levels, enable imaging the faintest objects, with applications to security and healthcare.While few of these outcomes are moving towards commercialisation, such as quantum-secured communications, others are still far from being a robust technology. The UK government has invested substantial resources in promoting the translation of the science available in academic institutions into technologies for the benefit of the public. For this quantum revolution to happen, we need to combine the know-how available in the academia, the technical capabilities of our high-tech companies, and the feedback from potential users of the technology.With this proposal, we are following this receipt, targeting the development of the first commercial source of visible, entangled photons, suitable for applications ranging from secure communication to metrology. Entangled light is the key to unlock the possibilities offered by quantum mechanics, and is the starting point for many applications, such quantum-key distribution and quantum computing. The components required to build an entangled light source are a laser and a suitable crystal that converts the laser light into entangled photons. Chromacity is a UK leader in the market of laser systems while Covesion is a world leader in the supply of crystals for the generation of entangled photons. We propose therefore to partner with these companies bringing our know-how in quantum optics. The University of Glasgow is indeed a leading institution in the UK, and the world, for what concern quantum optics and quantum technologies. Together, we have the production capabilities, the engineering skills, and the supply chain, to bring a visible source of entangled photons on the market. The role of the academic team in this project is twofold. On the one hand, we shall guide the design of the optical components required to generate the entangled states, starting from the technology provided by the two partner companies. We shall exploit our experience in the generation of entangled states in a lab to inform the two companies on the best choice of the nonlinear crystals parameters, the geometry of the laser interaction with the nonlinear elements, and on the proper measurement procedure required to quantify the level of entanglement achieved. This will be, therefore, a knowledge transfer action, aimed at bringing the academic know-how into a commercial reality. On the other hand, we will test the results produced by the joint work of Chromacity and Covesion. In this scenario, the University of Glasgow team will be the beta-tester. We are indeed end-users in the potential quantum-optical market since most of our research requires entangled states to be carried on. We shall, therefore, provide our feedback to the companies, concerning performances, packaging and user-friendliness. As the research in quantum optics becomes increasingly common in academia, a growing number of researchers will look for "plug and play" sources of entangled states.