Generation of entAngLement for quAntum seCure mulTIparty Computation

量子技术即将给我们的社会带来革命性的变化。在这场新的科技革命的核心，纠缠是量子物理学中最奇怪的现象之一。产生、操纵和分布纠缠粒子的能力是推动科学和工业变革的先决条件。本研究项目旨在开发高效的纠缠光子源，以适应当前的光纤基础设施。该研究项目将集中在四个主要方面：1)与量子光学公司合作设计和模拟新的集成光子结构。在这种情况下，将利用时域有限差分方法来模拟高非线性材料制成的微环谐振器，并改进集成结构设计，以优化三阶非线性过程，从而有效地产生纠缠光子对。创新之处在于使用Quantopticon软件，与英国Fraunhofer和Bay Photonics合作，对集成的光子结构和封装进行微制造。创新之处在于使用新的配方，以最大限度地减少所考虑材料以及光纤和集成芯片之间的耦合界面上的光学损失；3)Ki3 Photonics在量子领域实施、封装和测试集成组件。光学芯片将在量子领域进行测试，并与高效的控制电子学集成，以产生纠缠光子对。创新之处在于用于产生分布在光学频率梳上的光子对的光学方案，即具有广泛均匀间隔频率模式的光源；4)与Galaxy Innovation合作，实施适应于开发的光子源的新的量子多方计算协议，使用频率和时间自由度。这项活动将导致在通信网络中实现打包的纠缠光子源，目的是展示量子安全多方计算的优势。

Quantum technologies are poised to revolutionize our society. At the core of this new scientific and technological revolution, there is entanglement one of the most peculiar phenomena in quantum physics. The ability to generate, manipulate and distribute entangled particles is a prerequisite to enable transformative scientific and industrial progress.This research project aims for the development of efficient sources of entangled photons, adapted to the current optical fiber infrastructure.It will concentrate on four main aspects related to1) the design and simulation of new integrated photonics structure in collaboration with Quantopticon. In this case, Finite-Difference Time-Domain methods will be used to simulate micro-ring resonators made of high nonlinear materials and improve the integrated structures design to optimize third order nonlinearity processes and thus the efficient generation of entangled photons pairs. The innovation stands in the use of Quantopticon software2) Microfabrication of integrated photonic structures and packaging in collaboration with UK Fraunhofer and Bay Photonics. The innovation stands in the use of new recipes to minimize optical losses in the considered material and at the coupling interface between optical fiber and integrated chip;3) Implementation, packaging and testing of integrated components in the quantum domain by Ki3 Photonics. Optical chips will be tested in the quantum domain and integrated with efficient control electronics for the generation of pairs of entangled photons. The innovation stands in the optical scheme used to generate photon pairs which are distributed over an optical frequency comb i.e. light sources with a broad spectrum of evenly-spaced frequency modes;4) Implementation of new quantum multiparty computing protocols adapted to the developed source of photons, using frequency and time degrees of freedom in collaboration with Galaxy Innovation. This activity will lead to the implementation of the packaged entangled photon source in a communication network with the aim to demonstrate the advantage of quantum-secure multiparty computation.