HIPERCOM

自20世纪60年代以来，相干光学就被认为是在光通信中实现非常高的带宽和比特率的最佳工具。虽然20世纪80年代光纤放大器的发展已经减少了开发这种技术的需要，但量子信息科学的出现已经引发了对使用相干光学来实现高速率量子通信系统的新兴趣。本项目的重点是相干量子通信作为一种方式结合联合收割机的内在非常高的速率可实现的零差或外差检测与使用量子力学的基本好处，如无条件的security. Different与经典的通信系统，光放大器不能被用作中继器在量子通信设置，因为它是固有的量子噪声的限制。该项目的主旨是探索不同的技术，旨在规避这一问题，并提高相干（也称为连续变量）量子通信系统的范围，特别强调当今最发达的实际应用平台，即连续变量量子密钥分发。为了实现这一目标，将采取不同的战略，从使用经典编码和其他后处理算法，这是短期内最直接适用的解决方案，到依赖于特定量子光学方案并最终使用量子编码的更复杂的长期技术。特别地，将详细地研究预示无噪声线性放大器或其他非高斯预示操作提供的潜在解决方案。我们的联盟的特殊性是将5个在相干领域具有杰出记录的学术团体的力量联合收割机结合起来。（连续变量）量子信息科学，包括2个理论（布鲁塞尔自由大学、约克大学）和3个实验性（Institut d 'Optique Graduate School，Max Planck Institute for the Science of Light，Telecom巴黎技术学院）集团，与一个工业合作伙伴（SeQureNet）一起，自然将研究方向转向信息社会的需求。我们设想，应用和基础-理论和实验-团队之间的这种协同作用将是高度激励和富有成效的，并将加强欧洲在信息技术方面的竞争力。

Coherent optics has been known since the 1960's to be, in principle, the best tool to achieve very high bandwidths and bit rates in optical communication. While the development of fiber optical amplifiers in the 1980's has reduced the need for developing such a technology, the advent of quantum information sciences has triggered a renewed interest in using coherent optics to realize high-rate quantum communication systems. The present project is focused on coherent quantum communication as a way to combine the intrinsically very high rates achievable by homodyne or heterodyne detection with the fundamental benefits of using quantum mechanics such as unconditional security.Unlike with classical communication systems, an optical amplifier cannot be used as a repeater in a quantum communication setup because it is inherently limited by quantum noise. The thrust of this project is to explore different techniques aiming at circumventing this problem and improving the range of coherent (also called continuous-variable) quantum communication systems, with a special emphasis on today's most developed platform towards practical applications, namely continuous-variable quantum key distribution. Different strategies will be followed in order to attain this goal, ranging from the use of classical coding and other post-processing algorithms, which is the most directly applicable solution in the short term, to more elaborate longer-term techniques relying on specific quantum optical schemes and ultimately on the use of quantum coding. In particular, the potential solutions offered by the heralded noiseless linear amplifier, or other non-Gaussian heralded operations, will be investigated in detail.The specificity of our consortium is to combine the strength of 5 academic groups having an outstanding track record in the area of coherent (continuous-variable) quantum information science, including 2 theory (Universite Libre de Bruxelles, University of York) and 3 experimental (Institut d'Optique Graduate School, Max Planck Institute for the Science of Light, Telecom Paris Tech) groups, together with 1 industrial partner (SeQureNet) who will naturally orient the research towards the needs of the information society. We envision that this synergy between applied and fundamental - both theoretical and experimental - teams will be highly stimulating and productive, and will reinforce European competitiveness in information technologies.