报告人：Nicolas Treps   

主持人：荆杰泰教授   

时间：2022年9月23日（周五）下午16：00   

地点：光学大楼B325会议室   

ZOOM会议 ID：827 3990 6546，密码：123456   

参会链接：https://us05web.zoom.us/j/82739906546?pwd=YXk3U3pYTmpxQ2NaakJ2bkVKNlhydz09   

报告人简介：

Nicolas Treps is full professor at Sorbonne Université, Laboratoire Kastler Brossel. He developed modal analysis of multimode quantum light, which lead to pioneering experiments on quantum metrology, quantum imaging and multimode quantum information. His research is now centred on quantum metrology and quantum information with optical frequency combs, new activities that were funded by an ERC starting grant. Focusing on the continuous variable regime, he develops novel approaches to measurement based quantum computing and parameter estimation. He also applied these concepts to classical application, such as the study of ultrafast laser dynamics and spatial multiplexing. This lead to the co-foundation of CAILabs Start-up Company (50 employees, settled in Rennes), that develops a complete imaging system (lossless transformation of amplitude and phase) with applications to spatial multiplexing in optical fibre (for increased communication data rate) and high power laser welding. He co-authored 2 books, over 120 refereed publications and 6 patents.

报告内容简介：

Optical approaches to quantum information processing are being one of the most promising platform, thanks in particular to the ability to generate very efficiently large entangled states - cluster states. However, there is still many fundamental challenges, in particular on how to generate, measure and certify the class of states necessary for quantum advantage. 

We have developed a platform based on optical time-frequency modes, that we use to multiplex continuous variable quantum information. We use mode selective single photon operation in order to produce multimode non-gaussian states, the key ingredient of continuous variable approach to quantum processing. However, the complexity of these states does not allow for an efficient full tomography. Hence on the one hand we developed tools to characterized and certify specific quantum properties, such as Quantum Non-Gaussianity and Wigner negativity. On the other hand we propose a witness base on steering and Fisher information, to witness purely quantum non-gaussian correlations.