报告题目：Multipartite entanglement: from triplet photon generation, coupled nonlinear waveguides to frequency coding

报告人：Prof. Kamel Bencheikh (Centre of Nanoscience and Nanotechnology – C2N, Université Paris-Sud - Université Paris-Saclay, France)

时间：2019年6月13日（周四）下午5:00

地点：光电所二层报告厅

摘要：Entanglement has morphed from thought experiments into laboratory reality in a century and is the cornerstone of future quantum technologies. The enormous potential of entanglement to secure and parallelize information processing and transmission can only be achieved by relying on innovative sources and platforms and custom detection systems. I will in my talk address the issue of the sources we are exploring in our group at C2N.Triple photon generation It is based on a third order nonlinear optical interaction and it is the most direct way to produce pure quantum three-photon states. These states can exhibit three-body quantum entanglement and their statistics go beyond the usual Gaussian statistics of coherent sources and optical parametric twin-photon generators, offering new tools for quantum mechanics. Nonlinear waveguide arrays provide an integrated platform for quantum information compatible with telecom wavelength. By engineering their design, controlling the coupling strength between adjacent waveguides and the strength of the nonlinearity, we can generate entanglement among the modes propagating in the arrays.The third avenue we are exploring in our group is the frequency domain quantum information where qubit or high dimensional quantum bits are encoded on distinguishable optical frequencies.During my talk, I will discuss these three avenues focusing on our results on triple photons states and coupled nonlinear waveguides and will mention our starting project on frequency domain quantum information.