Abstract:  

　　Single-photon sources based on semiconductor quantum dots offer distinct advantages for quantum information, including a scalable solid-state platform, ultrabrightness and interconnectivity with matter qubits. A key prerequisite for their use in optical quantum computing and solid-state quantum networks is a high level of efficiency, tunability, indistinguishability, and robustness. In this talk, I will our recent experiments on generating deterministic, highly indistinguishable, robust and tunable single photons from a single quantum dot. The methods used include pulsed resonance fluorescence, adiabatic rapid passage, and spin-flip Raman scattering. Two-photon interference was observed from the same dot with an indistinguishablity up to 99.5% and remotes dots up to 87%. The resonantly emitted photons and the ground-state spin can be in Greenberger-Horne-Zeilinger-type entanglement, and can be utilized to remotely prepare arbitrary spin state by measuring the photon state. Finally, using two laser excitation can doubly dress a quantum dot exciton state and can dynamically cancel spectral lines via quantum interference. 

简介： 

　　陆朝阳，1982年12月生于浙江，剑桥大学博士，中国科学技术大学教授。首批基金委优秀青年项目、求是杰出青年学者奖获得者。在光量子信息处理和基于半导体微纳结构的单光子源等领域进行了长期的研究，已发表Rev. Mod. Phys. 1篇，Nature 3篇，Nature Physics 3篇，Nature Nanotechnology 2篇，Nature Photonics 3篇，PNAS 3篇，Phys. Rev. Lett. 11篇，Nano Lett. 2篇：以上期刊论文中有20篇以第一作者或者通讯作者发表；被SCI引用1600余次，第一作者论文单篇引用最高360余次。作为主要作者完成的工作有：在国际上首次实现六光子、八光子和十比特超纠缠，三次刷新纠缠态世界记录；实现单光子多自由度的量子隐形传态、量子分解算法、线性方程组求解、量子机器学习；单自旋的非破坏性测量、基于量子点的高品质单光子源、基于二维单原子层的单光子发射。成果两次入选年度中国科技十大进展新闻。