Professor Pan Jianwei of the University of Science and Technology of China, etc., achieved the world's best single photon source. "Nature-Nanotechnology", a sub-Journal of "Nature" in the United Kingdom, published in a long form. Professor Pan Jianwei and Lu Chaoyang of the University of Science and Technology of China Research work on high quality single photon source. This is the first paper published in the "Nature" series of journals in the field of quantum dot optical quantum control in China. Quantum dots are nanocrystals prepared by molecular beam epitaxy, also known as "artificial atoms", and can provide an ideal single photon source for quantum secret communications and optical quantum computing. Previously, research groups such as the University of California, Stanford University, and the University of Cambridge in the UK have implemented single-photon sources based on non-resonant excited quantum dots. However, due to single-photon emission time jitter and exciton decoherence, etc., photon quality is inevitably degraded, and the photon identity can only reach about 70%, which cannot be further applied to scalable quantum information processing. To develop photon quantum information technology that can be truly practical, one of the key technologies is to achieve deterministic high-quality single photon sources. To this end, Pan Jianwei and Lu Chaoyang of the National Laboratory for Physical Sciences at the Microscale have developed a novel set of quantum dot pulse resonance optical excitation and multiple filtering techniques for the first time in the world, which significantly eliminates the decoherence effect and solves the problem of single photon sources. The two basic issues of certainty and high quality. The signal-to-noise ratio of the single-photon source generated by the experiment exceeds 300: 1, the second-order correlation function is less than 1.5%, and the photon isomorphism is better than 97%. These technical indicators make China's research in this field rank among the forefront of the world, as a scalable optical quantum Computation and the realization of the solid-state quantum network based on spin laid the foundation. Reviewers praised this as a "surprisingly high-quality experiment." Bag Cutting Machine,Glass Coil Pouch Machine,Glass Wool Cutting Machine,Glass Wool Pouch Machine Wuxi Zhengyu Technology Development Co.,Ltd. , https://www.zhengyumachine.com
Professor Pan Jianwei of the University of Science and Technology of China, etc. to achieve the world's best single photon source