Huazhong University of Science and Technology has achieved major breakthroughs in the field of quantum computing

Wuhan Evening News August 4th (Reporter Wang Yang Correspondent Wang Xiaoxiao) The reporter from the Yangtze River Daily learned from Huazhong University of Science and Technology that recently, "Nature Communications" magazine published an important research results of Professor Li Lin, a research team of the School of Physics at the School of Physics at the School of Physics, For the first time, the purity and fullness of the Rodberg's single light source were increased at the same time to more than 99.9%at the same time, and using the single light source to realize the internationally highest -fidelity authentic light quantum logic door. The results of this research are expected to open up new prospects for the processing of optical quantum information and distributed optical quantum systems.

Single -optic source preparation and quantum logic door experimental schematic diagram.

Single -optical source is one of the core quantum resources required by quantum information and precision measurement research. Many important quantum optical applications have high requirements for the quality of single light. For example, in order to meet applications such as full -optical quantum recuvals and cluster optical quantum computing, the purity of single light must reach more than 99.9%, and the same degree is greater than the same degree than the same degree than the same degree than the same degree. 99%. In the past few decades, people have developed different physical systems to produce single photon. Although the quality of single photons has been greatly improved, it is still a big problem to achieve a single optical source source that meets high purity and high -profile similarities at the same time.

Light quantum logic door concept diagram.

Professor Li Lin of Huazhong University of Science and Technology has been committed to developing quantum information processing and precision measurement techniques based on the Rideborg atom. After several years of hard work, the quantum physics experiment platform based on the Reedburg atom was successfully established.

Reidelberg quantum optical experimental device.

The research team also conducted an important single -optical sub -source application research: optical quantum logic door. The quantum logic doors are the core unit of important applications such as quantum computing, and its preservation directly affects the scalability of the quantum system. In this study, Professor Li Lin's research team used high -quality Ridgeberg single -light sub -source to show the nearly perfect twin photon quantum interference, applied it to the KLM -based optical quantum logic door experiment, and successfully successfully reached the real value. Table preservation was increased to 99.84%.

The light quantum logic door using the high -fidelity trueness, the research team further demonstrated the establishment of quantum entanglement between two unrelated single light, and the quantum entanglement measurement was performed through quantum layer analysis and Bell irregularities. The degree reached 99.69%. Compared with the previous experimental results of similar experiments, this study reduced the error (distortion) of the optical quantum logic door by one or more.

According to reports, quantum computers are expected to show extremely powerful computing speed and information processing functions on the problems such as finding, new materials design, and macromolecular trait simulation such as macromolecular traits. Similar to the importance of classic logic doors in electronic computers, quantum logic doors are one of the core components necessary for building quantum computers.

Shi Shuai, doctoral student Xu Biao, doctoral student Xu Biao, Dr. Ye Genzheng, and Associate Professor Zhang Kuan of the School of Physics of Huazhong University of Science and Technology were the first authors of the work. Professor Li Lin and Associate Professor Su Jiaoqin were the author of the joint communication, and Huazhong University of Science and Technology was the first unit. The work was supported by the National Key R & D Plan of the Ministry of Science and Technology, the National Natural Science Foundation of China, and the National Natural Science and Technology University of Science and Technology's precision gravity measurement to measure major national science and technology infrastructure.

[Edit: Yu Lina]

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