Time：December 16 2021, 10:30

Tencent Meeting ID: 971462690  Password: 9357

Title：Photonic Quantum Computing Advantages based on Gaussian Boson Sampling

Host：Mengjun Hu, Assistant Research Scientist, BAQIS

Abstract：Quantum computers have ultra-fast parallel computing capabilities in principle, but are limited by the current level of experimental technology, and building a large-scale fault-tolerant quantum computer with practical value still requires long-term efforts. Therefore, in order to further prove the prospect of quantum computing, we need to prove that dedicated quantum devices can surpass classical supercomputers on specific issues based on existing experimental techniques. This is also known as the advantages of quantum computing. Recently, based on the Gaussian Bose sampling scheme, we have used an optical system to achieve the advantages of optical quantum computing, and used a variety of methods to verify the experimental results. Compared with supercomputers using existing classic algorithms, its sampling rate is 10^24 times faster.  

References：

1：Zhong, H. -S., Li, Y., Li, W., Peng, L. -C., Su, Z. -E., Hu, Y., He, Y. -M., Ding, X., Zhang, W., Li, H., Zhang, L., Wang, Z., You, L., Wang, X. -L., Jiang, X., Li, L., Chen, Y. -A., Liu, N. -L., Lu, C. -Y. & Pan, J. -W. 12-Photon Entanglement and Scalable Scattershot Boson Sampling with Optimal Entangled-Photon Pairs from Parametric Down-Conversion. Physical Review Letters 121, 250505 (2018).

2：Zhong, H. -S., Wang, H., Deng, Y. -hao, Chen, M. -C., Peng, L. -C., Luo, Y. -han, Qin, J., Wu, D., Ding, X., Hu, Y., Hu, P., Yang, X. -Y., Zhang, W. -J., Li, H., Li, Y., Jiang, X., Gan, L., Yang, G., You, L., Wang, Z., Li, L., Le Liu, N. -, Lu, C. -Y. & Pan, J. -W. Quantum computational advantage using photons. Science 8770, 1-9 (2020).

3：Zhong, H. -S., Deng, Y. -hao, Qin, J., Wang, H., Chen, M. -C., Peng, L. -C., Luo, Y. -han, Wu, D., Gong, S. -Q., Su, H., Hu, Y., Hu, P., Yang, X. -Y., Zhang, W. -J., Li, H., Li, Y., Jiang, X., Gan, L., Yang, G., You, L., Wang, Z., Li, L., Liu, N. -L., Renema, J. J., Lu, C. -Y. & Pan, J. -W. Phase-Programmable Gaussian Boson Sampling Using Stimulated Squeezed Light. Physical Review Letters 127, 180502 (2021).

About the Speaker：Hansen Zhong obtained his bachelor's degree in physics from the University of science and technology of China in 2017 and continued to study as a graduate student at the University of Science and Technology of China under the guidance of Professor Chaoyang Lu. As the first author or co first author, Hansen Zhong realized 12 photon entanglement for the first time in the world in 2018, realized high-dimensional teleportation and demonstrated the principle of Gaussian Bose sampling for the first time in the world in 2019, and realized the advantages of optical quantum computing based on Gaussian Bose sampling experiment in 2020, namely " The quantum computer Jiuzhang ", In 2021, continue to upgrade and optimize the performance of Gaussian Bose sampling to further improve the advantages of quantum computing. So far, He have published 19 papers in SCI international journals, including one Science, three physical review letters and one Science Bulletin as the first or co first author