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  Hyun-min Kim: Creating a Photonic Chip for Scalable Quantum Information Processing   In the "NExT Forum" held by Hon Hai Research Institute on December 12, Jin Xianmin, founder and CEO of Turing Quantum, professor of Shanghai Jiaotong University (SJTU), and director of the Integrated Quantum Information Technology Center (IQIT), was invited to share his experience in the forum. The team's research results in the field of photonics. Professor Jin Xianmin used to be a research assistant at Oxford University, became a researcher at Madame Curie College and Wolfson College in 2012, and was promoted to a tenured professor at Shanghai Jiaotong University in 2019. His interests cover a broad range of quantum computing, quantum communication, and quantum metrology, with a particular focus on the topic of building large-scale quantum systems by integrating optical components and quantum memories. Jin Xianmin's team is researching optical quantum computing and its corresponding quantum algorithms. He believes that different types of quantum computers have their own advantages and disadvantages, and quantum computers using photons have advantages in qubit connection, scale, fidelity and error correction. There are no obvious disadvantages. Compared with other quantum particles, photons are relatively easy to generate, manipulate, and measure, and can be transported over long distances without coupling to the environment. Kim Hyun-min mentioned that photonic quantum computing can operate at room temperature and scale up with integrated photonic chips. An important step towards quantum acceleration: the photonic chip   The optical quantum chip used by Jin Xianmin's team is made by using a femtosecond laser to directly write a waveguide (waveguid) for photon transmission on the glass. This method does not manufacture wafers step by step, but at one time, so the parameters are the key to determine the performance of the wafer. For four years, the team locked in all the parameters, which can now be freely programmed on the largest 3D photonic wafer yet. The team constructed a large-scale photonic wafer with a 3D structure and conducted 2D quantum experiments, and designed a hexagonal structure wafer. This structure can realize the quantum fast hitting algorithm (quantum fast hitting)* very efficiently. According to Jin Xianmin, this is an important step in realizing quantum acceleration. In addition, compared with the Intel Pentium 4 processor, Jin Xianmin's team also demonstrated the superior computing power of the scalable photonic chip machine, and the application of the photonic chip in quantum simulation, such as the quantum tunneling effect of fractal networks**, etc. Research that is difficult to simulate with traditional computers. Kim Hyun-min's team aims to develop a photonic computer and develop a 3D scale and ultra-high-speed photonic quantum computing chip. The photonic computer will include the algorithm and system of the photonic chip. Currently, the weight of the 3D photonic chip is still too heavy. It is expected that the next generation will greatly reduce the weight and improve the accuracy and number of layers. In the future, it can also be provided to research groups in various fields for specific calculations. law and specific applications. In addition, Jin Xianmin also mentioned some very unique technologies, such as modular photon filters (photonic filter modular), which can not only be applied in quantum computing, but also in materials science, biomedical imaging, and aviation industry, etc. field.  

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