Presentation title: Quantum State Preparation in Coherent Ising machine
Speaker: Zhou Zhengyang Lecturer (Zhejiang Sci-Tech University)
Moderator: Professor Liu Tao
Report time: 16:00 PM, December 16, 2023 (Saturday)
Address: Room 213, 2nd Floor, Physics Building (Building 18) (Academic Lecture Hall)
Welcome teachers and students to attend!
School of Physics and Photonics
December 13, 2023
Report Summary: Combinatorial optimization problems arise frequently in daily life, such as national production planning, traveling salesman problems, and antenna array design. One of the effective ways to solve these problems is to map them to the ground state problem of the Ising model and solve them by using the Ising machine. The coherent Ising machine, as a device for simulating the Ising model, uses laser pulses to simulate the problem solving process. Due to the optical pulse propagation characteristics, the Coherent Issing machine is easier to achieve the interaction between different equivalent spins, and has been able to handle up to 100,000 spins. However, the existing coherent Issing machines mainly operate in the semiclassical parameter interval, and rarely use quantum effects to improve performance or expand application fields. Therefore, considering the introduction of quantum effects becomes a potential way to improve device performance and application direction. However, the introduction of quantum properties requires a comprehensive understanding of the various quantum preparation conditions. This report will first introduce the research status and basic principles of the coherent Ising machine, and then explore the possible directions of quantum expansion. On this basis, we will introduce the research on the preparation conditions of some potential quantum states.
About the speaker: Lecturer, Department of Physics, School of Science, Zhejiang Sci-Tech University. He received his PhD from Fudan University in 2017. After that, he worked as a postdoctoral researcher at Riken, Japan. He will return to China to work in 2022. His research interests include coherent Ising machine, quantum optics and quantum open systems.