2020-11-20

New breakthroughs in quantum computing and quantum simulation research in my country

By yqqlm yqqlm

Central Broadcasting Network, Beijing, November 19 (Reporter Zhu Min) According to a report by the Voice of China National News Network of China Central Radio and Television, recently, the University of Science and Technology of China Pan Jianwei, Yuan Zhensheng and others cooperated with German and Italian scientists to make new progress in ultra-cold atom quantum computing and simulation research, and for the first time to use microscopic quantum control methods to verify in quantum multi-body systems The Gauss theorem. In the early morning of the 19th Beijing time, the internationally renowned academic journal”Nature” published the results.

Quantum electrodynamics and standard model describing the interaction of elementary particles are all gauge field theories that satisfy the symmetry of a particular group. However, scientists found that the computational complexity of solving various gauge field equations was very high, and proposed the development of a dedicated quantum computer-a quantum simulator-to build a lattice gauge field model. However, there has been little progress in the development of this model. The research team composed of Pan Jianwei, Yuan Zhensheng and others has developed a dedicated quantum computer-a 71-dot ultra-cold atomic optical lattice quantum simulator, which successfully simulated the Schwinger model of the quantum electrodynamic equation. Professor Yuan Zhensheng of the University of Science and Technology of China introduced:“In fact, we have built a quantum many-body model that is very similar and very close to the complex physical system we are going to study. Based on this quantum many-body model, we can accurately Adjusting some of the known parameters in this model, such as the strength of the interaction between these particles, the distance between these particles or how these particles are distributed, we can precisely control these. After we precisely control it, we can observe it. , Using some imaging methods, such as taking a photo to see what the phenomenon is at this time, these directly obtained measurement results are the nature of the target to be studied.”

Yuan Zhensheng pointed out that through manipulation Among them, the ultra-cold atom, the model uses microscopic quantum control methods to verify the Gauss theorem describing the relationship between charge and electric field in a quantum multi-body system for the first time. A breakthrough has been made in the use of large-scale quantum simulators to solve complex physics problems. Yuan Zhensheng said:“For the first time, we simulated the high-energy physicswith a 71-dot quantum multibody quantum simulator with a high enough complexity. /span>The one-dimensional quantum electrodynamics equation inside. After doing this, we may make it into a more complex system in the next step, for example, to simulate a two-dimensional system. This is for us to use the method of quantum simulation to study Complex physics issues provide new capabilities.”