Exact solution of boson in the repulsive potential of 1 and 1 dimensional δ function at finite temperature.

In 1969, Yang Zhenning and Yang Zhenping pushed the boson problem in the repulsive potential of 1 dimensional δ function to a finite temperature. This is the first time in history that a quantum statistical model of interaction is obtained at a finite temperature (T >). This model and results were later realized and verified by experiments in the cold atomic system.

2. Theoretical explanation of superconducting magnetic ionization.

196 1 year, through close communication with Fei Zhengqing experimental group, Yang Zhenning and byers theoretically explained the superconducting magnetic ionization discovered by the experimental group, proved that electron pairing can lead to observed phenomena, clarified the basic principle of electromagnetic field without introducing new principles, and corrected the mistakes of London reasoning.

In this work, Yang Zhenning and byers applied gauge transformation technique to condensed matter system. Related physics and methods were later widely used in the study of superconductivity, superfluidity and quantum Hall effect.

3. Parity is not conserved in weak interaction.

Symmetry is an important embodiment of the beauty of physics, and it is also one of the themes of theoretical physics in the 20th century. From classical physics and crystal structure to quantum mechanics and particle physics, symmetry analysis is a powerful tool in physics. Yang Zhenning's many contributions to particle physics show that he is good at symmetry analysis.

He can often use symmetry accurately, get results quickly with elegant methods, and highlight the essence and ingenuity. 1999, Yang Zhenning was called "the king of symmetry" at an academic conference in Brook, Si Tong.

4. Phase transition theory

Statistical mechanics is one of the main research directions of Yang Zhenning. His characteristic in statistical mechanics is to strictly solve and analyze the general model rooted in physical reality, so as to grasp the essence and essence of the problem. From 65438 to 0952, Yang Zhenning and his collaborators published three important papers on phase transition.

The first paper is about the spontaneous magnetization of two-dimensional Ising model, which he independently completed the year before last, and obtained the critical exponent of 1/8. This is the longest calculation that Yang Zhenning has ever done. Ising model is the most basic but extremely important model in statistical mechanics, but its importance in theoretical physics was not widely recognized until 1960s.

1952, Yang Zhenning also cooperated with Li Zhengdao to complete and publish two papers on phase transition theory. Two articles were submitted and published at the same time, which aroused Einstein's interest. In this paper, the analytic properties of giant partition function are studied by analytic continuation method, and it is found that the distribution of its roots determines the state equation and phase transition properties, which eliminates the suspicion that different thermodynamic phases can exist under the same interaction.

The climax of these two papers is the unit circle theorem in the second paper, which points out that the zero point of the giant partition function of the lattice gas model attracting interaction lies on the unit circle on the complex plane.

Second, the thesis works

1, Thesis: About 300 articles have been published in Physical Review and Physical Review Newsletter.

2. Works:

Selected Papers and Remarks 1945- 1980 (in English)

Collected Works of Yang Zhenning (Chinese) and Twilight Collection (Chinese)

On May 20 18, Yang Zhenning and his wife Weng Fan published the scientific paper Dawn Collection. ?

In addition, there are Query on the Conservation of Parity in Weak Interaction, A Brief History of the Discovery of Fundamental Particles, Forty Years of Reading and Teaching, Science, Education and China Modernization, the Character of Science, Science and Technology in the New Century, Physics in the 20th Century, Symmetry and Physics, etc.

Extended data:

Personality assessment

1. As the first Nobel Prize winner in China, Yang Zhenning has always been respected in China's political and academic circles.

Yang Zhenning's extraordinary appreciation of mathematics is reflected in all his works. This makes his less important works become a fine work of art, and his profound thinking becomes a masterpiece. This enabled him to see the mysterious structure of nature more deeply than others.

Yang Zhenning is a man with a mathematical mind. However, due to his early education, he was very interested in the details of the experiment. He likes talking with experimenters and appreciates beautiful experiments very much.

4. The writer Jiang: 1957 won the Nobel Prize in Physics, which is a symbolic event for China people. China has always considered itself a great power in China. However, the Opium War in 1840 was defeated by western countries, and it never recovered and lost confidence.

Yang Zhenning's award, as he himself said, is "helping to change China people's inferiority complex", which not only influenced many young students to devote themselves to physics, but also had a far-reaching impact on China people's academic culture.

References:

Baidu Encyclopedia-Yang Zhenning