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Yang Zhenning's achievements are mainly in Physics:
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phase transition theory
statistical mechanics is one of Yang Zhenning's main research directions. His special feature in statistical mechanics is the rigorous solution and analysis of the universal model rooted in physical reality, so as to grasp the essence and essence of the problem. In 1952, 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 completed independently the year before, and the critical exponent of 1 / 8 is obtained. This is the most lengthy calculation Yang Zhenning has ever done. Ising model is the most basic but very important model in statistical mechanics, but its importance in theoretical physics was not widely recognized until the 1960s. In 1952, Yang Zhenning cooperated with Li Zheng to complete and publish two papers on phase transition theory. The two articles were submitted and published at the same time, which aroused Einstein's interest. In this paper, the analytical properties of the giant partition function are studied by the method of analytical continuation. It is found that the distribution of its roots determines the equation of state and phase transition properties, which eliminates the doubt that there may be different thermodynamic phases in 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 with attractive interaction lies on the unit circle in a complex plane
In 1957, Yang Zhenning and his collaborators published or completed a series of papers on the rarefied boson multi-body system. First of all, he published two papers with Huang kesun and Luttinger, and applied the pseudo potential method to this field. During the period of waiting for the experimental results after writing the paper on parity conservation in weak interaction, Yang Zhenning and Li Zheng first obtained the correct ground state energy correction by using the double collision method, and then obtained the same results with Huang kesun and Li Zheng by using the pseudo potential method. The most surprising energy correction they got was the famous square root correction, which could not be verified by experiments at that time. However, with the development of cold atom physics, this correction has been proved experimentally In the 1960s, the attempt to find a model with off diagonal long program led Yang Zhenning to the exact solution of quantum statistical model. In 1967, Yang Zhenning discovered 1-D δ The fermion quantum many body problem in the functional repulsive potential can be transformed into a matrix equation, which is later called Yang Baxter equation (because Baxter also found this equation in another problem in 1972). In 1967, Yang Zhenning also wrote an article published the following year to further explore the S-matrix of this problem. Later, it was found that young Baxter equation is a very important equation in mathematics and physics, which is closely related to kink theory, braid group, Hopf algebra and even string theory. The one-dimensional fermion problem discussed by Yang Zhenning in that year later became very important in the experimental study of cold atoms. The nested bethe hypothesis method he invented in this paper was used by Lieb and Wu fayue to solve the one-dimensional Hubbard model the next year. Hubbard model later became the basis of many theoretical studies of high temperature superconctivity -
1D δ The exact solution of boson in function repulsive potential at finite temperature δ The boson problem in functional repulsive potential is advanced to finite temperature. This is the first quantum statistical model with interaction in history; This model and result have been realized and verified by experiments in cold atomic system
In 1961, through close communication with Fairbank experimental group, Yang Zhenning and Byers theoretically explained the quantization of superconctor flux discovered by the experimental group, proved that electron pairing can lead to the observed phenomenon, and clarified the basic principle of no need to introce new electromagnetic field, The error of London reasoning is corrected. In this work, Yang Zhenning and Byers applied the gauge transformation technique to the condensed matter system. The related physics and methods have been widely used in the research of superconctivity, superfluidity and quantum Hall effect In 1962, Yang Zhenning put forward the concept of "off Di angular long range order" to describe the essence of superfluidity and superconctivity. At the same time, the origin of flux quantization was discussed. This is a key concept in contemporary condensed matter physics. From 1989 to 1990, Yang Zhenning found an eigenstate with off diagonal long program in Hubbard model, which is closely related to high temperature superconctivity, and found its so (4) symmetry with Zhang Shousheng The symmetry is an important embodiment of the beauty of physics and one of the main 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 contributions to particle physics show that he is good at symmetry analysis. He can often accurately use symmetry, get results quickly with elegant methods, and highlight the essence and cleverness. In 1999, at an academic conference in Stony Brook, Yang Zhenning was known as the "Lord of symmetry" In 1950, Yang Zhenning's paper on P 0 decay and his paper with tiomno on P 0 decay β The paper of phase factor in decay established his leading position in this field. In 1956, θ-τ The riddle of parity is the most important problem in particle physics. At that time, whether parity can not be conserved was widely discussed. Yang Zhenning and Li Zheng θ-τ The riddle of physics, a specific physical problem, has come to a more general problem. The possibility of "parity is conserved in strong interaction and electromagnetic interaction, but it may not be conserved in weak interaction" is put forward. The decay process dominated by weak interaction is independent. After specific calculation, it is found that there is no previous experiment to prove whether parity is conserved in weak interaction. They also pointed out several key experiments of weak interaction to test whether parity is conserved in weak interaction. In the summer of 1956, Wu Jianxiong decided to do one of the experiments they pointed out about 60Co β Decay experiments. In January of the next year, the experimental group led by her proved that parity is not conserved in weak interaction, which caused a big shock in the whole physics field. For this work, Yang Zhenning and Li Zheng won the Nobel Prize in physics in 1957 -
time inversion, charge conjugation and parity are three kinds of discrete symmetries.
because the preprint of the paper questioning whether parity is conserved in weak interaction, oehme wrote a letter to Yang Zhenning in August 1956, proposing the relationship among parity (P), charge conjugation (c) and time inversion (T) in weak interaction. This led Yang Zhenning, Li Zheng and oehme to publish paper 57e, discussing the relationship between P, C and t. This paper plays a decisive role in the theoretical analysis of CP nonconservation in 1964
In 1960, Li Zheng and Yang Zhenning theoretically discussed the importance of high energy neutrino experiment in order to get more experimental information of weak interaction. This is the first theoretical analysis of neutrino experiment, which leads to many important research works The phenomenological framework of CP non conservation. Yang Zhenning and Wu Dajun ignored those theoretical conjectures which were divorced from reality, and made a phenomenological analysis of CP non conservation, and established a phenomenological framework for later analysis of this kind of phenomenon. This reflects Yang Zhenning's down-to-earth style, and clearly shows that he is influenced by Fermi Yang mills gauge field theory was published in 1954. This theory, which was not valued by the physics circles at that time, developed into a standard model through the spontaneous symmetry breaking concept introced by many scholars from 1960s to 1970s. This is generally regarded as the total achievement of basic physics in the second half of the 20th century From a mathematical point of view, the paper of Yang Zhenning and mills is a generalization from Abelian gauge field theory to non Abelian gauge field theory. From the physical point of view, it is with this generalization that new basic rules of interaction are developedin the four basic interactions that dominate the world, weak electric interaction and strong interaction are described by young mills theory, and Einstein's general theory of relativity, which describes gravity, is similar to young mills theory. Yang Zhenning called this "symmetrical dominant power". Yang mills theory is a great achievement in physics in the second half of the 20th century. Yang mills equation, Maxwell equation and Einstein equation have a very important historical position
The integral form of gauge field theory Yang mills theory also advances the relationship between physics and mathematics to a new level. Around 1970, Yang Zhenning devoted himself to studying the integral form of gauge field theory, discovered the importance of non integrable phase factor, and realized that gauge field has profound geometric significance Correspondence between gauge field theory and fiber bundle theory. In this paper, a dictionary is attached, which translates the basic concepts of gauge field theory in physics into the basic concepts of fiber bundle theory in mathematics. This dictionary has aroused wide interest in mathematics and greatly promoted the successful cooperation between mathematics and physics in the next few decades
Bozhou to Yongcheng central bus station of Yongcheng Xincheng bus station, the ticket price is 15 yuan, more than an hour to reach
Dancheng to Bozhou takes two and a half hours, the price is 25 yuan
What are Yang Zhenning's main achievements? Can it be compared with Newton and Einstein<
Yang Zhenning won the Nobel Prize in physics as early as 1957 (another Chinese American professor Li Zheng also won the prize)! Professor Yang Zhenning also has many names of his laws, but few people can call them! For example: weak action parity nonconservation, noncommutative gauge field theory, off diagonal long program, simple circle theorem and so on! Yang Zhenning has made a milestone contribution in the fields of particle physics, statistical mechanics and condensed matter physics
besides the Nobel Prize in 1957, he also won the ramford prize in 1980, the National Medal for Science in 1986, the Benjamin Franklin medal in 1993 and the Bauer prize in 1994! Wait, a lot of international awards
some people say that Einstein is a physicist of the first step, while Yang Zhenning is definitely a physicist of the second step! In addition, there are dozens of levels of ladder! In physical research, Professor Yang Zhenning is comparable with Einstein. As for the overall level, it should not be enough to reach the height of Einstein
finally, it is worth mentioning that he was a professor of Tsinghua University in 1998. Resume Chinese nationality in 2017
Yang Zhenning is the first Chinese American scientist to visit China after the loosening of Sino US relations, actively promoting Sino US cultural exchanges and mutual understanding between Chinese and American people
Yang Zhenning is an academician of the Chinese Academy of Sciences, the National Academy of Sciences of the United States, the Academia Sinica of Taiwan, the Russian Academy of Sciences and the Royal Society of the United Kingdom
Yang Zhenning has made a landmark contribution in the fields of particle physics, statistical mechanics and condensed matter physics!
B3 is equivalent to class a A3, but the smelting method is marked, which has been eliminated for a long time.
Yongcheng north station is located in Mangshan Town, Yongcheng City, Henan Province. It is one of the nine stations along the Zhengzhou Xuzhou high-speed railway. The station building area is 5000 square meters, the platform scale is 2 sets and 4 lines (including the main line). It is now a second-class station, 35 km away from the center of Yongcheng city and 3.5 km away from Mangdangshan scenic spot
on the morning of March 4, 2013, the first pile of Yongcheng North Station of Zhengzhou Xuzhou high speed railway, which was constructed by China Railway No.3 Engineering Group Co., Ltd., was officially driven into the ground, marking the formal commencement of construction of Yongcheng North Station of Zhengzhou Xuzhou high speed railway. On September 10, 2016, Yongcheng north station was officially put into operation with the full line of Zhengzhou Xuzhou high-speed railway
the construction of Yongcheng north station will promote Yongcheng city to integrate into the three hour life circle of Central Plains urban agglomeration and Yangtze River Delta urban agglomeration, and shorten the time from Yongcheng north station to Zhengzhou, Jinan, Nanjing, Shanghai, Hangzhou and other big cities to less than four hours. The construction of Zhengzhou Xuzhou high-speed railway and the opening and operation of Yongcheng north station are of great significance to promote the economic and social development and accelerate the reform and opening up of Yongcheng.
For a long time, many people have criticized Yang Zhenning for his disrespect for the old and his admiration for foreign countries. However, his contribution to China can not be ignored. He also made great contributions in physics and China's diplomacy
in 1956, Yang Zhenning and Professor Li Zheng jointly put forward the principle of parity nonconservation in weak interaction, so they won the 1957 Nobel Prize in physics The principle of strong> has completely changed the understanding of symmetry and opened up a new world for people to correctly understand the microscopic particle world. p> At the same time, we should use our own professional knowledge to guide the specific scientific research, plan for the scientific research in our country, and promote the development of physics. None of these contributions can be made by ordinary people
although he came back later, he cultivated a large number of scientific and technological talents for the country and donated millions of dollars to Tsinghua University. It should be said that he is a patriotic scientist and has made outstanding contributions to the world's scientific progress and invention. This is something that many people can't do
