Rebirth of science and technology academic master

Qin Yuanqing was not wearing a suit. Although wearing a suit would look formal, he felt that the suit was too restrictive.

So at this report meeting, Qin Yuanqing was wearing simple casual clothes, jeans and a plaid shirt. He looked young and energetic. He did not look like the head of a world-famous school, but more like a young CEO of an IT company. Product launch site.

Some school leaders also advised Qin Yuanqing that it would be better to wear a suit. After all, this academic conference is very important. It includes well-known scholars from all over the world, and the media coming are also international heavyweight media. It is not good to wear such casual clothes, which will affect Shuimu's image. It will also affect China's image.

But who is Qin Yuanqing? Qin Yuanqing is a post-90s generation. One of the labels of the post-90s generation is personality. He feels that the focus of the report meeting is not his dress, but that he is the speaker and the importance of the content of the report.

Otherwise, if it were someone else, even if he told the outside world that he was going to give a report and how important the report was, no one would listen to his report.

"Dear guests and science enthusiasts, hello everyone, I am Qin Yuanqing, who is giving today's report!" Qin Yuanqing is used to such scenes. After all, the specifications of each of his report meetings are not much smaller. For such a scene Already adapted.

"Last month, I finally completed important research on string theory, which led to a historic breakthrough in string theory. In view of the importance of the results, the content involved was relatively difficult, so I thought twice about publishing it in a professional magazine. paper, but directly hold a report meeting. After the report meeting, everyone present will receive a copy of "Journal of Shuimu University (Natural Science Edition)"

Special issue, this special issue will publish the papers of my academic report. "Qin Yuanqing said with a smile.

During this period of time between Qin, Yuan and Qing Dynasties, a total of three papers were compiled, each of which was heavyweight, enough for "Journal of Shuimu University (Natural Science Edition)" to publish a special issue.

The scholars present were all excited. It’s good to have a paper. Even if there are some parts of the report that you don’t understand, you can still study the paper.

Although it is a bit regretful that I did not get the paper before the report meeting, but times are different now. After listening to the report meeting and reading the paper, if you still don’t understand something, you can also watch the video of this report meeting again.

This is the convenience brought by technological development!

In the early years, scholars wrote their papers one stroke at a time, and the lectures were boring, with just a few blackboards, and they were just like attending class. However, modern scholars, especially those born after the 1980s, are more willing to choose multimedia formats to conduct academic lectures, and combine PPT to explain to everyone, so that everyone can understand and understand it more easily.

As a standard post-90s generation, Qin Yuanqing is no exception. He also likes to use modern tools to conduct academic reports, and the PPTs he produces are quite exquisite.

Among all the scholars, Qin Yuanqing's ppt was the most exquisite. I don't know how many professors praised it as a classic to educate their students.

"You may know that Professor Witten joined the Mizuki Institute of Advanced Studies because he and I join forces to promote the development of string theory. After all, string theory has almost stagnated in the past thirty years, which is undoubtedly frustrating. "." Qin Yuanqing said: "After Professor Witten joined the Mizuki Institute of Advanced Studies, many results in the field of string theory were produced during this period. He modified, revised, and improved the previous research results related to string theory, making string theory usher in a new era. A big development.”

There was a burst of warm applause in the lecture hall, which was an affirmation of the development of string theory in the physics community during this period. After all, these results are obvious to all, and they are indeed much better than before.

As professionals, they understand better than anyone else how difficult it is to form and improve theoretical physics. This process is slow and takes hundreds of years.

For example, Yang-Mills theory, after more than half a century, was finally given the final say by Qin Yuanqing, which means that this theory is truly mature and complete, and it has been perfectly solved from a mathematical perspective, making it able to withstand the test of time. test.

Qin Yuanqing reported in Chinese throughout the lecture, while his students translated in English. After all, most overseas scholars only understand English but not Chinese.

Although many scholars have begun to learn Chinese, this has to be a process.

Therefore, Qin Yuanqing's report speed is not fast, just to enable his students to translate accurately and quickly.

Qin Yuanqing operated the page-turning pen in his hand, and the first page of the PPT projected on the big screen was particularly cool.

The background is a deep black universe, and a blue planet in the starry sky is particularly eye-catching. This is the earth.

Through embedded animation processing, a U-shaped magnet appears where the earth should have appeared.

The magnet continuously absorbs paper clips from the earth. What physical phenomenon or theory does this scene illustrate?

This is Qin Yuanqing's skill in making PPT, which is completely different from other scholars.

The main energy of scholars is to study various knowledge. They will not spend too much time on PPT expression, typesetting, art and other work. Based on a report topic, scholars can explain clearly what needs to be explained.

Therefore, people often complain about the PPT made by some professors. Every page is full of text, and the screen is filled with text. Although the professor has displayed all the content that should be displayed, the students' eyes are dazzled and their brains are swollen.

Qin Yuanqing said with a smile: "Human beings have known the existence of gravity and electromagnetic force for a long time, and based on this, they created the classic theory of gravity and electromagnetic force. Here, we would like to pay tribute to Newton and other physicists, who contributed to Physics has made outstanding contributions!”

"Later, during their research, physicists discovered that in addition to gravity and electromagnetic force, there are two other forces in nature, namely the strong force and the weak force. The strong force causes quarks to attract each other, giving protons and neutral forces The force of particles. The weak force is the force generated by the radiation of atomic nuclei." Qin Yuanqing said: "Looking at this PPT again, we used a slightly exaggerated expression to illustrate an everyday example, putting a magnet close to an iron paper clip. The result is clear at a glance, the paper clip is sucked away by the magnet. This simple experiment shows that the gravitational force exerted on the paper clip by the earth with a mass of 6 times 10 24 kilograms is weaker than the magnetic force exerted by a U-shaped magnet weighing only a few tens of grams. So it is very Obviously, the electromagnetic force is greater than the gravitational force."

"Standing on the earth, we find that gravity is the weakest of the four forces. It is weaker than the electromagnetic force and even weaker than the weak force. Therefore, in some knowledge points in the study career, questions often appear. In this way, we ignore the influence of gravity." Qin Yuanqing said: "However, when we rushed out of the earth and entered the sea of ​​stars, we discovered that gravity cannot be ignored."

"Through what I just discussed, I basically introduced the four basic forces of physics. You may be confused. Today's academic report is obviously an academic report on string theory. How can it talk about the four basic forces?" Qin Yuan He smiled calmly and said: "Okay, then let us discuss in detail the role of the four basic forces in string theory and M-theory, and whether it is possible for the improved M-theory to unify it at some level. One or four basic forces?”

When Qin Yuanqing said this, all the scholars in the lecture hall were shocked. They knew that the topic was coming. They all wanted to know what kind of results Qin Yuanqing had made. He actually held a special academic lecture meeting, and they had already discussed it with him. People from the Shuimu Institute of Advanced Studies discussed it, but found out that Qin Yuanqing told Witten and the others that if they didn't listen to the academic lecture, they wouldn't understand him no matter what he said.

Is this what people say?

You must know that Witten is the flagship figure of string theory, and the dozens of string theory physicists at the Mizuki Institute of Advanced Studies are all internationally famous.

Although they complained about the lack of culture among young people in Qin, Yuan and Qing Dynasties, this aroused their curiosity even more.

"According to Einstein's general theory of relativity, space and time expand and contract under the action of gravity. Then, if the calculation method of quantum mechanics is forcibly applied to the general theory of relativity, there will be infinities that cannot be handled by the renormalization method." Qin Yuanqing The operating pen in his hand moved, and the PPT was suddenly switched, with two formulas appearing on it.

"Having said all that, we will also welcome the protagonists of our report, string theory, superstring theory and M theory!" Qin Yuanqing seemed calm and unhurried.

Because the morning academic lecture lasted a full three hours and there was no question-and-answer session, Qin Yuanqing explained patiently and seemed calm and unhurried.

"The core idea of ​​string theory is that the elementary particles are not points, but strings with a one-dimensional space-extended vibrating structure. We can think of open strings as spaghetti and closed strings as macaroni."

"So, now we answer the question just now, that is, strings can eliminate infinity. In addition, closed strings transmit gravity. The theoretical basis is as shown in the figure. When closed strings vibrate and transmit in this way, they will become gravitons that transmit gravity. This is the gravity It combines the theory of gravity with the theory of quantum mechanics to predict gravitational waves. Gravitational waves have been confirmed. More than a thousand top scientists spent four months analyzing them. This project gave birth to the Nobel Prize Winner of the Physics Prize." At this point, photos of the grand event from 2 years ago appeared on the PPT.

LIGO detected the first gravitational wave signal on September 14, 2015, and in the early morning of June 16, 2016, LIGO announced that two gravitational wave detectors located in the Hanford District of the United States and Livingston, Louisiana A gravitational wave signal was also detected. Just last year, scientists from many countries around the world held a press conference simultaneously, announcing that for the first time humans had directly detected gravitational waves from the merger of double neutron stars, and at the same time "saw" the electromagnetic signal emitted by this spectacular cosmic event.

It can be said that the physicists present still have deep memories of what happened not long ago.

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