The critical magnetic field strength of 40T+ is enough to prove that it is the right way to introduce the strong diamagnetic mechanism into superconducting materials to enhance the magnetic field strength of superconductors.

For Xu Chuan, the breakthrough of improved superconducting materials is not only a big step forward in superconducting materials, but also the hope of small controllable nuclear fusion and aerospace engines.

It's not that he doesn't have more advanced room-temperature superconductor materials in his hands, but in fact, it's not just the critical temperature of superconducting materials that affects the development of technology.

For superconducting materials, whether it is the critical temperature, the critical magnetic field, or the critical current and current density, all affect the application range of superconductors.

For small controlled fusion technologies and aerospace engines, and even large strong particle colliders, these technologies are relatively more focused on the strength of the magnetic field formed by superconductors.

Because only with a high magnetic field strength can the violent high-temperature plasma be more effectively restrained, and a stronger accelerating magnetic field can be provided.

This is also the reason why Xu Chuan has been studying how to improve the critical magnetic field of superconducting materials.

The room temperature superconductor in his hand is not advantageous in this regard, and he needs a superconducting material with a higher magnetic field strength to complete the magnetic field confinement and magnetic field acceleration.

Fortunately, because of an oolong of 'room temperature superconductors', he found this way.

Although the process has gone through several twists and turns, a superconductor with a magnetic field as strong as 40T has finally appeared in his hands.

After handing over the remaining tests for the improved superconductor to the Chuanhai Materials Research Institute, Xu Chuan returned to the villa at the foot of the Purple Mountain, washed up briefly, and then collapsed directly on the bed.

Stick to the bed and sleep, that's his current state.

Although there is still a report meeting tomorrow, he should familiarize himself with the paper or something tonight and make some preparations. But this will have been staying up for several days in a row, and if you don't take a good rest, even your iron body can't bear it.

The next day, Jinling, Nanda.

Physicists and materials scientists from all over the world have entered this ancient campus.

There are big red banners hanging everywhere, such as "Warmly Celebrate the Convening of the Great Unified Framework Report on Strongly Connected Electronic Systems" and "The Holy Grail of Physics, the Crown of Condensed Matter Physics" and other banners are hung at the gate of NTU and on the campus road.

Although it is not the first time that NTU has held such a grand event, this kind of world-class conference will only be expected to benefit any university or institution.

After all, this kind of conference to show the image of the international community not only enhances the academic influence and honor of the university, but also the political achievements of the university and even the entire Jinling City.

In the morning, close to 8 o'clock, physicists and materials scientists from all over the world passed through strict security checks, walked into the campus of NTU, and walked towards the auditorium.

At the school gate, Witten, who was wearing a woolen sweater and a pair of round-framed glasses, handed the invitation in his hand to the doorman, and walked into the campus after passing the inspection.

Behind him, David Gross, whose hairline was already half bald, followed him through the security check.

Walking quickly to Witten's side, Gross curiously glanced at the tight security behind him, and asked Witten, "Is the inspection here so strict?" How it feels completely different from before. ”

Although he doesn't come to China often, he has also come to China to attend some reports and meetings, and he feels that this time the security is completely different from before, and it is very strict.

Witten: "It has something to do with Xu Chuan, and the report meeting he led is basically this procedure, probably to prevent any accidents at the meeting." ”

It's not the first time he's attended this student's report meeting, not long ago there was a math seminar in the capital, and the security specifications are similar to this.

Gross: "That's an exaggeration, even the knife on the keychain has been taken away." ”

He had a tool knife on his keychain, less than three centimeters in total, similar to an ornament, but was taken away when he was told that it was forbidden to carry it when he passed through security.

Witten shrugged his shoulders and said, "Don't worry, when you leave, they will arrange for someone to take the initiative to return it to you, even if you don't remember, you don't have to worry about leaving it here." ”

He wasn't too surprised by this level of security, and although he was a little surprised at first, it made sense to think of what his student had accomplished.

The two of them came to the auditorium where the report meeting was held, and there were many people who arrived earlier than them, and the black figures and the sound of discussion in the auditorium merged.

Weaving through the crowd, Witten found his seat and sat down.

Sitting next to him was another leading physicist, Michael Kosterlitz.

Michael Kosterlitz was awarded the Nobel Prize in 2016 for his discovery of topological phase transitions and topological phases of matter.

Witten didn't have a surprised expression, smiled and said hello to him before sitting down.

"Witten, did you see him yesterday? He doesn't look like he's in this school? After a few words, Michael Kosterlitz looked at Edward Witten and asked.

He arrived here yesterday, but he didn't find Xu Chuan on the campus of NTU, and no one answered his phone calls, which made him regret it.

Originally, he wanted to talk to Xu Chuan about the basis of the strong correlation system and the topological state of matter, but he didn't find anyone.

Shaking his head, Witten said, "No, I also messaged him yesterday and didn't receive a reply. ”

After a slight pause, he continued: "But you can definitely see him at the report meeting today, he is always punctual." ”

Kosterlitz: "Then we'll wait until the briefing is over." By the way, I heard that CERN seems to have changed quite a bit? ”

Witten nodded and said, "CERN is discussing canceling the construction of the LC-LHC high-brightness collider. Of course, it hasn't been decided yet. ”

Hearing this, Kosterlitz looked at him in surprise and asked, "Why cancel, isn't physics developing?" ”

Although he is not a scholar in the field of high-energy physics, he is aware of the importance of the Large Hadron Collider to physics.

Witten: "Huaguo is going to take over this work, they are going to build a hadron collider with a higher energy level, and they are currently talking about cooperation with CERN directors. ”

Kosterlitz: "But shouldn't this kind of thing be in your own hands? This is a collider, a necessary scientific research equipment for the development of basic science. ”

"In addition, if Huaguo takes control of the collider, will it be possible that we will all come to Huaguo to do research in the future?

Witten smiled and said, "Is there anything bad?" ”

Costley shook his head, he always felt that by doing so, he was giving up the development of basic science, at least in the fields of high-energy physics and particle physics.

In fact, he is not alone.

There is also a lot of debate within the CERN Board of Directors about whether to continue the construction of high-brightness LHCs and the Future Cycle Collider (FCC).

Some are for it, some are against.

Those who support it feel that Huaguo has decided to build a hadron collider with a capacity of 100Tev, and even if the LHC is upgraded to become an LC-LHC high-brightness collider, it has no competitive advantage, so it is better to give up altogether.

In particular, there are many people who think that since Huaguo wants to take over this work, it is better to let them take over, and it is just right to divert the funds and use them in other aspects.

In any case, the achievements in the field of high-energy physics are basically fully disclosed. And Hua Guo didn't try to eat alone, and invited them to participate.

If they need it in the future, they can build another one, anyway, they have the technology, what are they afraid of.

The opposition is that they must take the LHC, a basic scientific research equipment, into their own hands, and that the importance of basic science is undoubted, and that it can lead the development of science and technology.

If we do not take the initiative in basic science, I am afraid that the dominant situation in the future of scientific and technological development will change completely.

For this reason, CERN has held many meetings, but each time it has been fruitless.

Witten wasn't interested in getting involved in these things, and it probably wouldn't affect him whether or not CERN continued to build a high-brightness LC-LHC.

On the one hand, the string theory he studied was not something that could be discovered in this century at all.

On the other hand, China has a back-up on its side, and in any case, China will not refuse a top physicist to participate in research, and will treat every participating country and physicist fairly and justly.

This was what his student had personally assured him.

Time passed in the discussion of the crowd, and at nine o'clock, Xu Chuan, who was wearing a formal suit, walked smoothly to the front of the auditorium.

Standing on the report platform and looking around at the audience that had quickly quieted down, Xu Chuan's mood was exceptionally calm.

He was not thrilled by today's report.

The results that should have been made have been made, although the paper has not yet been submitted to the journal for review, but the corresponding results, he has actually gotten it.

The improved superconductor with 40T is the best proof of his results.

Stretching out his hand to straighten the microphone, Xu Chuan briefly tried whether the microphone was normal, and then said in a calm and clear voice.

"First of all, I would like to welcome all of you who came to participate in the exchange report, and I am very grateful to all of you for taking time out of your busy schedules to come here to listen to my academic presentation."

"Today's presentation, as you can see, is about a unified framework theory of strongly correlated electronic systems."

"I believe that from the publication of the paper to the present, everyone here has already read the paper, so I will not waste time and go directly to the topic."

made a simple opening, and Xu Chuan went straight to the point.

The screen behind him lit up, and the content of today's report was clearly revealed.

"The main difference between a strongly correlated system and a weakly correlated system is the intensity of the electron interaction. In the strongly correlated system, the Coulomb repulsion between electrons cannot be ignored, which leads to the failure of the original applicable band theory. ”

"And in this regard, we have always lacked effective means of calculation and related unified theory."

"Today, I'm going to give a presentation here, and I hope it will give you some inspiration."

Consider the second variable of a bivariate function f(x1,x2) in a complete set of univariate basis functions {φi(x)}i=1^N. Expanding f(x1,x2)=∑^ni=1bi(x1)φ(x2), the coefficient(x1) is a function of the first variable. ”

"The basis function is further expanded to."

Along with Xu Chuan's explanation, in the auditorium, the scholars who listened to the report at the front desk raised their heads and listened carefully.

Including Witten, who had already learned about the full thesis with Xu Chuan before, and Michael Kosterlitz sitting next to him.

Especially the latter, he has a lot of doubts in his heart, and he hopes to be answered at this report meeting.

Qiu Chengtong, who was sitting in the front row and came from Mizuki University, looked at the figure on the stage and suddenly felt a little emotional.

"It's unimaginable."

On the side, after hearing this, Chen Zhengping of Nanjing University asked curiously, "What?" ”

Qiu Chengtong smiled and said, "It's hard to imagine that he can make so many achievements in so many fields at such a young age." ”

Hearing this, Chen Zhengping thought for a while and replied: "If I'm not mistaken, he just celebrated his twenty-fourth birthday during the Chinese New Year last year, and he was twenty-five years old. ”

"Twenty-five?" Hearing this answer, Qiu Chengtong was stunned for a moment, as if he was in thought, and was silent for a while before he spoke:

"At the age of twenty-six, Albert Einstein wrote four papers that shocked the world, establishing himself as the greatest physicist of the 20th century."

"Do you think he has a chance to work the same miracle and become the greatest physicist of the twenty-first century, or even surpass all those who came before him?"

Hearing this question, Chen Zhengping was stunned for a moment, then smiled dumbly and said, "I'm afraid this is not easy." ”

After a slight pause, he continued, "Although I have never denied his talent, it can be said that over the years, he is the most gifted scholar I have ever met. But if you want to surpass everyone else in physics, I'm afraid it will be difficult to achieve. ”

"If he had focused on doing research in physics, I think there would have been a chance."

"But if you look at how many fields he is involved in now, mathematics, physics, astronomy, materials science, computational chemistry, even computer programming modeling, applied science, I am afraid that no one in the world today has a wider range of fields than him."

Qiu Chengtong smiled and said, "I'm quite optimistic about him, this kid may be able to create an unprecedented miracle." ”

"What?"

"Reached the highest level ever in mathematics and physics."

Qiu Chengtong spit out a few words from his mouth, which made Chen Zhengping stunned again, and then shook his head with a dumb smile.

To be honest, none of his former mentors had thought of it that way.

The pinnacle of history, which had to surpass all mathematicians and physicists at the same time.

Seeing Chen Zhengping's head, Qiu Chengtong smiled and said, "Then make a bet, I think he really has hope to do it, and he can even see it in my lifetime." ”

Hearing this, Chen Zhengping was stunned again, Qiu is seventy-three years old this year, even if he can live to be ninety years old, this is enough to live a long life, but it is only seventeen years.

It is undeniable that in mathematics, his student's results are enough for him to compete for a ranking in the history of mathematics, and it may take time to precipitate, but there is hope.

Whether it is algebraic cluster and group mapping tools, or differential construction, they are enough to expand into tools such as calculus and Fourier transforms, as long as he has the heart to promote them.

But in physics, I am afraid that the results he created are far from enough.

Seventeen years, that is to say, Xu Chuan will surpass his predecessors in mathematics and physics before the age of forty-two to reach the peak, which may not be described as difficult.

If this is done, he will be the greatest miracle of the 21st century.

PS: There's another chapter in the evening, the same old one, you may not be able to get out before twelve o'clock.