And no matter how other countries are anxious about restarting China's manned space and lunar exploration projects, Xu Chuan is immersed in his own world.

From the perspective of quantum chemistry, the mechanism of strong diamagnetism in KL-66 material is explained.

It has to be said that at a time when the traditional condensed matter theory was losing its effect, quantum theory played an unexpected role at this time.

However, at present, this is just a new road, and Xu Chuan is not sure whether it can be passed.

Late at night, in the Beihai Hotel, Xu Chuan sorted out the manuscript paper on the table, and then got up to wash.

If it was normal times, he would probably continue to stay up for a while and study it.

However, today I have promised that Pan Lao will go to Peking University tomorrow to chat with him, so he simply rests early.

After all, the old man's sleep time is shorter, and the morning should be the time when his old man's energy is better.

The next day, early in the morning.

Xu Chuan got up early in the morning, moved his body, and after eating breakfast, he went to Peking University.

Successfully found the professor's residential area through security, and the old academician Pan Deming was moving in the community.

"Old Pan, good morning." After watching the meeting, Xu Chuan stepped forward and said hello with a smile.

Hearing the voice, the old academician Pan Deming, who was doing Tai Chi, turned his head and looked over, and said with a smile on his face: "Morning, have you had breakfast?" ”

"After eating, how is your recovery?" Xu Chuan smiled and gave the little tea he brought in his hand to the old academician in front of him, and asked with concern.

"Tea?"

Pan Deming took the box curiously, looked at it, sniffed it again, and then said with a smile: "This tea is of good quality, where did you get it?" ”

Xu Chuan smiled and said, "The Great Elder gave it, and I don't know what the specific breed is." Yesterday, when I had a meeting, he asked Qin Qian to bring it to me. Thinking that you don't lack anything to eat and drink when you are old, I borrowed flowers and offered Buddha to bring a box. ”

Hearing this, Old Academician Pan Deming was slightly stunned for a moment, and then said with a smile: "That relationship is a good thing, I'll accept it." ”

Xu Chuan smiled: "As long as Old Pan likes it." ”

Pan Deming smiled and said: "Speaking of tea, I was able to get two boxes of good tea from Qin Qianchang in the first two years, but it may be that I played a lot of autumn wind before, and he hid it and didn't give it to me." ”

"Come on, come on, sit in the house first, have time today, have lunch and then leave?" Have a drink with me at noon? ”

Xu Chuan smiled and said, "You have to pay attention to your body when you are old, drink alcohol or something, let's try to eat as little as possible." ”

Pan Deming smiled while taking Xu Chuan into the room: "Hey, it's rare to be happy, don't say such things." ”

After a slight pause, he continued, "I heard that we are going to build a large strong particle collider?" ”

Xu Chuan nodded and said, "Well, it's indeed a request, the relevant instructions have come down, and there will be a related discussion on the side of Science and Technology next Thursday." ”

Pan Deming smiled, looked at Xu Chuan and said, "It's a good thing, this kind of scientific facility still needs to be built. ”

"It's just that you're busy? It's a manned space project, a collider, and you have to control the Xinghai Research Institute, do you have enough energy? ”

Xu Chuan smiled and said, "It depends on how it is used." ”

After a pause, he continued: "For me, the management side of the work is never the focus, I prefer to lead the team to solve technical problems. ”

"Just like when studying controlled nuclear fusion, the daily management work is basically handled by Peng Hongxi, Peng Lao and Gao Hongming, and I can concentrate on overcoming technical problems."

Pan Deming smiled and said, "You really don't care about these things at all, the position of chief designer and chief person in charge of controlled nuclear fusion will retire as soon as he retires." ”

As he spoke, he looked at Xu Chuan and shook his head with a smile.

To be honest, the position of chief designer and chief person in charge of controlled nuclear fusion, even if it is given to others, may not be able to have the determination to retire directly.

After all, there will be the development of second-generation controllable nuclear fusion and fusion energy companies in the future. As long as he sits in that position, his right to speak is unshakable.

But the young man in front of him, after the successful ignition of the demonstration pile, turned around and left directly, as if he had completed his mission.

Xu Chuan said with a smile: "What I do is actually just what a scholar and a researcher should do." ”

Pan Deming smiled and said curiously: "Speaking of which, do you still have the time and energy to study mathematics?" ”

"Now that you are about to become an applied scholar in various developments in other fields, are you still doing theoretical research?"

Hearing this question, Xu Chuan said with a smile: "Of course, application and theory are parallel tracks, no matter which one is detached, the train of scientific research will be derailed." ”

"In the first two years, I did study less because of controlled fusion engineering, but I still have to pick it up after all."

After a pause, he continued: "Actually, I've been working on some theoretical things recently, but I haven't made much progress so far. ”

Hearing this, Pan Deming looked at him curiously and asked, "Which one?" Mathematics or Physics? ”

"It's both, mainly in terms of strongly correlated electronic systems."

Xu Chuan replied with a smile: "When I was researching the KL-66 materials in South Korea before, I made an unexpected discovery, and I am trying to see if I can explain it through mathematics." ”

"If it can be successful, the theory of strongly correlated electronic systems should be able to make a breakthrough, but it is still being explored, and it is not easy to break through."

For the old academician in front of him, he didn't mind revealing the direction and scope of his research.

After all, if even he is unreliable, there will be no credible people in this world.

Hearing this, Pan Deming's expression was a little moved, and he said: "This should be a worldwide problem, and the condensed matter physics community has also studied it for many years." ”

Xu Chuan nodded and said, "Well, you can say that." ”

"In fact, this research is mainly for superconducting materials. Subsequent aerospace engineering and research in the direction of controlled nuclear fusion require superconducting materials with high critical magnetic fields. ”

"If there is a breakthrough in this theory, it may be possible to increase the critical magnetic field of superconducting materials by an order of magnitude."

Pan Deming thought for a while and said, "I don't know much about the strong correlation system, but maybe you can go to Yang Zhenhuan to talk?" His research in condensed matter physics is still very unique. ”

Xu Chuan smiled and said, "Elder Yang will be 100 years old next year, and he will be ninety-nine this year, so it's not appropriate to nag him again." ”

Hearing this, Academician Pan Deming sighed and said: "There are many scholars in China, and there are many who are engaged in mathematics and condensed matter physics, but there are few who can go to the top of the world, otherwise there will be no problem of not being able to find someone to talk to." ”

"Since you, the top academic fault line is too serious. No, it should be said that you have pulled domestic mathematical physics to a whole new level, and this kind of problem has arisen. ”

The two millennial problems can be said to be an unattainable mountain for the mathematical community in China.

The young mathematician of this level in front of him, looking at the entire Huaguo, is now alive, then I am afraid that Mr. Qiu, who has returned from the United States, will be able to enter this field.

Maybe the old Mr. Yang who is engaged in physics can also be counted as half, but he is not a person in the mathematics world after all.

And others, such as Zhang Yitang, the golden generation of Peking University, Li Jun and others in Fudan, are still a distance behind the person in front of them and Mr. Qiu.

Xu Chuan smiled, and was just about to open his mouth to speak, when in the living room, two old men walked in accompanied by a middle-aged woman.

Seeing the visitor, Xu Chuan was stunned for a moment, and there was a hint of surprise in his eyes.

The old man walking in front was Mr. Yang, who was still chatting with Academician Pan just now, and the middle-aged woman beside him was undoubtedly his successor, Ms. Weng, who was carrying a fruit basket in her hand.

And standing a little behind is Mr. Qiu.

These two people came together, which made Xu Chuan a little surprised.

After all, this is Peking University, and Qiu and Yang are both in Shuimu.

Of course, it's not far away, just a street, just a casual stroll to arrive.

In the living room, Old Man Qiu, who was walking a little behind, had a much sharper look, and saw Xu Chuan sitting on the sofa at a glance, and greeted him with a smile: "Yo, Academician Xu, what a coincidence, I didn't expect you to be here?" ”

Hearing this voice, Yang Lao, who was walking in front, squinted his eyes and looked at it before he recognized Xu Chuan.

Xu Chuan got up with a smile and said hello to the two old men: "Old Qiu, Old Yang, I didn't expect to meet the two here." ”

Qiu Chengtong said with a smile: "It's not Pan Deming, an old guy, who has been lying in the hospital for more than a month some time ago, and people are worried." No, after he was discharged from the hospital, I came over with Lao Yang to take a look, but don't let this old guy walk ahead of us. ”

"But looking at him like this today, he should be recovering well."

For Qiu, although he has an incomprehensible relationship with the Department of Mathematics of Peking University, it is another matter, and it does not affect his friendship with Academician Pan.

After all, the two are almost the same generation, and they can be said to have been friends for many years.

Hearing this, Pan Deming immediately blew his beard and glared, and looked over: "You old thing, how do you talk?" I won't leave if you're gone! ”

Qiu Chengtong ignored him, looked at Xu Chuan with a smile, and asked, "Speaking of which, why are you here?" ”

Hearing the sharp 'quarrel' between Qiu Chengtong and Pan Deming, the corners of Xu Chuan's mouth twitched a few times, and he replied: "Didn't Mizuki hold a meeting on the manned space program yesterday, and I came here to attend the meeting." Then he came and sat down. ”

Qiu Chengtong raised his eyebrows and said with a smile: "It seems that you and this old guy have known each other for a long time." ”

Xu Chuan coughed lightly and said, "I have indeed known each other for a while. ”

On the side, Mr. Yang sat down with the support of Ms. Weng and looked Xu Chuan up and down.

This is the first time the two have met, and they haven't seen each other before.

After all, when Xu Chuan came back in 18 years, he was already 96 years old and had already retired.

But the two of them must know each other, at least they know each other.

After staring at Xu Chuan for a while, Mr. Yang sighed, "The first time I heard your name, it was from astronomy. ”

"If I'm not mistaken, it seems like 15 years. At that time, your observations and calculations of Betelgeuse shocked the entire astronomical and astrophysical community. ”

"I didn't expect that only three years later, you won the Nobel Prize in Physics, and you also solved the controllable nuclear fusion technology, which is terrifying."

Xu Chuan said with a smile: "I've always wanted to visit you, but I'm too busy with work to find time." ”

Mr. Yang waved his hand and said, "I originally planned to talk to you at the collider seminar in a week, but I didn't expect to meet in advance today, and it can be regarded as fate." ”

After a slight pause, he glanced at Xu Chuan and asked curiously, "How are you doing research on inert neutrinos and dark matter?" ”

Xu Chuan thought for a moment and said: "This research can only be said to have directions and ideas, and the specific situation has to be checked and analyzed by doing experiments on the collider. ”

"Are you sure?" Mr. Yang asked.

Xu Chuan smiled and said, "Engaging in research and research, before the dust settles, no one dares to say that they are 100% sure that they will do it." ”

After a pause, he looked at Academician Yang and said with a smile: "But there must be a little bit of a grasp, but I don't know how many problems I will encounter in the middle." ”

Hearing this, Mr. Yang stared at him for a long time, and was silent for a long time before he spoke: "In the past few decades, whenever the country has discussed the construction of a large strong particle collider, I have openly stood up and written articles against it, and it has directly delayed the process of building the collider. ”

"I don't think it's worth spending $200 billion to build a collider, after all, we're still in the process of developing and there are more places where we need money."

"And we don't have a high level of physics talent, not even the percent of the world's physics researchers, and even if the collider is built, how many of us will be able to make the most of it?"

"Including 16 years, even if the country has the ability to build it, I still think it is a project that costs people and money."

"For this reason, I almost fell out with the entire field of physics in China."

"I know my peers are unhappy with me and say I'm going to shut them down. But this collider will cost 200 billion, and the follow-up will be even more, I don't think I can accept it. ”

Hearing this, Xu Chuan smiled and asked, "So today Yang always wants to persuade me to take a break?" ”

He knew that he had always been opposed to the construction of the collider, but he didn't expect that when they met for the first time today, this old gentleman seemed to want to convince him?