Chapter 496 Another Crown on the Throne of Physics

On the podium, Xu Chuan paused after writing a line of title.

He turned slightly to look at the audience in the auditorium, and said with a hint of apology: "I'm sorry to let you understand this new theory temporarily, but I have the responsibility to fix the defects and errors in the paper."

"As compensation, after today's report, I will stay in Nanjing University for three days. During this period, everyone present can come to me for communication on difficult questions related to this new theory, and I will do my best to answer them for everyone."

"Of course, in the next report, I will try my best to slow down the speed of explanation and make everyone understand as much as possible."

"OK, let's get to the point."

As he said, Xu Chuan turned around and wrote a mathematical formula on the blackboard ：

[H=p/2m+∑qhωaqaq+∑q(VqAqE^iqr+h.c.)]

"I believe you can easily understand the formula I wrote down and know what it means."

"For condensed matter physics, one of the greatest achievements in the 20th century is the theoretical image of single electron bands or Fermi liquids in weak interaction systems, which brings us a new method to study particle physics."

"And the study of strong interaction systems and the establishment of a complete and self-consistent theoretical framework are major challenges in the field of condensed matter physics at present."

"Because the degrees of freedom such as charge, spin, orbit and lattice in the system compete and cooperate with each other, the body The system presents a variety of surprising and amazing new material forms that are difficult to predict in advance, and it is difficult to unify the theory. "

"Among them is the polaron system."

"Polarons are a kind of quasiparticles. The most typical example is the electrons wrapped in phonon clouds in ionic crystals. Generally, they are divided into so-called large polarons and small polarons according to their size. The former is much larger than the lattice spacing, or basically the size of the lattice spacing.

"To fully understand the polaron system, you must..."

At the podium, Xu Chuan slowly opened his mouth and started to explain the most basic polaron system.

There is no way. If you want to fully understand his report today, you must do this.

In the auditorium, Witten looked at Guang stared at the lecture table. When Xu Chuan erased the formula on the blackboard and rewrote the first line of the formula, he could not move his eyes away, for fear of missing any formula or even a punctuation mark.

The worries in his heart before were completely forgotten at this moment.

All he had in his mind at this moment were those lines of beautiful formulas.

For a scholar, the most exciting thing is this.

On the other side, in the corner of the auditorium, Feng Shen, a student from Nanjing University who came with his tutor Chen Zhengping to broaden his horizons, looked at the "senior brother" on the stage with a confused face, and couldn't understand what he was doing on it.

"Professor, Senior Brother Xu, what are you writing? "

After enduring for a long time, the newly enrolled student couldn't help but ask the instructor sitting next to him.

Chen Zhengping ignored him and stared at the blackboard. Like Witten, he was also afraid of missing any details, and he had no intention of answering students' questions.

Because if he didn't do this, he might not be able to keep up with the pace.

Although he was once Xu Chuan's instructor, it must be said that the student he led, let alone mathematics, had already surpassed him in physics, in the fields of condensed matter physics and high-energy physics, which he was good at.

At the same time, sitting in the front row, Professor Stuart Parkin, winner of the Millennium Technology Award, stared at the podium with a dignified look, muttering to himself with a hint of excitement and excitement.

"Does the entropy change caused by the change of lattice carriers originate from the degeneracy effect brought by the carriers? The electron-phonon interaction can actually cause the softening of phonon dispersion at the position of the double Fermi wave vector. So that's it. It's incredible. "

Beside him, another professor in the field of condensed matter said solemnly: "Yes, I never thought that small polarons could be explained in this way. The characteristic peaks of quasiparticles we have been looking for now seem to be in the wrong direction."

On the podium, Xu Chuan was still writing the formula in his hand, explaining the 'typical behavior theory of small polarons in the strong electron-phonon interaction system'.

This is the theory he established in his previous life, although he has not yet studied these things in this life. But for him, forgetting anything is impossible to forget this knowledge.

When the title fell on the blackboard, the theory buried deep in his memory quickly revived.

With his explanation and writing, the little time left in the morning passed little by little. When the time came to twelve o'clock, the teacher in charge of administration at the backstage of Nanjing University found the school leaders with some anxiety and worry.

"President Tan, it seems that it is already twelve o'clock. Do you want to eat first? The people at the hotel have asked several times. "

Looking at the figure who was still reporting on the stage, Tan Shaoyuan thought for a while and said: "You ask the hotel to prepare first. If this is over, serve the food immediately. "

"As for when it will end, it is not certain yet. If it is delayed to a later time, I will find a way. "

"Also, you can arrange for someone to get some small cakes or biscuits and give them to the scholars present to fill their stomachs. "

Although he did not understand, he knew the importance of the content of today's temporarily added report to Xu Chuan.

Whether it is to make up for the shortcomings of the paper or to the perfection of the report, it is crucial.

Of course, more importantly, this is an unparalleled event for the physics community and the scholars here today.

Although it is not a complete strong electric unity, the explanation theory of the strong electric phonon interaction system is still enough to bring physics to a new level.

At this point, Xu Chuan was asked to stop explaining and go eat first. Let alone whether Xu Chuan would agree, even if he agreed, I am afraid that the hundreds of physicists in the auditorium would not agree.

For a scholar, pursuing areas that have never been explored is far more important than eating.

Of course, for NTU, this kind of thing still needs to be considered in many aspects. After all, this conference is aimed at international image.

As a host, you should take good care of the guests who come to attend the meeting.

So Tan Shaoyuan thought about it and decided that if the report was not completed by one o'clock, he would communicate with Professor Xu to see if he could pause for a while.

After all, many of the scholars present are over 70 or even 80 years old. Even if Xu Chuan can withstand such a high-intensity lecture, these older generation experts may not be able to withstand it. .

Fortunately, as it approached one o'clock, Xu Chuan began to finish the work.

".In the static structure of the associated system, that is, as the initial condition for dynamic evolution, its electronic state satisfies the stationary Schrdinger equation, and the two-lattice part is obtained by the system energy minimum condition. The two are coupled together through self-consistency Solve to obtain a stable structure."

"At the same time, the evolution of the antipolar system over time is solved using non-adiabatic dynamics. The motion of the lattice satisfies the classic Newtonian equation of motion: Mü, (t)=- K[2u, (t)- Un+ 1(t)- Un-1(t)]+2a[Pm.n+!(t)-Pn-1.n(t)]+I el E(t)[pn.m(1)- 1]”

On the report stage, Xu Chuan tried his best to sort out and simplify the core of the framework in the final steps, so that the audience in the audience could understand his thinking as much as possible.

At the reporting table, when he heard this step, Edward Witten, who had been sitting upright and supporting his body, finally relaxed and leaned on the soft back of the chair, with a smile on his face.

"Another miracle, it's simply unimaginable how he did it."

Beside him, Nobel Prize winner Professor Michael Kosterlitz stared at the blackboard on the stage for a while, and then spoke softly, as if in response or talking to himself: "Is this possible? Was he already prepared?"

"Um?"

After coming back to his senses, Kosterlitz smiled and said: "It's just like a magic show. The flaws and details that we can see are deliberately made by the magician for the audience to see."

"And when we tried to expose this flaw and try to deny his performance, we discovered that everything was under the control of the magician. The so-called flaw was just that he deliberately let us do it for the nature of the performance. something to see.”

After a slight pause, he continued: "After all, it is hard for me to believe that someone could complete a transcendent problem in such a short period of time and at the scene of such a report meeting without preparation in advance."

"Based on the time-dependent Schrdinger equation and Newton's equation of motion, in a strongly correlated system, the ground state is not the scattering of electron polarons and hole polarons in the degenerate polymer, but the scattering of electron polarons and hole polarons in Under the action of the electric field, the polymer chains move toward each other, and the system finally forms a neutral exciton state. "

"Due to the competition between the electric field force and the electroacoustic coupling, the excitons formed exhibit a phenomenon of forward and reverse polarization oscillation, and the system eventually reaches a dynamic equilibrium."

"This theory can provide a reasonable explanation for the typical behavior of small polarons in strong electron-phonon interaction systems."

"That's it for the additional report. I believe that with the knowledge of everyone here, it is not difficult to understand this theory."

"The theory of the typical behavior of small polarons in strong electron-phonon interaction systems is a very interesting problem. It is part of the strong interaction and the unified theory of strong electricity."

"In the coming time, I hope it can serve as a catalyst in the fields of strong electric unified theory and strong interaction, so that more people can see it and invest in these fields."

As he spoke, Xu Chuan looked at Professor David Gross and continued: "Of course, now, it should be enough to answer Professor Gross's question."

Off the stage, David Gross caught Xu Chuan's gaze, and then moved his gaze to the blackboards on the reporting table. The dense formulas on them had already completely conquered him.

After getting the answer from Gross's eyes, Xu Chuan took a deep breath and continued:

"The above is all the contents of the additional report. In the next three days at NTU, I will do my best to answer the questions raised by this new theory until there are no more questions."

"Thank you for your patience. The afternoon report will continue with the Q&A session. As for now, please move to the restaurant to eat. After all, it is getting late."

After saying that, he bowed slightly towards the auditorium to express his gratitude.

And at this moment, in the auditorium, there was a flood of applause, one after another like a wave, lasting for a long time.

Even though Xu Chuan had left the reporting table and could not see his back, the applause still continued.

For everyone sitting here today, this is a miracle of physics that shocks them like never before.

No one expected to witness the breakthrough in the unified theory of strong interaction and strong electricity here.

It is even more likely to be a temporary idea and a temporary interpretation.

Of course, more people are more willing to believe that the relevant theories have been perfected long before this, and today they are just presented.

But no matter what, from now on, another glorious crown will be added to the throne in the field of physics.

And today’s story will be passed down forever with time.

After the reporting desk, Xu Chuan walked out of the auditorium along the back door and walked towards his office.

Behind him, several of his students quickly followed.

"Professor, your performance in the report today was really great!" Naturally, the first person to speak was Xu Chuan's little fan Rong Xinji. He came out of the auditorium panting and caught up quickly. Xu Chuanhou said with an expression of admiration on his face.

"Yes, I thought there would be some minor flaws in this report at first, but I didn't expect you, Professor, to be so fierce and solve them directly on the spot!"

Immediately, Yin Shi, the only girl among them, also said with stars in her eyes. Although she was not a physics major and could not understand today's report meeting, she knew that her tutor had done another earth-shattering thing at the report meeting.

Listening to the praises of several students, Xu Chuan smiled and shook his head and said, "Which of you will go to the cafeteria to help me prepare some food and send it to my office?"

Hearing this, several students were stunned for a moment.

"Professor, aren't you going to the hotel for the noon banquet?"

Xu Chuan shook his head and said, "You can just go, I have some other things to do here."

Perhaps for others, this matter has been solved when he perfectly proved the small polaron problem of the strong electron-phonon interaction system.

Today's report conference, despite its twists and turns, undoubtedly became more dramatic and legendary.

But for him, today's report meeting was not so perfect. The paper he uploaded to Arxiv and was about to be submitted also needed to be revised.

Maybe he doesn't need to do these things right now.

But at least he needs to remember his mistake today.