On the lecture platform, Xu Chuan paused after writing a line of headlines.

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 it is my responsibility to fix the flaws and errors in the paper." ”

"As compensation, I will stay at NTU for three days after today's briefing. During this period, all the people present can come to me to communicate with the difficult questions related to this new theory, and I will do my best to answer them for you. ”

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

"OK, let's get down to business."

As he spoke, Xu Chuan turned around and wrote the next mathematical formula on the blackboard:

【H=p/2m+∑qhωaqaq+∑q(VqAqE^iqr+.) 】

"I believe that everyone can easily understand the formula I wrote down, and you all know what it is."

"One of the greatest achievements of the twentieth century in condensed matter physics is the theoretical image of a single electron band or Fermi liquid in a weakly interacting system, which has brought us a whole new approach to particle physics."

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

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

"That includes the polarization subsystem."

"Polarons are quasiparticles, most typically electrons in ionic crystals that are encased in phonon clouds. Generally, according to the size of the polaron, it is divided into the so-called large polaron and small polaron, the former scale is much larger than the lattice spacing, or basically the size of the lattice spacing.

"To fully understand the polarization subsystem, it is necessary to "

On the lecture platform, Xu Chuan slowly opened his mouth and explained from the most basic polarization subsystem.

No way, it has to be done to fully understand his report today.

In the auditorium, Witten's eyes were firmly fixed on the lecture table, and when Xu Chuan erased the formula on the blackboard and wrote the first line of the equation again, he couldn't take his eyes off it anymore, for fear of missing any formula, even a punctuation mark.

The worries in my heart have been completely forgotten at this moment.

All I have in my mind at the moment is that line of wonderful formulas.

There is nothing more exciting for a scholar than this.

On the other side, in the corner of the auditorium, Feng Xun, a student of Southern University who came over with his mentor Chen Zhengping, looked at the 'senior brother' on the stage with a confused expression, and couldn't understand what he was doing on it at all.

"Professor, Senior Brother Xu. What is this being written? ”

After enduring it for a long time, the newly recruited student still didn't hold back his mouth and asked the tutor sitting next to him.

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

Because if he doesn't, he probably won't be able to keep up.

Although he used to be Xu Chuan's mentor, I have to say that the student he led, let alone mathematics, was in physics, and he was good at condensed matter physics and high-energy physics.

Meanwhile, sitting in the front row, Millennium Technology Prize laureate Professor Stuart Parkina stared at the lecture stand, muttering to himself, with a hint of excitement and excitement.

"Does the entropy change of the lattice carrier change originate from the degenerate effect caused by the carriers? The electron-phonon interaction actually causes the phonon dispersion to soften at the position of the double Fermi wave vector. It's incredible. ”

Beside him, another professor in the field of condensed matter said with a solemn face: "Yes, I never thought that small polarons could be explained in this way, and the quasiparticle characteristic peak we have been looking for now seems to be completely wrong." ”

On the lecture platform, Xu Chuan was still writing the formula in his hand, explaining the 'Typical Behavior Theory of Small Polarons in Strong Electro-Phonon Interaction System'.

This is a theory he had established in his previous life, although he had not yet studied these things in his lifetime. But for him, it is impossible to forget this knowledge by forgetting anything.

When the title falls on the blackboard, the theory buried in the depths of memory is quickly revived.

With his explanation and writing, the little time left in the morning passed little by little, and when the time came to twelve o'clock, the teacher in charge of administration in the background of NTU found the school leader with some anxiety and anxiety.

"Principal Tan, you look at it is already twelve o'clock, do you want to eat first? The people at the hotel have already asked several times. ”

Looking at the figure on the stage who was still continuing to report, Tan Shaoyuan thought for a while and said, "You let the hotel prepare first, and if this side is over, serve the food immediately." ”

"As for when it will end, I'm not sure for the time being, if it drags on until a little later, I'll figure it out later."

"In addition, you arrange for someone to get some small cakes or biscuits and other food, and send one to the scholars present to fill their stomachs first."

Although he didn't understand it, he knew the importance of today's temporary addition to the report to Xu Chuan.

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

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

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

At this point, let Xu Chuan stop explaining and go to dinner first, not to mention whether Xu Chuan will agree, even if he agrees, I am afraid that the hundreds of physicists in the auditorium will not agree.

For an academic, it is far more important to pursue a field that has never been set foot in than to eat.

Of course, for NTU, this kind of thing still needs to be considered in many aspects, after all, this conference is oriented to the international image.

As the host, it is important to take care of the guests who come to the conference.

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

After all, among the scholars present, many of them are over seventy or even eighty years old, and even if Xu Chuan can hold up such a high-intensity report, these older generation bulls may not be able to resist.

Fortunately, when it was close to one o'clock, Xu Chuan began to wrap up.

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

At the same time, the evolution of the reverse polarity system over time is solved by a non-adiabatic kinetic method. The motion of the lattice satisfies the classical Newtonian equations of motion: Mü,(t)=- K[2u,(t)- Un+1(t)- Un-1(t)]+2a[+!( t)(t)]+I el E(t)[(1)- 1]”

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

Under the lecture stage, when he heard this step, Edward Witten, who had been sitting upright and holding his body, finally relaxed, leaned back on the soft chair, and had a smile on his face.

"Another miracle, it's hard to imagine how he did it."

Beside him, Nobel laureate Professor Michael Kosterlitz stared at the blackboard on the stage for a moment before he spoke softly, as if in response, as if talking to himself: "Could this be what he was ready for?" ”

"Huh?"

Coming back to his senses, Kosterlitz smiled and said, "It's like a magic show, the flaws and details that can be seen by us are deliberately made by the magician to the audience." ”

And when we went to debunk this flaw and tried to deny his performance, we found that everything was under the control of the magician. The so-called flaws are just things that he deliberately let us see for the sake of performance. ”

After a slight pause, he continued: "After all, it's hard for me to believe that someone could complete a transcendent problem in such a short period of time, still at the site of this kind of report meeting, if it wasn't prepared in advance. ”

"Based on the time-sensitive Schrdinger equation and Newton's equation of motion, under the strong correlation system, the ground state is not the scattering of electron polarons and hole polarons in the degenerate polymer, but the electron polarons and hole polarons move in opposite directions along the polymer chain under the action of the electric field, 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 present a phenomenon of forward and reverse polarization oscillation, and the system finally reaches a dynamic equilibrium."

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

"That's all for the additional report, and I believe that with the knowledge of all of you, it will not be difficult to understand this set of theories."

"The theory of the typical behavior of small polarons in the strong electro-phonon interaction system is an interesting puzzle, which belongs to the part of the strong interaction and the part of the unified theory of strong electricity."

"In the coming time, I hope that it can play a role in the field of strong electricity unified theory and strong interaction, so that more people can see and devote themselves to these fields."

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

Offstage, David Gross met Xu Chuan's gaze, and then moved his gaze to the blackboards on the report stand, where the dense formulas had already completely conquered him.

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

That's all for the additional report. Over the next three days, I will do my best to answer questions about this new theory until there are no more questions. ”

"Thank you for your patience, and the Q&A session will continue in the afternoon. As for now, please move to the restaurant to eat, after all, it is not early. ”

With that, he bowed slightly towards the auditorium as a sign of gratitude.

And at this moment, in the auditorium, the flood-like applause lasted for a long time like a wave.

Even though Xu Chuan had left the report desk and couldn't see his back, the applause still continued.

For all of us sitting here today, this is a miracle of physics that has never been more amazing than ever.

The breakthrough of the unified theory of strong interaction and strong electricity was witnessed here.

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

Of course, more people prefer to believe that the relevant theories have been perfected long before this, and today they are just coming up with them.

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

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

After the lecture 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 is amazing!" The first to speak was naturally Xu Chuan's little fan Rong Xinji, who caught up from the auditorium out of breath, and after quickly catching up with Xu Chuan, he said with an expression of adoration on his face.

"That's right, I thought there would be some small flaws in this report at first, but I didn't expect you to be so fierce Professor and solve it directly on the spot!"

Immediately, Yin Shi, the only girl of several people, also said with stars in her eyes. Although she is not a physics major and cannot understand today's report meeting, she knows that her mentor has done another earth-shattering thing at the report meeting.

Listening to the praise of several students, Xu Chuan shook his head with a smile and said, "Who will go to the cafeteria to help me get 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, "It's good for you to go, I have some other things here." ”

Perhaps for others, this matter has been solved when he perfectly demonstrated the small polaron problem of strong electro-phonon interaction systems.

And today's report, despite the twists and turns, undoubtedly added more drama and legend.

But for him, today's presentation was not so perfect, and the papers he uploaded to Arxiv and his upcoming submissions also needed to be revised.

Maybe he didn't need to do these things now.

But at the very least, he needs to remember the mistake he made today.

(End of chapter)