Chapter 606: How to integrate nuclear power 1!

Hold the grass?
Lushen?
Idol!
Seeing the man standing up, Zhang Zhongqing almost didn't drop his glasses on the ground.
The thought of this big man sitting in his classroom listening to such a long day of class, he was really shocked and happy at the moment, just like winning the lottery. I was surprised that I didn't notice it at all. I was happy to go out and brag with others. We are also the ones who have given lessons to Nobel Prize winners.
However, although Zhang Zhongqing's hearts were mixed, Lu Zhoudao didn't feel much.
The classroom itself is also one of the places for academic exchanges.
When he was in Princeton, he often asked his students to speak for himself.
At least in his opinion, communication scholarship is irrespective of status and honor.
"Professor Lu please." Professor Zhang immediately made a please gesture, respectfully let out of the podium.
"Don't be so polite, I just happen to have an idea."
Looking at his modest movement, Lu Zhou smiled embarrassedly.
It's too time-consuming to continue to be polite.
Moreover, he is not a man of love.
Walking to the blackboard, Lu Zhou picked up a piece of chalk.
"This kind of problem cannot be solved by undergraduates. In addition to a deep understanding of quantum chromodynamics, a deep grasp of functional analysis is also required."
After a pause of two seconds, Lu Zhou continued, "However, it is not as complicated as everyone thinks."
Speaking, the chalk in his hand was printed on the blackboard, and Lu Zhou calculated while writing.
"From the field theory, the Feynman diagram can be used to calculate the scattering amplitude using Feynman rules ..."
[IM = 2m ^ ss · 2mδ ^ rr]
[……]
"Where mφ represents the mass of the corresponding boson, and g comes from the coupling constant in the Lagrangian interaction. In combination with Professor Zhang's previous calculation steps, V can be obtained from the scattering cross section ..."
[V = -g2 /]
After writing here, Lu Zhou stopped the chalk in his hand and looked back at the staircase classroom, or the students who were aggressive or serious listening, smiled.
"It's all fairly simple, but this next step will use a few tricks."
Students: "..."
MMP!
Where is it simple? ? ?
Zhang Zhongqing, who was standing beside him, looked blank.
It wasn't that he couldn't understand it, but that he couldn't believe it. Someone could deduce these things on the spot in such a short time.
Doesn't this person need to spend time in computing?
If that's the case, it would be too scary ...
Without stopping, Lu Zhou, who had finished the sentence, turned to face the blackboard again and said lightly.
"Inverse Fourier transform it!"
The snoring of chalk rubbing against the blackboard is getting faster and faster, and Zhang Zhongqing's expression standing beside him is more and more shocking. As for the students in the audience, they stared blankly at the blackboard. Even the Xueba who had already turned the textbooks ahead of time, faced with the complicated calculation process, he was still at a loss.
But at this moment, Lu Zhou hadn't noticed their expressions, and was totally immersed in his own world.
Admittedly, these are very basic things, but they are not basic enough to appear on example questions or examination papers.
However, as he deepened his thoughts on these fundamental issues, and as more and more steps appeared on the blackboard, his consciousness became clearer and clearer.
Why do strong interaction forces only work at extremely short distances?
Or, to put it another way, what makes nuclei form nuclei only at very short distances?
The answer is obvious ...
[……]
[V = -g2 / 4πr · e ^]
The chalk in his hand stopped, looking at the calculations on the blackboard, Lu Zhou said slowly.
"Electromagnetic interactions exchange photons, and the mass of photons is zero, so for electromagnetic interactions, V is proportional to 1 / r."
"The nucleus that provides the nuclear force is the meson acting between the nucleus, with a mass of about 200 MeV. The calculation of the carry-in can only estimate that only the distance term is on the order of the negative fourteenth power of 10. Nuclear force can cancel the electromagnetic repulsion between protons and cause fusion reactions. "
Applause started from the first row.
It was spreading backward like a wave crashing on the shore.
Professor Zhang, standing beside him, applauded unconsciously.
For most students, it may just be a lively look.
But for him, he saw a simpler solution to nuclear distance ... at least more concise than the two he remembered.
Incredibly, these were done on the spot in less than ten minutes ...
The shock in his heart at this moment, I'm afraid only he knew it.
At the same time, the podium.
Although the classroom has been filled with applause, the land boat standing in front of the blackboard is still immersed in his world at this moment, so that when the applause stops, he doesn't notice.
For the previous simple problem, this step is over.
However, he is thinking more than just this.
According to the viewpoints in quantum field theory and quantum chromodynamics, the four basic forces and traditional particles can be unified.
For example, at different positions in space and time, the components of the electric field can be constructed as non-commutative operators. When constructing the Hilbert space where these operators operate, traditional particles such as electrons can be reinterpreted as Dirac fields. Quantization.
As a result, the difference between fields and particles disappears.
Is it possible to use a concise mathematical form, such as Weinberg's unified theory of weak electricity, to describe electromagnetic forces and weak interaction forces in a unified way, to describe strong interactions, and to unify them with electromagnetic forces ?
Answering this question cannot solve the miniaturization of controllable fusion, nor can it bring any degree of innovation to the existing controllable fusion technology. This question provides a clue, or idea ...
Of course, trying to do this is not easy.
For example, a strong interaction force is different from a weak interaction force. It has a very typical problem ...
After the bell rang, Lu Zhou was still standing still, seeming to be thinking about something.
Seeing that Lu Zhou did not respond, Zhang Zhongqing was also not good at announcing the class without permission, and he did not dare to disturb his thinking.
It took about ten minutes and so long ~ EbookFREE.me ~ Staring at the simple calculations on the blackboard, Lu Zhou suddenly said to himself.
"How to explain the existence of a mass gap in mathematical language?"
After hearing this question, Zhang Zhongqing took a subconscious look, then blushed, and felt like a student for a while.
"... This, I really don't."
"I didn't ask you, you definitely won't ..."
Talking to himself, leaving the calculations full of blackboards, Lu Zhou turned and left the classroom, leaving a look of professors and students with a misgiving.
No one can answer this question.
After all, this is one of the hardest propositions about unified field theory in particle physics today.
At the same time, it is also recognized by the international mathematical community, one of the seven millennial problems ...