From top stream to scholar

This is, ready to fight?God Yu vs the old god Edward Witten?It seemed to be quite interesting, and the teachers and students of Yucheng University who were sitting in the back felt that it was not a loss for them to come.Perhaps, being able to watch a fight between immortals for free, they wouldn't be the innocent mortals who would be affected anyway.

As for the leaders of Yucheng University, they were laughing like crazy.If there are some academic disputes and the like, as long as it is not something that cannot be brought to the table.This is the good talk of the entire Huaguo school. They believe that both of them are people with self-control, and it is impossible to fight like ordinary people on stage.We are all cultural people, of course we have to use academics to fight, this is fun.

"The 11-dimensional vacuum of M-theory can be characterized by a single scale called the Planck mass mP of the 11-dimensional space-time. If a space dimension in the 11-dimensional space-time is taken as a circle with a radius of R, it can be Linked to Type IIA string theories. Type IIA string theories have a dimensionless string coupling constant gs that is determined by the value of the dilation subfield Φ, a massless scalar field belonging to Type IIA supergravity multiplets. Type IIA The square of the mass scale ms of IIA gives the tension of the basic IIA string, and the relationship between the parameters of the 11-dimensional and 10-dimensional IIA is (omitting the numerical factor 2π) ms2=RmP3, gs=Rms①"

"In string theory, there is also a duality between large and small compact volumes, called T duality. For example, IIA theory is compactified on a circle of radius RA and IIB theory is compactified on a circle of radius RA. Another radius is compactification on the circumference of RB, the two are equivalent, and there is a relationship RB=(ms2RA)-1.

Then, when modulo RA goes from infinity to zero, RB goes from zero to infinity, which gives the connection between IIA and IIB.Although the connection between the two hybrid strings is different in technical details, the essence is the same. ②"

Those who speak on the podium may not feel anything special, but those who listen below are already tired.It was already very difficult to listen to English, and most of what I said touched the blind spots of everyone's knowledge, so I really couldn't understand it.

"M here can stand for magic, mystery or membrane, depending on what you like." Edward Witten finally said.

The people below dozed off, thinking and thinking.

Only Yu Wanzhou stared at the stage with piercing eyes. Edward Witten looked around and found that Yu Wanzhou was looking at him on the stage.

So he smiled and said, "Yu, do you have any ideas?"

Everyone became energetic in an instant, although they didn't understand the M theory at all.But when Edward Witten called Yu Wanzhou, everyone immediately felt that they were full of strength.One by one, they stuck out their heads and looked at Yu Wanzhou curiously.

As if he knew how to answer him.

This time, it seems that Edward Witten really took the lead.It's not Yu Wanzhou who picks things up first, but Edward Witten knows that Yu Wanzhou is just thinking now.After he thinks it over, he will definitely refute himself.

It's better for him to directly point out this point.

Yu Wanzhou said with a smile, "Since Dr. Witten has already asked this point, I will share my thoughts."

Jiang Xi and Yu Wanshen looked at each other, and didn't quite know whether to push Yu Wanzhou down at this time.But under the watchful eyes of everyone, this kind of thing can't be done.

What's more, everyone's eyes are now on Yu Wanzhou.

Just as he was hesitating not to make a move, Yu Wanzhou had already left her seat and went to the front of the stage.Looking at Edward Witten with a smile, he said, "That's very well said, Dr. Witten."

"But it seems that you still disagree."

"M theory is indeed a very wonderful theory." Yu Wanzhou paused when she said this, "Unfortunately, I still don't agree with using M theory to explain the ultimate physical theory."

[Physical theory must reflect the operation of the real world.Does this mean that the physical model is completely determined by experiment?It is generally believed that M theory is not established by experiments.Although the Standard Model can explain a lot, it is basically impossible for physicists to establish a model that unifies general relativity and quantum mechanics purely by experiment, because the high-energy limitations of the laboratory are very obvious.It is impossible for experiments to obtain the high-energy conditions of the Big Bang, and it is almost impossible to meet the minimum energy conditions required by string theory.According to contemporary trends, theoretical physics will eventually be integrated into the melting pot of geometric topology to become a whole, that is, theoretical physics is the new geometry.New geometry unifies relativity and quantum mechanics. ④】

[Physicists have far more driving needs for high-dimensional spaces than mathematicians.Now, there are two correct but contradictory theoretical models in physics at the same time - general relativity and quantum theory. This is not the fault of nature, but physics has lost its direction.Can gravity be quantized?Can dark matter and energy be explained?Can the interior of black holes be detected and the existence of multiverses?The experiment failed to meet its goals.These lost things can only be found by mathematics, especially geometry.The conflict of the physical model lies in the flaw of our geometric theory, how to realize the discrete geometric quantization and topology of the gauge field in the continuous unified field is the key.Physicists cannot theoretically solve their major problems without new geometric configurations being fully worked out.

Modern theoretical physics has been reduced to a mathematical game, and the mathematics of m-theory hopes to be solved through theoretical physics.Physics only provides examples, and the basic structure of mathematics must derive from itself. ⑤】

【…】

After Yu Wanzhou explained her theory, she smiled at Edward Witten and said, "I've thought of so much for the time being, if Dr. Witten wants to continue, I guess I'll have to think about it for a few days. Of course, I am definitely not as good at physics as Dr. Witten, but after thinking about it for a long time, I think that M-theory is not a solution to the ultimate physical theory."

Listening to theoretical knowledge, everyone is drowsy, but if you want to talk about this, then everyone will not be sleepy.

Everyone speculated in their hearts, could these two really be fighting each other?If these two are really fighting, then there will be a good show to watch, at least these two fighting is a show that everyone loves to watch.However, looking at the expressions of the two, it seems that they have no intention of doing anything.

Pairs of eyes turned to the stage, it just depends on how the two of them will reply as they come and go.

Edward Witten said with a smile, "I look forward to it."

"Thank you, Dr. Weiteng." Yu Wanzhou walked off the stage with a happy face, and everyone was stunned.This is the end?It seems that he didn't say anything, that's it?That's it?They've been waiting for so long for an academic disagreement, and this isn't it?

Many people had disappointment in their eyes, and it was over, it was too unexpected for them.I thought that these two people would be able to bloom on the bar, but I didn't expect it to be so harmonious, it didn't meet their expectations at all.

Now that the academic lecture is over, everyone left one by one with unfinished business.The main reason is that Yu Wanzhou and Wei Teng didn't have a lot of time to talk, and I don't know whether the two of them are hiding and have nothing to say, or Yu Wanzhou really only thinks so much for the time being.

In fact, the conversation between the two was not short, at least half an hour added up.But the previous time was too boring, most of the people had already fallen asleep, it was hard to wait until Yu Wanzhou came on stage.It's not talking about it, it's saying a lot of things that they didn't understand, it's like watching a fake movie, and they don't know anything.He listened to the lecture in a daze, and left in a daze.And the dialogue was all in English. The only thing they knew was that Yu Shen didn't know where to find the time to contact the spoken language, which was really good.I am afraid that many students from the School of Foreign Languages ​​cannot do what he does.

I don't even think about it, the literature and materials that Yu Wanzhou usually consults are all original versions, so naturally he has put a lot of effort into English.Basically all documents and materials are in English, and there is no such thing as translation software these days.And a lot of academic content is biased, and no one can translate it into Chinese.Even if someone translates, the quality is unimaginable.It’s better to read the original documents and materials directly. This is how Yu Wanzhou slowly started to learn English while gnawing on the original documents and materials.

I learned it naturally, especially letting it take its course.

God Yu really is a god, this is probably the only feeling after listening to the lecture at Yucheng University.Even if mathematics is top in the country, being able to talk to a great god like Edward Witten in physics is enough to show that his level in physics, at least theoretical physics, is also at the top level in the country. Fluent spoken English.Everyone is dumbfounded, is this the strength of the Great God?

I'm afraid they won't be able to catch up after hundreds of years. God Yu is not yet full.What a frustrating thing this is!

Other people's youth and frivolity are against the theoretical physics giants, blooming on the strong bar, their youth and frivolity, playing games and falling in love in Internet cafes.Everyone is being a human for the first time, why are you so good?

After stepping off the stage, Jiang Xi and Yu Wanshen asked Yu Wanzhou, "Is Xiao Zhou okay?"

Instead, Professor Constantine said with a smile, "The conversation just now was very exciting. I believe Edward Witten is very interested in you. Oh, don't get me wrong, I mean, he has a lot of knowledge about you. interest. He also seems to be looking forward to it, you and him will take different paths to see who can make a grand unified theory first.”

"For the time being, I may not have this need." Yu Wanzhou said with a shy smile, "And, if Hodge conjectures, it will be a contribution to his M-theory, isn't it?"

"Your next topic is Hodge's theory." Constantine said with a smile, "If he knows about it, he will be very happy. Although you have academic differences with him, it seems that you I also want to do something for M theory."

Yu Wanzhou knew that this was Professor Constantine's ridicule. He smiled and said, "Perhaps, I should really do something for M theory. Sorry, Professor Constantine, I will go back first. Tomorrow's academic report, I will I still hope that Professor Constantine will come."

"Of course." Professor Constantine nodded slightly.

He came to Yucheng, where he had never been before, with only two purposes.Discussing the graphene experiment with Yu Wanzhou is one, and the other is wanting to see Yu Wanzhou's academic report.

The author has something to say: ①②③④⑤: Excerpted from Baidu Encyclopedia M Theory