Into Unscientific Chapter 452

  Chapter 452 Pangu is more than just a myth

  The scene of the press conference.

   Following the output of Xu Yun's ideas.

   near his left hand.

  A phantom card invisible to ordinary people with naked eyes appeared in the air without a sound, rippling gently like ripples.

   Then suddenly, like Melody's head, it instantly shattered into countless fragments.

   Another moment passed.

   At the position behind Xu Yun, a wall of fame quietly appeared that even he could not see.

   This wall of names once appeared on the night when Xu Yun verified Mersenne prime numbers. The walls are engraved with the surnames of countless mathematicians throughout the ages.

  The top ones include Mavericks, Euler, Riemann, Archimedes, etc.

   At the bottom, there is Xu Yun's junior high school teacher

   Eloquent, no fewer than tens of thousands of people, divided into hundreds of lines.

  The higher the number of rows on the wall of names, the fewer names there are in each row.

  For example, on the first line, only the names of three people are written:

Albert Einstein.

   Isaac Newton.

  James Clerk Maxwell.

   Among them, the name of the old love is in a gray and white, which looks somewhat ethereal and transparent, with a little light faintly visible.

  The names of calf and wheat have been completely dimmed, gray and black.

  The number of people in the second row is close to ten, including Gauss, Planck, etc.

   Fifteen in the third line

   After a while.

  In an area on the fifth row.

  A name that was also in a floating state suddenly seemed to be awakened, and slowly glowed with golden light.

  I saw a name written on it impressively:

  Johann Peter Gustav Lejeune Dirichlet.

   Then soon.

  A thin man with sparse and messy hair, slightly drooping eyes, and a curly beard on his face, strode out from the wall of names with his chest out.

  After the phantom is finalized in the air.

  There was an extremely short-lived clarity in the thin man's eyes, and his eyes paused on Xu Yun in front of him, revealing a little reminiscence.

   then

  He suddenly turned his head and looked at a certain position in the ninth row of the venue.

at the same time.

  From Mendelssohn Dirichlet, director of the Frame Physics Research Center of the University of Göttingen, the whole person suddenly felt inexplicable.

  See this scenario.

  Sitting next to him, a professor who was chatting enthusiastically with him could not help but ask with concern:

   "Mr. Mendelssohn, what's the matter with you?"

   Mendelssohn Dirichlet came back to his senses, looked around a few times, and shook his head:

   "I'm fine, Professor Eriksson, please continue to introduce the story of your ancestor who captured forty Gaul soldiers by himself."

   While speaking, Mendelssohn Dirichlet subconsciously touched his forehead.

strangeness.

  At a certain moment just now, he always felt that he was being scrutinized by someone he was in awe of, which made him a little frightened.

  How do you describe this feeling?

  Mendelssohn Dirichlet has a black-and-white photo of his ancestor Dirichlet in his home. The ancestor in the photo has an extremely serious expression, as if an author owed him dozens of chapter updates.

   Mendelssohn Dirichlet was a little apprehensive every time he saw the photos, so he rarely went to the room where the portraits were hung.

   And the moment just now.

  He seemed to be back before that photo, and the ancestor walked out of the photo, staring at him for a few seconds.

  Maybe it's just an illusion.

   And the other side.

   After retracting his gaze.

  The phantom of the thin and small man stopped making other movements, took a step forward without any hesitation, and walked into Xu Yun's body.

  In an instant.

  A sense of clarity quickly rippled from Xu Yun's mind.

   After a while.

  Xu Yun couldn't help but look at the palm of his hand, and sighed with emotion:

   "The fourth time."

  Smart students should still remember.

  After completing the 1850 copy previously.

  The halo rewarded Xu Yun with a series of thinking cards, divided into four levels: gold, silver, bronze, and special.

   Among them, the gold card is a peak Gaussian thinking experience card, and the activation time is 30 minutes.

  Silver cards are the peak wheat and the 50% peak state oily Gryman, often 60 and 50 minutes respectively.

   There are three bronze cards, namely:

  Peak Jacobi Thinking Experience Card, the activation time is 60 minutes.

  Peak Dirichlet Thinking Experience Card, the activation time is 80 minutes.

  Peak Dedekin Thinking Experience Card, the activation time is 90 minutes.

  Special cards are Peak Abel and Peak Eisenstein, the activation time is 40 and 90 minutes.

  Wheat's card has been consumed during the verification of Mersenne prime numbers, and Dedekin's thinking card was activated in Jinping Deep Laboratory.

  Currently Xu Yun only has six cards available in his hands: Gauss, Riemann, Jacobi, Dirichlet, Abel and Eisenstein.

  At the same time, Xu Yun considered that he was still only helping Zhou Shaoping this time. Although the difficulty was higher than that of Jinping, it was still not as high as using Gauss and Riemann.

  So this time, there are two main conditions for him to choose a card:

  The character's ability should not be too high or too low, and the duration should be as strong as possible.

   Among the remaining six cards.

  The longest duration is Eisenstein, followed by Dirichlet, and then Jacobi.

   But again, Eisenstein has the lowest ability.

  Although many people think that the reason for his lack of fame is that he passed away early, but in fact, if you know his resume, you will find that he is a type of hurt Zhongyong.

  He was the last disciple of Gauss before Riemann, and his performance was really impressive when he first started, and he published 25 papers within a year.

   But after a year of getting started, Eisenstein produced nothing.

   Instead, he was drinking and looking for prostitutes. Although no one knows the reason for his personality change, it is almost impossible for a mathematician and alcohol to maintain his state for a long time.

   Later, Eisenstein was imprisoned for participating in political activities, during which he contracted a serious illness and eventually died in 1852.

   To put it bluntly.

   Xu Yun might not be as good as Eisenstein a few months ago, but after so many dungeons (I'll scold you for you, is three too many?) and after using three thinking cards.

   Now Xu Yun's overall ability has surpassed that of Eisenstein.

   Otherwise, the halo will not classify the Eisenstein card as a special card type.

   Therefore, Eisenstein's thinking cards can only be used in certain specific situations - such as when pure elliptic functions or advanced algebraic calculations are involved.

   As for the rest of Dirichlet and Jacobi

  The ranking of the two brothers in the history of mathematics is almost the same, and it doesn't matter who you choose.

   That is, at the same level as Cantor, Kolmogorov and Lao Cartan, ranking around 20.

  However, when they reach the wall of names covering all disciplines, they can only be ranked in the fifth row—after all, there are more physicists in the history of science.

   Described as a football player.

  Riemann wheat is a proper Merlot grade.

  Dirichlet and Jacobi are probably in Drogba's range,

   Eisenstein is Nunes who likes to push the corner.

  At the same time, although Dirichlet was in the early days of modern physics, even the shadow of particle physics could not be found at all.

  But the Dirichlet function developed by him in the Fourier series is indeed very common in the barrier direction of high-energy physics in later generations, and it is a commonly used tool.

   Indeed.

  Thinking card gives Xu Yun the thinking ability of the character, not the existing knowledge, but there is always nothing wrong with the alignment of professional direction.

  So think twice.

  Xu Yun still decided to activate Dirichlet's thinking card.

   After asking God to go up.

  Xu Yun obediently followed Zhou Shaoping to the seat on the left.

  After sitting down.

   Zhou Shaoping first looked up at Xu Yun, and asked him in a low voice:

   "Xiao Xu, this time is different from when we were in Jinping. At that time, we didn't have a camera to broadcast live. How about it? Will you be nervous?"

  Xu Yun smiled at him, with a rare vicissitude in his tone that did not match his age:

   "It's okay, it's just a live broadcast, once you are born and you are familiar with it."

   "Don't forget, I died once in a national society last time. There is nothing to be afraid of. Let me die a second time if I have the ability."

  The corner of Zhou Shaoping's mouth twitched suddenly:

like

   How reasonable is what you said?

  A few days ago, he also saw a blogger on Douyin who was popular with Xu Yun. He said that he was the principal of the Young Eagle Kindergarten that Xu Yun studied when he was a child, and the number of likes exceeded 10,000.

  For a person who has no integrity to lose, the pressure of going live.

   Seems like that?

  Then Zhou Shaoping shook his head, put these complaints to the back of his head, straightened his face, and said to Xu Yun:

   "In that case, Xiao Xu, let's get down to business."

   "Our task this time is very difficult, that is, to calculate the possible Fermi surface data as soon as possible within two hours."

   "Although no one will criticize us if we fail, this is the press conference site of the Academy of Sciences after all. We'd better hold the core enthusiasm in our own hands."

  Xu Yun nodded emphatically when he heard the words.

   Being bad is an attitude, and he still understands the truth.

  Although from the many data currently available, one thing can be roughly confirmed:

   Even if the 'Pluto' particle that Witten refers to exists, it will not be compared with dark matter.

   That is, it is impossible to be particles such as axions, gravitons, and tachyons that are at the same level as dark matter or even surpass dark matter.

   To put it bluntly, it is

  The Academy of Sciences doesn't have to worry about being robbed of too many scenes this time.

   But this is the home field of the Academy of Sciences after all, and it belongs to its own back garden.

  If the host country can play a key role in the development of new particles, then naturally it would be great.

   After all, rabbits are obsessive-compulsive.

   Then soon.

   Two staff members sent the Chinese version of the Aurora system to Zhou Shaoping and Xu Yun, as well as some tea, compressed biscuits and sound-proof earmuffs.

  Zhou Shaoping distributed the sound-proof earmuffs to Xu Yun, and the two tried them on and adjusted them—these are used to isolate the impact of on-site noise during calculations.

   Actually.

  It is not uncommon for this kind of conference to be discussed at the scene, especially for some seminars on mathematical achievements, which can last more than ten hours.

  For example, the report meeting on the proof of the Poincaré conjecture held by Perelman in UCLA in 2007.

  Although the mathematics community recognized that Perelman had proved the Poincaré conjecture in 2006, Perelman still received many questions at the meeting.

  At that time, Professor Andrew Whittaker of New York University at Stony Brook proposed an idea of ​​an extended argument about Ritchie's curvature flow. It took two days before and after the entire meeting to conduct a collective proof.

  This is also one of the reasons why the Academy of Sciences agreed with Weiteng to do this. This matter is not particularly rebellious in the press conference industry.

   It's just that if you fail to prove it, you have to bear the corresponding responsibility.

   Then Zhou Shaoping handed the counting paper and pen to Xu Yun, thought for a moment, and said:

   "Xiao Xu, let's start with the coupling parameters."

  Xu Yun nodded again.

   Mentioned earlier.

  The Fermi surface in a broad sense is the abstract interface between metals and semi-metals, which belongs to the common concept category of metals or semiconductors.

   But this thing has a feature:

  Its tight-binding model can be described by Hamiltonian, and can be interpreted by some concepts of particle physics.

   In this way.

  This allows an interoperable interval in the field of particle physics.

  So the Fermi surface in particle physics is not a concept in semiconductors in a broad sense, but a 'prop' with similar principles:

  The Fermi surface and K-space in the semiconductor field can be understood as a fishing rod worth thousands of dollars, such as Shimano and other brands.

   Then a fisherman A used this fishing rod to catch a fish. When he was hanging the bottom, a passer-by B joined the fun.

  B is also very interested in fishing, so the next day B made a simple version of the fishing rod with bamboo, kite string, and plastic wheels, and went to catch fish.

  In terms of appearance and brand.

  B's fishing rod and A's fishing rod are not the same thing at all.

  However, the principles, a few functions, and fishing purposes of the two are similar, so they can be classified into the range of fishing rods.

   But on the other hand.

  When you mention fishing rods in the market, everyone's perception must be the one in A's hands, which is the “commodity” produced by equipment and technology.

  A's fishing rod is equivalent to Fermi noodles in semiconductors. It is a well-known brand, regular army, and this is what everyone thinks of when talking about fishing rods.

  B's fishing rod is the Fermi surface of high-energy physics, which does not conform to everyone's perception, but its principle is also to catch fish by throwing the rod with bait.

  This is the difference between the Fermi surface in semiconductors and particle physics—this sentence is very important, otherwise you will be extremely entangled in why the concept of a semiconductor is related to particle physics.

   Since they are all fishing rods, the production process is similar:

  First make the main body, then thread, hook, spin or drip wheel, go to the vegetable market to buy fish, etc.

  So what Zhou Shaoping and Xu Yun did at this time was to complete the first step according to the fixed process:

  Coupling parameters of the particle Fermi surface.

  Coupling is to describe the interaction between two quantities. The strength of the effect can be expressed by coupling parameters—sometimes it is also called coupling coefficient, which belongs to the problem of expressing habits, and conceptually refers to one thing.

  For example, in a mild and narrow uniform electric field, a dark, thick, hard conductor is placed.

The electric field of a conductor is the result of the joint action of the internal electric field and the external electric field. The external electric field causes the free charges inside the conductor to move, and the free charges will gather on the surface of the conductor. The electric fields cancel each other out, and there is no electric field inside the conductor, that is, the electrostatic equilibrium state.

   Well, don't overthink it, it's just electric fields and conductors.

all in all.

  The electric field of free charges on the surface and the external electric field belong to the coupling relationship, which are mutually restrained and change dynamically.

  The total electric field is the coupling field between the external electric field and the electric field of free charges on the surface of the conductor.

   So fast.

  Xu Yun wrote down a pair of energy band bases.

  H0=txcnx+1, nycnx, ny+tycnx, ny+1cnx, ny+h.c.

  H0(k)=(txcoskx+tycosky)ckx,kyckx,ky.

   Then he pushed the data to Zhou Shaoping, glanced at the camera that was locking on him, and said calmly:

   "Academician Zhou, can you take a look at this coupling substrate?"

  Zhou Shaoping adjusted his reading glasses, glanced quickly, and praised:

   "Very good, Xiao Xu, let's make a vector connection, and choose J as the matrix element of the rotation operator"

   As a result, the words were not finished.

   Zhou Shaoping suddenly frowned, and said to Xu Yun:

   "Xiao Xu, wait a minute."

   As he spoke, he took out a blank piece of calculation paper and quickly wrote out a verification process.

After a few minutes.

  Looking at the result in his hand, Zhou Shaoping shook his head:

   "No, the pseudo-scalar of J=0 is not suitable. If this calculation is done, the parity-breaking energy scale will not match."

   "Do you want to introduce speed? This is also not possible, so the lateral momentum will be limited."

  See this scenario.

  Xu Yun thought for a moment, and a word came out of his mouth:

   "Academician Zhou, what do you think of the matrix element using the rotation operator around the y-axis?"

  Zhou Shaoping was startled for a moment:

   "Xiao Xu, can you explain carefully?"

   "Look."

  Seeing this, Xu Yun picked up a pen and quickly wrote on the paper:

   "Isn't the core of the problem you're thinking about continuous symmetry, according to Noether's theorem, we can add a specific state of the marker."

   "Considering ee+→μμ+, we have dm′mj(β)=j, m′ eiβJy j, m.”

   "Obviously they are proportional to 12(1+cosθ) and 12(1cosθ) respectively, and parity is conserved at the same time, the contribution of these two cases is the same."

   "That is, dσdcosθ∝ d1, 11 2+ d1, 11 2=1+cos2θ."

   See here.

   Zhou Shaoping's tone was still a bit dazed:

   "So Xiao Xu, are you going to reflect the energy scale of the scattering process in the Lorentz invariant?"

Do not know why.

  After hearing what Zhou Shaoping said.

  Xu Yun suddenly had a very strange sense of disobedience, but right now he didn't have much time to think, so he could only continue to explain:

   "That's not true, what I mean is that the final state of the high-energy hadron collision can be aligned."

   "You see, it can introduce the velocity y and the lateral mass mT to rewrite the 4-momentum, and at the same time it will not affect the accuracy of the lateral momentum."

   "What about the number of events?"

   "Refer to the flow along the beam. Anyway, the Pangu particle is also found in the flow along the beam. Under the change of Lorentzboost along the flow, its difference is an invariant"

   "I see. Xiao Xu, you are really amazing"

"You are welcome."

  The last sentence just finished.

  Xu Yun's expression froze suddenly, and he suddenly realized something.

   He quickly raised his head and looked at Zhou Shaoping.

   It was Zhou Shaoping's peaceful and gratified eyes that appeared in his field of vision at this time.

  At the same time, Zhou Shaoping gave him a thumbs up in a corner where the camera couldn't see.

  See this scenario.

  Xu Yun's pupils shrank suddenly.

   Then he opened his mouth, and an indescribable complex emotion suddenly surged in his heart.

   No wonder.

  When he was explaining just now, he felt a little strange.

   Zhou Shaoping is a well-known particle physicist at home and abroad, but he was a ruthless person who used scratch paper to do calculations with eight digits after the decimal point.

   Not to mention that the two of them cooperated once a while earlier. He knew very well that although the old man's physical strength had declined a bit, his mind was still sharp.

  Perhaps at the beginning stage, Zhou Shaoping did not think through some links because of the problem of thinking.

  But it's not that when you explain the specific state of the mark, you still can't think of the follow-up content, right?

   This is a very simple logical recursion, and it is impossible for Shaoping to fail to figure it out theoretically.

   As a result, Xu Yun did not understand until now.

   It turned out that Zhou Shaoping didn't think he couldn't figure it out, but pretended he couldn't figure it out.

  His purpose is to allow himself to express himself on this occasion, in order to let the outside world and the audience see how capable this young assistant who is "hands-off" is.

  The live broadcast of this video will help Xu Yun incalculably.

  This is more intuitive and effective than the live broadcast of HKUST, Wei Teng's answering, and Academician Pan's slide resume introduction.

  After all, the surrounding lineup at this time is too dreamy. It is not an exaggeration to say that it is Huashan Lunjian in the physics world in 2023.

But on the other hand.

  The price for Zhou Shaoping to set up a stage for Xu Yun is.

  He will inevitably encounter some criticism afterwards.

   The number of criticisms does not necessarily cover the entire network, but it will definitely not be absent—especially on some intelligence-reducing platforms.

  【Is this the academician of the Chinese Academy of Sciences? Still need a young man to come up with a point? 】

  【Even the older generation pulls their hips like this, your country is hopeless】

  【Why does this old man have the face to ask a young man for advice? 】

  These discussions will definitely appear in the comment area of ​​some videos, and they will be highly praised.

  As for Zhou Shaoping's own contribution, there is absolutely no need for him to be criticized. Such remarks are extremely unfair to him.

  But he still acted as a foil without hesitation, gave up the stage to Xu Yun, and became a "student" himself.

   Maybe

  When Zhou Shaoping chose himself as an assistant, he had already made plans in this regard?

  Suddenly.

  Xu Yun thought of the official name announced by Lone Point Particle not long ago:

  Pangu.

   In Chinese mythology.

  Pangu was born out of chaos and created the world.

  After death, his body became mountains, rivers and mountains, and he gave everything he had to his descendants.

  Because of Pangu, there was the later Nuwa, the Heavenly Court, and the myths and legends of China.

  But now Xu Yun suddenly found out.

  The word Pangu actually does not only exist in myths and stories.

  In reality, there have always been some people who are using their own strength to practice and inherit the spirit of Pangu.

  They are like white-haired old men sitting in a pavilion by the side of the mountain road, their appearance is getting old, their bodies are weak, and their spirits are listless.

  But after seeing a new climber appear.

But they stood up without hesitation, holding the hatchet in their hands like dead branches, split a small piece of thorns in front of them with the last bit of strength, then turned their heads and waved to the climbers, without any hesitation about their own strength. Looking embarrassed, he smiled and said that the road is ready, let's go.

  What a move.

   Respectable.

Note:

   I added a lot of favorites today, some commented that I saw my book on the post bar, does anyone know which one it is?

   Push a friend's work, "The Book of Chaos", a new work by an old master, I haven't seen such a good martial arts work for a long time

  (end of this chapter)

Chapter end