Following

Professor Li Aimin, as usual, brought his own textbooks to teach the students, and Xu Mang's appearance yesterday did not disrupt his rules, but he just felt that Xu Mang was a little stubborn, and he knew that it was very difficult, but he still wanted to do it.

It's called stubbornness if it's good, and it's a bit silly if it's bad, no... It's stupid!

The class was over quickly,

Just as Professor Li Aimin was leaving, one of his protégés, Kong Fei, approached him with a difficult problem that he needed Professor Li's help and guidance.

As a leader in optics, Kong Fei's research group collaborated with a research group at Nanyang Technological University to find a three-dimensional optical topological insulator, and the goal of the two research groups was to extend the three-dimensional topological insulator from the fermion system to the boson system.

This greatly improves the propagation efficiency of photons in the waveguide.

But

Problems have been encountered on both sides, the research of three-dimensional optical topological insulators is still a blank in this field, and the experimental research of optical topological insulators is only limited to two-dimensional space, and in many cases a group of people are in the clouds.

"Professor Lee. ”

"Now we have a very troublesome problem. Kong Fei said seriously: "We have encountered a problem in the design of three-dimensional optical topology insulators, and there is a lack of a new artificial anisotropic dielectric material. ”

"Material..."

"You'd better find the material department. Li Aimin said: "Maybe I can help you." ”

“...”

"Professor Li... Two of our research groups are from the Department of Materials. Kong Fei said with a bitter face: "These two people went to their mentors, but they did not satisfy us, and even if the material problem was solved, this experimental design was a big problem." ”

Kong Fei was desperate, this topic was chosen by herself, and Nanyang Polytechnic was also invited by her to study together, and the result... In the first two weeks, I encountered the triple trouble of theory, materials, and experiments, and this research topic seems to be a false proposition at present.

"I'll take a look at it for you in the afternoon. Professor Li said, "But you also have too much hope, and it is very likely that I don't know either." ”

"As long as you can come. ”

Back in the office,

In fact, topological insulators are a research hotspot in the field of condensed matter physics, which is an interesting material that is insulated on the inside and energized on the surface.

Inside topological insulators, the electron band energy results are much like those of conventional insulators, with the Fermi level between the conduction band and valence band, and the quantum state on the surface in the band gap of the bulk band structure, allowing conductivity.

But...

Trying to extend the theory of topological insulators to optical systems, although it has been verified in two dimensions, a research team at Princeton University has experimentally realized two-dimensional optical topological insulators, but this three-dimensional optical topological insulator... The physics community is not optimistic.

Afternoon

Professor Li Aimin came to Kong Fei's laboratory and saw her experimental process, and the result made Professor Li a little helpless, the subject is currently in a theoretical state, there is no ready-made experimental equipment to help with measurements, and even the theory is problematic.

This can't blame Kong Fei and a few people, after all, this is a completely new field, starting from scratch... It is not easy to build a scientific fortress in the ruins, from the electronic system to the optical system, from the two-dimensional to the three-dimensional, there are many essential differences in the object of study.

"It's over," said one of the students pessimistically, "Professor Li... Do we still have a chance to save it?"

Hearing this student's words, Professor Li smiled bitterly, under normal circumstances, the death sentence is pronounced, but... It's not to the point where it can't be studied, and there may be opportunities in the future.

"Actually..."

"You still have a chance. Professor Li said solemnly: "As long as the materials can be found, the remaining problems will almost be solved." ”

material

How not!

But I just can't find it, and I can't even help the material department.

"There it is!"

suddenly

Kong Fei shouted excitedly, just now the shadow of a slut appeared in her mind, this person had a cheap smile on his face, it looked like he was giving it for nothing, but it often gave people unexpected surprises.

His nickname is Pi Pi Xu, his real name is Xu Mang... Professor of theoretical physics in the Department of Physics, he was his primary school brother half a year ago.

"Professor Xu!"

"We can ask Professor Xu for help, and he might be able to solve our problem. Kong Fei shouted.

Xu Mang?

Professor Xu?

Yes!

Hearing Kong Fei's words, everyone present except Professor Li was extremely excited, just... Professor Li Aimin was a little helpless.

"If you want to find Professor Xu, it is estimated that it will take a while. Li Aimin said seriously: "He is designing a new laser machine. ”

“？？？”

“？？？”

“？？？”

What the?

Professor Xu, who is engaged in theoretical physics, actually began to involve laser equipment?

Several people majoring in optics were full of confusion, not that a few people looked down on Professor Xu Mang, but... It's not scientific, it's like a person who sings and dances, and all of a sudden he goes to the NBA to play basketball, how is it possible...

Not to mention the NBA, I guess I can't even get into the varsity team.

"Professor Li?"

"You... You're not kidding, are you?" Kong Fei asked in surprise, "Is Professor Xu really designing laser equipment?" Isn't he studying theoretical physics? Why is he suddenly studying optical equipment, and Professor Xu can't think about it?"

"This..."

He used laser equipment to study the probability problem of quantum mechanics to detect the probability of the appearance of atoms in space. Li Aimin said: "Anyway, you gave up the decision to find Xu Mang for the time being, and now he is really not available." ”

After Li Aimin left,

The laboratory was very lively, and they discussed not the problems they encountered, but the topic of Xu Mang's design of laser equipment.

"Senior sister?"

"You seem to have worked with Professor Xu once, do you think Professor Xu has a high success rate in designing a new laser machine?" asked a student curiously, "I am studying materials, and I don't know the door frame of your physics department." ”

"Difficult!"

"Hardly possible. Kong Fei said seriously: "Although Professor Xu once used pure mathematics to prove that light can travel in a spiral fashion, thus proving a self-torque property of light, this is theoretically proved. ”

And almost all of his achievements were done by theoretical calculations. Kong Fei paused and continued: "It is completely impossible to design laser equipment based on theory, please believe the words of a professional in optics. ”

This...

Didn't Professor Xu give it for nothing?

"Senior sister?"

"Then why is Professor Xu still..."The student frowned and asked with a confused expression, "Then what else is he designing?" ”

Kong Fei thought for a moment, in the face of this Pi Pi Xu, she really couldn't find a reason to explain this strange behavior, and no reason applied to Pi Pi Xu.

Wrong!

Probably idle!

"It's free. Kong Fei smiled helplessly: "Anyway, that's it... Don't talk about him, now let's study our own. ”

Words fall,

Once again, everyone in the lab is in their own way.

...

At half past four in the afternoon,

Yang Xiaoman returned to his and Xu Mang's shelter with a tired body, and when he pushed the door in, he saw his dear, pounced in front of the computer and didn't know what to do, but when he arrived at this temporary residence with little space, Yang Xiaoman's tiredness was swept away.

Maybe...

That's what home feels like.

"Stupid?"

"What are you doing?" Yang Xiaoman sat beside Xu Mang, leaned his head on his shoulder, looked at the three-dimensional diagram on the computer, and asked with a confused face: "Are you building a model?

"Design a laser mesh lattice, a crystal made up of thousands of precisely aligned atoms. Xu Mang said seriously: "I intend to test a probability problem of quantum mechanics, whether probability is equal to everything in a quantum system." ”

Belch?

This... Isn't that what I'm doing, mother?

Yang Xiaoman was stunned for a moment, she and her small team are playing this probability game, usually the market is often in a state of uncertainty, and it is difficult to accurately measure and estimate.

Therefore, Xiao Man will make all kinds of profitable transactions, and then all kinds of hedging, but... This speed of making money is too slow, and now Yang Xiaoman plans to give up hedging and directly adopt an investment model that takes high risks and pursues high returns.

in a word

Her appetite is not 500 million a year later, but a billion a year later.

"Uh..."

"You can also design lasers?" Yang Xiaoman asked with a confused expression, "Are you planning to harm the optics major?"

“...”

"What is a scourge?" Xu Mang turned his head to look at Xiao Man, and said helplessly: "This is called... Forget it, the scourge will be the scourge!"

"Cut!"

"Listening to your tone, it seems to be very unconvinced, it is a disaster to others. Yang Xiaoman glanced at him and said angrily: "Big idiot..."

"How much did you earn today?" asked Xu Mang.

"It's okay. ”

"Earned a BMW 740 today. Yang Xiaoman stretched his waist and said with a smile: "On your birthday... How about I buy you a sports car? Today I heard a couple of guys on the team talking about sports cars, like... It seems that there is a kind of car called A-Ros. ”

Xu Mang looked at Xiao Man in horror, this woman must be crazy... Apollo, the god of the sun, dare to drive this car out by himself? If you accidentally rub it, you will have the heart to commit suicide, and you can't buy this car.

"Forget it... Even if I bought it, I wouldn't dare to open it. Xu Mang smiled.

Yang Xiaoman pouted, seemed to think of something again, and hurriedly said, "That... How about I buy you a Panini?"

Xu Mang: ???

Yes?

Panini?

KFC breakfast?

"Pagani, right?" Xu Mang's face was full of black lines, and he said helplessly: "Twenty or thirty million..."

"How?"

"Your future wife will make so much money, will she put twenty or thirty million in her eyes?" Yang Xiaoman said disdainfully: "I decided, every year on your birthday, I will give you a sports car, you want it, you don't want it, in short... Such a happy decision!"

"Do you know my birthday?" asked Xu Mang.

"X-MONTH-XX DAY!"

Glancing at Xu Mang, Yang Xiaoman asked, "What about my birthday?"

“...”

"Oops!" Xu Mang suddenly stood up and looked in the direction of the kitchen: "There are no dishes in the refrigerator!"

Words fall,

A smoke ran away,

Leaving Xiao Man with a confused face.

"Ahhh

"Bastard!"

"I just told you a few days ago, and you forgot about it again!"

...

early morning

Xu Mang carried his notebook on his back, went to the building of the Department of Physics, and knocked on the door in front of Professor Li Aimin's office for a while, but no one responded.

"Classmates?"

"Do you know where Professor Li Aimin is?" Xu Mang hurriedly asked, catching a student.

"In..."

"In the optics lab on the fourth floor, Professor Xu. The student said with a respectful face.

"Oh..."

After saying goodbye to this kind classmate, Xu Mang hurried to the door of the optical laboratory on the fourth floor, and found that the door was half-covered.

"Huh?"

"Xu Mang?"

"Why are you here?"

......

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