The Literary Life of a Science Leader

Chapter 135 Learning Condensed Matter Physics (1 and 24)

The two who have just confirmed their relationship naturally want to be together very much.

So in order to enjoy this good time more, Mu Jingchi didn't drive directly back to the community, but parked the car outside.

Then he walked into the community hand in hand with Song Xiaoyi, and walked slowly towards the building partition.

"Okay, let's go in?"

Taking the elevator to the 27th floor, Mu Jingchi let go of Song Xiaoyi's hand. The two of them were going to separate temporarily and had to go back to their respective homes.Of course, he didn't mind Song Xiaoyi going to his house, but it was better not to act so eagerly.

Song Xiaoyi's palm was loosened, but her index finger was still hooked on Mu Jingchi's hand, shaking her own arm, and even her own body was shaking from side to side, looking up at Mu Jingchi with her big eyes open , expressing a cute and reluctant expression.

Seeing such a cute scene, Mu Jingchi couldn't bear it.

With a pull of his left hand, he pulled Song Xiaoyi's body over, then hugged her in his arms, bowed his head and kissed her.

Song Xiaoyi also closed her eyes, trying her best to respond.

His hands crossed over Mu Jingchi's waist, entwined upwards, and finally hugged his back tightly, as if his whole body melted into the other's body.

a long time.

Lip points.

"Go in!" Mu Jingchi pursed his lips slightly, as if he was savoring the taste of kissing, "If you don't go in again, Auntie will get impatient waiting below."

Listening to Mu Jingchi's words, Song Xiaoyi was a little puzzled, "What?"

The corners of Mu Jingchi's mouth curled up nicely, a bit sly, "When we came back, Auntie was hiding on the side of the road and watching us secretly!"

Song Xiaoyi immediately reacted, dumbfounded, "You mean, my mother?"

Mu Jingchi nodded, the smile in his eyes narrowed even more.

"You..." Song Xiaoyi was confused and at a loss, pointing to Mu Jingchi, then to the elevator, and finally said, "Why didn't you tell me?"

"Why do you say that? Our relationship is aboveboard and not sneaky."

Mu Jingchi said with a smile.

Afterwards, he walked into his house with evil intentions, leaving Song Xiaoyi facing her mother alone.

"Mujingchi!"

Song Xiaoyi shouted.

···
Why do you want to go back to your own home.

In fact, Mu Jingchi was also a little at a loss.

While walking around with Song Xiaoyi, he saw Aunt Zhao, but at that time he was holding hands and chatting with Song Xiaoyi. It was not his character to let go.

Since he chose to confess his love to Song Xiaoyi, it was the result of careful consideration.

Will not give up because of other people's reasons.

At that time, Aunt Zhao must have seen the situation of the two of them. If she let go, it would not only be bad for Song Xiaoyi, but also leave a bad impression in Aunt Zhao's heart.

As for how to face Aunt Zhao in the future, Mu Jingchi didn't know what to do, so he took one step at a time.After all, there is always a feeling of guilty conscience for beating someone else's daughter.

Shaking his head and throwing away these thoughts, Mu Jingchi walked into the study and started to continue his journey of learning.

I had been socializing outside because of the project, and I had no motivation to study after being drunk, so my study rhythm was delayed for a few days.

Mu Jingchi must pick up this rhythm, otherwise he will develop a habit of laziness if he continues to indulge.

Mathematics, Physics, Mechanics of Materials (2100 Edition).

These three major contents are the focus of Mu Jingchi's study. After some ceremonial preparations, Mu Jingchi began to study seriously under the effect of "improving IQ" in the study.

after an hour.

Mu Jingchi frowned and put down the pen in his hand.

"The mechanics of materials in 2100 is still a bit difficult, and it is not something that I can understand at my current level."

Although he had been studying it for some time, Mu Jingchi felt that the progress was too slow.There are two reasons. On the one hand, the accumulation of mathematics and physics knowledge is not enough, and the knowledge structure system of the two has not been fully established; on the other hand, the knowledge in the 2100 version of materials mechanics has too many gaps for Mu Jingchi. .

"The development of material mechanics in 2100 also involves mathematics and physics. There are too many contents that have not been solved in the current era, but they have entered a rich application stage in that era. The gap is really too big , The knowledge gap is too serious.”

"It can only be put on hold temporarily, and the focus now is on mathematics and physics."

In the past, Mu Jingchi didn't have the idea of ​​shelving, after all, this is also the accumulation and learning of knowledge.

But not now.

Now he is the person in charge of the national research project, and he is responsible for a lot of things. He is not just a simple researcher, which is quite different from the previous situation.

The School of Materials Science and Technology of Huaqing University and the research institutes under the Ministry of Industry and Information Technology are mainly responsible for the advancement of dislocation theory, while the School of Mechanical Engineering is mainly responsible for the application of the theory.

Then the requirements for Mu Jingchi also increased accordingly. He needs to participate in various meeting topics, review various projects, participate in the analysis of various experimental results, and so on.

These feedbacks to Mu Jingchi mean that he still needs to continue to learn.

Only when he becomes stronger, can he chat and laugh happily with these scientific research leaders who are also in the project, understand their thinking, and even use his own advantages to guide the other's research direction.

With a more conspiratorial idea, I will not be used by others.

Mu Jingchi has completely absorbed the material science related to the dislocation theoretical system.But the gap between him in mathematics and physics is a bit big. In terms of mechanical analysis, elasticity mechanics, fracture mechanics, numerical analysis, engineering mathematics, mathematical physics equations, etc., Mu Jingchi is far behind the scientific research experts in the project.

"I overestimated myself. Self-study is still a bit messy. I need to go to the Faculty of Science to seek advice from the experts in the Department of Mathematical Sciences and Department of Physics." Mu Jingchi sighed, very dissatisfied with his study progress.

The next day.

Mu Jingchi came to the Science Building and found Tan Jun, a professor of the Department of Physics.

Mu Jingchi, who realized that his study efficiency was low last night, called Professor Yang Wenwu and asked him to introduce the professors of mathematics and physics in the Faculty of Science.

And Tan Jun is the leader of the physics department introduced by Yang Wenwu to Mu Jingchi.

Boom, boom, boom.

The office door was wide open, and Mu Jingchi knocked on the wooden door, attracting the attention of Tan Jun, who was reading a monograph on condensed matter physics.

Professor Tan is wearing a pair of glasses, which are of the old style from the last century, and they look retro.Although the hair is a little sparse, it can be seen that he pays great attention to appearance and takes good care of it.

It was originally a very angry thing to have someone interrupt your train of thought, but when Professor Tan saw the visitor, he laughed happily.

"Welcome, Dr. Mu."

Mu Jingchi's current status and his title are a bit embarrassing. Although the professor title arranged by the school has been evaluated, it has not been officially issued, so it is definitely not acceptable to call him Professor Mu.

Calling Xiaomu must be even more unacceptable.

Only people close to him can call him that, such as Professor Yang Wenwu.Others who want to call Xiaomu at least have good connections and enough qualifications to crush him, such as Du Cunyi.

But these two points were not reflected in Professor Tan Jun. Now that Mu Jingchi's scientific research results have begun to appear, he cannot be suppressed by his qualifications.As for the close relationship, there is no such thing. As for being older, the only identity left is the elder.

Therefore, most people call Dr. Mu directly.

Anyway, now that Mu Jingchi has officially graduated, with two certificates in hand, this title is completely fine.

"Professor Tan, you're welcome."

After Mu Jingchi came in, he didn't directly ask his own question, but chatted with Professor Tan.Starting from Huaqing University, we talked about education issues and research issues.Sometimes it reminds Professor Tan of the past, and sometimes he praises Professor Tan's education and research work.

After some conversation, the strange barrier between Mu Jingchi and Professor Tan gradually disappeared, and they became familiar with each other.

Only then did he start asking his own questions.

"Professor Tan, I came here this time to ask you to guide me in my study."

Professor Tan smiled and shook his head, "The guide is very polite, let's learn from each other, learn from each other."

Mu Jingchi didn't bother with the politeness in the words, and talked about his own problems in physics learning.

Professor Tan listened very carefully and did not interrupt casually. He did not speak until Mu Jingchi told about his self-study process, self-study experience and self-study difficulties from beginning to end.

"So, Dr. Mu, are you focusing on mechanics?"

Mu Jingchi nodded, "Isn't it right to focus on mechanics?"

From a historical perspective, mechanics is the basis of physics and belongs to physics.From a broad perspective, physics includes four major interactions, strong interaction, weak interaction, electromagnetic force, and gravity, which also belong to the category of mechanics.

But in China, mechanics and physics are separate.

This is largely due to national conditions.

After all, it has only been a few years since the reform and opening up, and the number of teachers is indeed insufficient, but scientific research and work production require talents in the fields of mechanics and physics. As a last resort, they can only be divided into two first-level disciplines.

Therefore, the current mechanics generally focus on the interaction of matter in the macroscopic field. As for the cosmos and the microcosm, they are automatically classified as physics.

The former is mainly theoretical mechanics, structural mechanics, material mechanics and elastic mechanics; the latter also has theoretical mechanics, and then thermodynamics and statistical physics, electrodynamics and quantum mechanics.

Professor Tan looked at Mu Jingchi and shook his head, "I can't say it's wrong, it's just not enough."

"If it is said that Dr. Mu is mainly in mechanical engineering, it is no problem to focus on mechanics. After all, they all use the basic principles of mechanics to solve specific problems encountered in engineering science and technology."

"But you, Dr. Mu, are different. You are engaged in material research and development, and you can also participate in the application of materials. Mechanics alone is not enough. Maybe it would be better to add condensed matter physics."

Condensed matter physics is to study the physical properties and microstructure of condensed matter and the relationship between them, that is, to understand the physical properties of condensed matter by studying the movement patterns and laws of electrons, ions, atoms and molecules that constitute condensed matter Subject.

On the one hand, it is an extension of solid-state physics, allowing the research objects to include many liquid substances in addition to solid substances, such as liquid helium, molten salt, liquid metal, and liquid crystals, latex, and polymers.

On the other hand, it also introduces a new concept system, which is not only beneficial to deal with many difficult problems left over from traditional solid physics, but also facilitates the promotion and application to some substances that are more complicated than conventional solids.

It is now gradually replacing solid state physics as a subject name, or understanding solid state physics as a synonym for condensed matter physics.

"Is that so?"

Mu Jingchi murmured, solid state physics is a professional course in material science and engineering, so he naturally learned it.This course is very difficult. Even for Huaqing University undergraduates, the average score of each test is only more than 50 points.

Solid-state physics is so difficult, and thinking about the more complex and profound condensed matter physics is simply a brain-dead behavior.

"Mechanics is biased toward applications, but condensed matter physics is biased toward theory. Combining the two should be of great help to Dr. Mu's materials research."

"Moreover, if you have a foundation in mechanics, it is not difficult to add one more condensed matter physics."

"Many things in mechanics are similar to physics. For example, continuum mechanics and electrodynamics have certain similarities, and the similarities with general relativity are not small; in addition, a lot of knowledge of analytical mechanics is also used in advanced dynamics. So the theoretical mechanics of physics will also be involved.”

After saying a few words in a row, Professor Tan Jun also felt a little dry, and took a sip of tea from his desk.

Mu Jingchi listened quietly, without interrupting the professor's speech.

"Also, many things in vibration mechanics are connected with solid physics. Many transformations in solid physics are actually quite similar to various fancy coordinates in vibration mechanics, and vibration mechanics will also consider many periodic lattices. The solution of the wave equation below. This is also very similar to the Bloch wave for electrons in solid physics."

"Fracture mechanics and plastic mechanics will involve some knowledge of thermodynamics and statistical physics, which will also help you learn physics; finite element analysis is similar to computational physics to a certain extent; both the Department of Mechanics and the Department of Physics will learn mathematical methods."

"So, what you really need to make up are quantum mechanics, quantum field theory, many-body physics, advanced solid-state physics theory, etc."

Professor Tan Jun's words were very common, and Mu Jingchi could hear them clearly.

"However, if you study mechanics and condensed matter physics together, you can't be bad at mathematics. Because the mathematical frameworks of the two are somewhat different."

"The mathematical framework in mechanics is mainly analytical tools such as calculus, complex variable functions, constant/partial differential equations, and functional analysis. But physics is somewhat different. The broad-phase mathematical framework is differential geometry, and the mathematical framework of quantum mechanics. The framework is Hilbert space, and quantum field theory involves more knowledge of group theory and group representation theory.”

"The mathematical calculation part is not difficult. The difficulty lies in the understanding of the correspondence between the mathematical framework (abstract algebra, topology, etc.) and actual physical quantities and physical equations. This is the difficulty."

Mu Jingchi could only have a helpless smile on his face, "I'm not very good at math either. I'm going to see Professor Mei later to discuss how to learn math."

(End of this chapter)