Research starts with PhD students

Chapter 147 Characteristics of Time, Edward Witten, a more professional person in theoretical physics!
After the academic report work in the morning was finished, everyone went to the school cafeteria.

There was a two-hour break at noon, which was relatively relaxed. The dozen or so judges sat very close to each other. They were all relatively prestigious scholars at Soochow University and outside the school.

Zhang Shuo, Luo Yongjun and Yan Chongwen came together and they found a table for four and sat down.

Qi Zhixiang was at a nearby table.

Others also came in this direction. As the person in charge of the seminar, Qi Zhixiang naturally had to greet them politely, and then he understood Wang Hui's feelings.

Many people just exchanged a few polite words with Qi Zhiqiang and didn't want to say anything more, so they just gathered around Zhang Shuo.

Some people simply ignored Qi Zhiqiang and just came over with chairs.

The purpose of their coming to the seminar was for Zhang Shuo.

Some of them came simply to meet Zhang Shuo and attend a seminar on nonlinear partial differential equations. They were very curious about Zhang Shuo because he had achieved amazing research results at a very young age.

Some are for research.

It includes the study of numerical simulation of NS equations and the numerical solution of fermion Hubbard model.

The latter is more attractive.

The numerical simulation of the NS equations has a great influence, but because the research has been very in-depth, it is extremely difficult to expand on its basis.

The numerical solution of the fermion Hubbard model is different.

The core of this method is the infinite multiple discretization method. If this method can be used on other complex mathematical models, it means that other mathematical models can also be solved numerically.

This is equivalent to opening up a new research field.

During the meal, Yan Chongwen exclaimed, "It really opened up a new field."

“Most mathematical models cannot be solved numerically, especially those related to physics research, which are very complicated even for analysis.”

"How to apply the infinite multi-separation algorithm to other mathematical models may become a research direction chosen by many scholars..."

Yan Chongwen talked about the significance of the research and continued, "The Superconductivity Laboratory highly respects this research."

"Many of their experiments require solving the fermion Hubbard model, and some of their experiments are unique in the world. It can be said that they are at the forefront of superconductivity mechanism research."

"Your research will greatly promote their experimental analysis. Perhaps they will publish a series of results in the near future."

“Of course, this is also true internationally.”

“It has a far-reaching impact!”

Yan Chongwen also introduced a researcher named Su Zhiguo to Zhang Shuo.

Su Zhiguo was a little reserved. It took him a long time to say, "Professor Zhang Shuo, do you remember our discussion online? Experiments, solutions to the fermion Hubbard model?"

"Oh~~~"

Zhang Shuo suddenly realized, "Are you the netizen I was discussing with you?"

"My name is Su Zhiguo, a researcher in the Superconductivity Laboratory." Su Zhiguo shook hands with Zhang Shuo and immediately acted much more casual.

Yan Chongwen and the others looked a little surprised, "You guys also discussed the issue online?"

Su Zhiguo explained, "Do you remember the public opinion about the fermion Hubbard model on the Internet? I was the first netizen who discussed it with Professor Zhang Shuo."

"I just had a few words with Professor Zhang Shuo. I never expected that he would complete the numerical solution research so quickly..."

"This is such a misunderstanding!"

Zhang Shuo quickly clarified, "This research has already started, so we can say with certainty that a numerical solution can be obtained. The research was almost completed at that time."

The others suddenly understood.

They talked about this topic for a few words, and then Su Zhiguo asked a very professional question, "The numerical solution of the model can indeed solve many experimental calculation problems, but is there a way to make these numerical values ​​coherent?"

"You mean... numerical simulation?" Zhang Shuo asked with understanding.

Su Zhiguo said, "It is not necessarily a numerical simulation. Because the solution method is very complicated, we can only perform specific solutions for the experimental points. The points obtained are not coherent, and it is difficult to find a coherent position."

"For a single experiment, the movement of electrons is not very clear. What I mean is, is there some way to determine the time properties of the numerical set of the model being solved?"

Time nature.

This word appears very rarely, but in the research field of superconducting mechanisms, it is also very important to control the properties of calculation time in experiments.

The mechanism of superconductivity studies the motion characteristics of electrons.

Electrons are particles that exist at the microscopic level, unlike real objects whose positions can be used to determine the time before and after.

For example, electrons move around the nucleus.

The positions of the electron when it rotates 1/2 circle and 3/4 circle are measured at the same time, so the question is - which one comes first and which one comes later?
This is difficult to judge.

A simple example involves the undeterminable time logic, which is also the key to Su Zhiguo's question: Is it possible to use numerical solutions to determine the time properties of the model's calculations?

Zhang Shuo thought about it for a long time and still gave an uncertain result. "I think it is difficult to make a judgment on time just by solving the model."

"If you want to really make this kind of judgment, you still have to conduct numerical simulations of the experiment."

"What I said may not be right."

Zhang Shuo explained, "I have not participated in the research on superconductivity mechanism, and I don't understand some of the experimental contents."...

The academic conference will continue.

Zhang Shuo took a fancy to several studies and went to listen to the reports one by one according to the schedule.

Some of the research made him feel very rewarding.

For example, there are studies of singularity arguments for several specific types of nonlinear partial differential equations.

These equations are very simple compared to the NS equations, but Zhang Shuo also gained a lot from the content of singularity proof.

In addition, there are two smoothness arguments for special equations.

From boundary function mapping to smoothness research, the methods and argumentation process used have given Zhang Shuo a deeper understanding of research methods.

In two days, the task progress increased by '2.3%'.

This speed can be said to be quite fast. When he was doing research himself, the average daily increase was only 0.1%.

It has now risen by 2.3% in two days, which is ten times faster.

"I still need to attend more similar seminars..."

Zhang Shuo sighed.

If you do research on your own, even if you are stuck and use "氪币" operations, it will take about three years to complete.

By attending more similar reports, the progress of the task will be improved rapidly, and the research will definitely take less time.

The third day was mostly work reports.

The main purpose of this day was for scholars to exchange ideas on methods, research directions and problems encountered in studying non-linear partial differential equations.

On the same day, Zhang Shuo also heard good news from the Computing Center of the Institute of High Energy Physics.

The Computing Center's large-scale experimental deviation analysis algorithm project has completed the initial testing of the core algorithm.

Many problems were found during the testing process, but most of them were program errors and there were no problems with algorithm logic.

If the test goes smoothly, the large-scale experimental deviation analysis algorithm will soon take shape. Generally speaking, the algorithm project can be completed in one to two months at this stage.

At that time, it will be possible to perform digital deviation analysis on large-scale particle collision experiments.

Zhang Shuo also asked about the CP team's equipment transformation work, and the information he got was that the equipment transformation work would take some time.

This answer is about the same as "indefinitely".

The lack of a definite completion date means that the renovation work may encounter difficulties.

Zhang Shuo decided that after the seminar, he would ask the CP group about the problems they encountered in the equipment modification. He was still looking forward to the strong electromagnetic interference hyperon decay experiment, but did not want to delay the progress of the experiment due to problems encountered in the equipment modification.

……

As the last day of a workshop on nonlinear partial differential equations approached, almost no one noticed that a new issue of the international physics journal Physical Review Letters had been released.

Physical Review Letters (PRL) is the world's top physics journal.

Since its founding in the 50s, Physical Review Letters has continuously published groundbreaking research by Nobel Prize winners and other outstanding researchers in the field of physics, and has become the journal that publishes the most Nobel Prize-winning physics papers.

Over the past 40 years, more than 65% of all Nobel Prize-winning research published has been published in journals.

It is said that as long as you publish a paper in it, you will be eligible to work in any university.

Many of the top international physics research are submitted to Physical Review Letters, not Science or Nature.

For example, Gravitational Wave Detection.

After this research was published, the researchers quickly won the Nobel Prize in Physics.

It is naturally very difficult to publish a paper in such a top journal, and the review process is also very strict.

Zhang Shuo's paper encountered the problem of difficult review. Perhaps it should not be called review, but the editor who did the initial review could not understand it and did not know what level the content was at.

The paper he submitted was titled "Electromagnetic Force and Chaotic Force Field - Unknown Physical Phenomena in Particle Collision Experiments."

This is a study in theoretical physics.

It is the most difficult to publish theoretical physics papers in any academic journal in the field of physics, because theoretical physics has no experimental support, and theories that have not been observed and confirmed are not strictly speaking physical knowledge.

Such research is difficult to convince reviewers of experimental physics.

If it were any other submitter, a theoretical physics research that was incomprehensible and could not be broken down into levels would probably be rejected directly.

Zhang Shuo is different because he is very famous.

The editorial department of Physical Review Letters had also heard of Zhang Shuo's name.

They found two outstanding physicists as reviewers, and after studying the paper for a long time, they still could not make a judgment.

Eventually, they decided to hand the paper over to a more professional person - Edward Witten, a semi-retired professor at Princeton University.

(End of this chapter)