Xu Chuan entered his office to study things, and Fan Pengyue didn't care about it at first, thinking that he would be able to come out soon.

As a result, it was not until the next day, when he was in a meeting, that he suddenly remembered this.

I took out my mobile phone and made a call, only to find that the little junior brother had run back to his villa.

In the study, Xu Chuan hung up the phone, looked at the manuscript paper on the table, which was already full of dense characters, and continued the research at hand.

The inspiration has been grasped, and he wants to directly refine this set of theories in one go.

Considering the regular placement of the dopant in the lattice of the space group (SG), which reduces the symmetry to CUC143, the double-band and four-band models are characterized by symmetrically strengthened double Weyl points at $\Gamma$ and A."

"Due to the non-trivial multi-band quantum geometry characterized by mixed orbitals, as well as a singular flat band. The excellent agreement of the high-temperature copper-carbon-silver composites with Cu atoms to form magnetic traps in density functional theory (DFT) calculations provides evidence that the minimum topological bands of the Fermi level can be achieved in doped materials. ”

"Theoretically, this is enough to provide a basis for building topological quantum materials."

Looking at the words on the manuscript paper, Xu Chuan's eyes showed a hint of satisfaction.

After three days of forgetting to sleep and eating and staying up late, he grasped the occasional inspiration, spread it out and extended it in an all-round way, and incorporated the topological state of matter on the basis of the theory of the large unified framework of strongly correlated electrons.

Exploring the generation mechanism and characteristics of topological states in strongly correlated systems provides a theoretical basis for the realization of new quantum devices.

Although there is still a long distance between theory and application, with the guidance of the theoretical foundation, the direction of application is clear.

It is like a ship sailing on the sea that has encountered a storm, and in the midst of waves and hurricanes, it sees the bright lighthouse on the edge of the coast, and has a clear direction of progress.

Stretching in satisfaction, Xu Chuan stood up and moved his muscles.

There was a crackling sound of bones, and he snapped his fingers, sat down again, and sorted out the manuscript paper on the table.

The study of the generation mechanism and characteristics of topological states of matter can be regarded as a continuation of the theory of the large unified framework of strongly correlated electrons.

But this research paper, he probably won't send it out.

Because the importance is quite high.

Papers that provide a theoretical basis for the construction materials of quantum chips, no matter which country they are issued, are the objects of national key secret research.

After sorting out the manuscript paper and putting it in a drawer, Xu Chuan leaned back in his chair and stared at the bookshelf not far away.

With his research paper on the mechanism and characteristics of topological states, the development of quantum computers should be able to speed up the pace.

The development of quantum chips and quantum technology is the trend of the future, and it is also a shortcut for Huaguo to achieve corner overtaking in the field of chips.

As for traditional silicon-based chips, to be honest, there is little left in this regard.

It's not just that Western countries led by the United States have been working on silicon-based chips for decades and have established a complete set of rules and advanced lithography technology, resulting in other countries can only catch up and cannot surpass it; There are even more reasons why silicon-based chips are almost coming to an end.

Traditional chips have always been based on silicon materials, but with the continuous improvement of chip technology, silicon-based chips are gradually approaching its limit.

At present, AMSL, TSMC and other companies have achieved the ability to produce three-nanometer or even two-nanometer chips.

But for silicon-based chips, further down, one nanometer is its theoretical limit.

The first reason is that the size of the silicon atom is only 0.12 nanometers, and according to the size of the silicon atom, once the chip process reaches one nanometer, it is basically impossible to fit more transistors.

Therefore, the traditional silicone grease chip has basically reached the limit, and if more transistors are forced to be added after 1nm, the performance of the chip will have various problems.

The second reason is the quantum tunneling effect, which is the biggest factor limiting the development of silicon-based chips.

The so-called tunneling effect is simply a phenomenon in which microscopic particles, such as electrons, can directly pass through an obstacle.

Specific to the chip, that is, when the process of the chip is small enough, the electrons that originally flow normally in the circuit to form the current will not flow honestly according to the route, but will pass through the semiconductor gate, string everywhere, and eventually form various problems such as leakage.

To put it simply, it's like a person has learned to go through a wall and go straight from one side of the wall to the other.

In fact, this phenomenon does not refer to the effect that occurs when silicon-based chips reach one nanometer.

In the past, when the chip reached 20 nanometers, the silicon-based chip had this leakage phenomenon.

It's just that some chip manufacturers, including TSMC, have improved this problem through process improvements.

Later, between 7 and 5 nanometers, this phenomenon reappeared, and ASML solved this problem by inventing the EUV lithography machine, which greatly improved lithography capabilities.

However, in the future, as the chip process becomes smaller and smaller, when the traditional silicon-based chip reaches 2 nanometers, various problems caused by the quantum tunneling effect will gradually be exposed.

When it comes to the signs of one nanometer, even if some chip manufacturers can break through this barrier, the overall chip performance will not be excellent in theory, and it will not even be too stable, and various problems may occur.

Perhaps in the process, scientists will come up with various ways to solve this problem.

But the limitations of silicon-based materials are there, and its development potential is limited.

And finding an alternative material, or developing other discovered computers, is what the chip and computer industry has been doing.

Quantum chips and quantum computers are undoubtedly the most important part of the future development route.

In this regard, even carbon-based chips, which have the greatest potential to replace silicon-based chips, are slightly less important.

After all, today's quantum computers have built a fairly complete theoretical foundation, and even realized the physical computer that controls two-digit subbits, and the future is bright.

The trouble lies in how to manipulate the qubits and store the information.

The mechanistic paper on the mechanism and characteristics of topological states in his hands can solve this problem to a large extent.

This means that quantum computers can manipulate bits, ranging from three to four digits.

Don't look at the tens of billions of transistors in the chips of traditional silicon-based computers, and the number of qubits sounds pitiful.

But in reality, the two cannot be compared at all.

If you insist on PK, then the computing power of a 30-qubit quantum computer is about the same level as a classical computer with trillions of floating-point operations per second.

The computing power of a quantum computer rises exponentially with the manipulation number of qubits.

Scientists estimate that a 100-bit quantum computer will be able to surpass the most powerful supercomputer in existence when it comes to solving certain problems.

If the computing bits of the quantum computer can be increased to 500, then this computer will beat all the current supercomputing in all aspects.

Of course, these are all theoretical, as for the specific actual situation, we do not know it for the time being.

However, the prospect of such an alluring theory has naturally attracted the attention of countless countries and scientific institutions to this point.

Xu Chuan is no exception, especially now that he still has such a big killing weapon in his hands.

It's just that what he's thinking about is whether to cooperate with the country to develop the field of quantum computers together, build rules, and control quantum hegemony, or continue to study it himself.

Each has its own advantages and disadvantages, and it is indeed difficult for people to choose.

After thinking for a while, Xu Chuan shook his head and threw the thoughts out of his mind.

Let's take one step at a time. With the development of quantum computers, he doesn't have much time to do it at the moment.

Miniaturized controllable nuclear fusion technology and aerospace engines have not yet been completed, and the main focus at present is to focus on this first.

After cleaning up the mess on the desk, Xu Chuan stood up, took a shower, and rushed to the Chuanhai Materials Research Institute.

Superconducting materials with high critical magnetic fields have been supported by data in simulation experiments, and the next step is to prepare them through real experiments.

Originally, this work should have started three days ago, but he studied in the villa for three days because of some unexpected inspiration, but Fan Pengyue did not receive instructions and did not dare to start without permission, so it dragged on for three days.

However, Xu Chuan didn't care too much, the three days were completely worth it.

After entering the laboratory and changing into work clothes, he hired two formal researchers as assistants and personally began to prepare high-temperature copper-carbon-silver composite superconducting materials with the introduction of a strong anti-magnetic mechanism.

In the preparation of this improved superconducting material, there is not much difference in the steps in the early stage.

Raw materials with high purity, good crystal structure and controllable particle size are manufactured by vacuum metallurgical equipment, which is the basis for the preparation of copper-carbon-silver composites.

Subsequently, the prepared nanomaterials were sputtered on the SrTiO3 substrate by using RF magnetron sputtering equipment to form a thin film.

And from here, it was the turning point.

In the original high-temperature copper-carbon-silver superconducting materials, multi-walled carbon nanotubes (CNTs) with 2% volume fraction and carbon nanotubes modified with Cu coating need to be added as the reinforcement phase.

However, in strengthened superconductors, it is necessary to introduce excess Cu nanoparticles at the same time, and guide the Cu atoms to form spins through current stimulation under high temperature and high pressure conditions, and form orbital hybridization with C atoms to improve the structure of the material surface.

The main purpose of this step is to dope the Cu atoms in the excess Cu nanoparticles into the holes, and then produce non-trivial quantum phenomena and promote the generation of magnetic traps.

To put it simply, the generation of magnetic traps requires external supplementary energy, and high temperature, high pressure and conduction are the means of supplementing and adjusting the spin angle of Cu atoms.

This is one of the commonly used methods to optimize the properties and microstructure of nanoscale materials and superconductor materials.

In addition to high temperature and high pressure, there are also methods such as osmotic growth, solution method, vapor deposition method, and physical deposition method.

However, due to the need for additional energy, these methods are probably not suitable for superconductors that strengthen the critical magnetic field.

If the high-temperature and high-pressure guidance method is not suitable for improved superconducting materials, the only way left is probably to complete it through an ion implanter.

However, the energy level of the ion implanter is too high, which will damage the superconductor to a large extent, reduce the performance, and industrial mass production is also quite troublesome.

After all, this is the preparation of raw materials, not the production of semiconductors, and the cost performance and preparation difficulty must be considered.

PS: There is one more chapter in the evening, ask for a monthly pass!

(End of chapter)