He Anzhi felt that he had pulled back a city, grinning and happy.

Gu Song hurriedly said: "Teacher, no, there are many places to ask you about model building and algorithm architecture." ”

Guo Yue raised his hand: "Don't, just remember to tell me about the progress of the paper from time to time, so that I can follow the research on the application of artificial intelligence in this field." ”

He Anzhi laughed out loud, this teacher is not like a teacher, and the students are not like students.

After a while, he felt bored laughing, and he often doubted himself in the past six months.

Has the times changed, or is it really getting old, and why is there such a big gap?

Guo Yue is his mentor, he doesn't know what he feels in his heart, and he has time to listen to him pour bitter water, and he is happy.

He Anzhi felt a little sad.

They are all scholars who have been working in their fields for so long, and suddenly they feel that their knowledge reserves are not enough.

And the source, when it comes to in-depth research, is related to the young man who made tea in front of him.

It was from his mind, as well as from his private research institute, that a steady stream of new technologies came out.

And now, the three of them are actually chatting about what the topic of his doctoral dissertation is.

Gu Song poured tea for the two of them, and then said, "After a breakthrough, you need to have a long enough time to digest and absorb it. This is also in a hurry, or shall I talk to Zhang Dong?"

"Don't!" He Anzhi was startled, "It's like I'm complaining to you." ”

Gu Song laughed: "Then you should relax today, don't think about studying it yet, let's chat." ”

He Anzhi looked at the small back garden of the main room and the cover room, listened to the sound of cicadas outside the wall, and took a sip of tea comfortably: "It's okay, take a rest." ”

……

Lin Yaodong and the others knew that Gu Song had returned, but now they wanted to wait for the small level at hand to break through before letting Gu Song come over.

Before Gu Song's visit, he came up with an idea of how to build logic circuits between different quantum gates to improve the fault tolerance rate.

But the idea is the idea, and the object is the object.

In fact, the material breakthrough of high-temperature superconducting graphene has greatly reduced the difficulty of experiments.

At the very least, each trial doesn't cost as much money and time.

However, designing quantum logic circuits always requires jumping out of the circuit design inertia of traditional computers.

After all, one is a linear operation and the other is a probabilistic operation.

Now, Gu Song has been gone for so long, they have survived the first few days without Gu Song's participation, and they are finally holding back their strength to make the first logic circuit.

Naturally, before Gu Song came, they could have stage results, and then they would have face.

After Gu Song sent Guo Yue and He Anzhi to the gate of the courtyard, he made a phone call to ask them about the situation, but was told that he would come back when we made the logic circuit, and it would be soon.

He smiled and shook his head, encouraged him and hung up.

The road to quantum computing is really long.

First of all, in the level of how to build a quantum gate, it is difficult for too many people. Optical quanta does not require superconducting materials, but the manipulation of multiple optical quantum gates is a huge difficulty.

With superconducting materials, it involves the problem of breakthroughs in high-temperature superconducting materials. At this point, I don't know how many people are stuck.

Even the graphene used now, from the perspective of cost, is not cost-effective. Because...... Graphene is too expensive.

If it weren't for Gu Song's preparation of a process that can greatly reduce the cost of graphene production, this road would have been longer.

Now, with qubits and materials to build quantum gates, how do you draw a quantum circuit diagram?

Unlike classical computers, quantum computing has an additional concept of "measurement".

The concept is complex to explain, and it is always necessary to design a quantum circuit diagram based on effective mathematical algorithms, and then through different types of quantum gates, to define the qubits carrying information as different observed states.

In this way, through the collocation between qubits and a variety of quantum gates, a quantum circuit diagram with practical value will be designed.

According to such a quantum circuit diagram, the "manufactured" quantum computer can carry out a "program" based on the algorithm logic of this circuit diagram, which must conform to the machine language of the quantum computer.

The problem is, practical value is the key.

The number of qubits that can be manipulated is partly a reflection of the quantum computer's fault tolerance.

Only when the number of manipulable qubits reaches at least one million will the error rate of quantum computers be reduced to less than 0.1%, with a fidelity rate of more than 99.9%, which can be regarded as entering the stage of fault-tolerant general-purpose quantum computers (useful error corrected QC).

And in Gu Song's original timeline, how many qubits can be manipulated by the quantum computer that claims to have achieved quantum supremacy?

54 pcs.

How much fidelity?

0.1%。

On the one hand, it is claimed to have achieved quantum supremacy by achieving 54 qubits with a fidelity rate of 0.1%.

In addition, it is necessary to manipulate millions of qubits at a fidelity rate of more than 99.9% to truly enter the stage of a general-purpose quantum computer.

What a long road!

Of course, the meaning of quantum supremacy does not mean how powerful the quantum computer is. It simply demonstrates the capabilities of a quantum computer that can achieve a specific calculation that far exceeds the most powerful supercomputing on the surface.

And on the way from 0.1% fidelity to 99%, it is not that these quantum computers are useless.

It is a special quantum computer that is specially applied to certain algorithms, especially in some fields where probabilistic operations are performed.

So, every step forward is very significant.

Now, Lin Yaodong, Ni Guangbei and Wang Suizhen are worried about the drawing of quantum circuit diagrams.

It's algorithms, materials, circuit design...... Concentrated explosion in many fields.

It was precisely because he knew the difficulty of this thing that Gu Song didn't push it so quickly.

In the long transition phase to a universal quantum computer, he had already planned the solution.

In order to prepare for the big changes after next year, it is enough to come out with the products of the first stage, which can be applied to solve some specific problems.

……

In Yenching, scholars are struggling with the technology of the future. In Port Moresby, Isaac Somaré ushered in his own real interests.

After a few days of calm thinking, he was completely persuaded by Gu Song's statement.

PNG is just a small country, and his biggest concern, layer by layer, is nothing more than fear in the face of that appalling technology.

And when he thought about it, there were many things in this world that could become his great fear, but they didn't bump into him.

Now, it's more of an opportunity.

No matter how high Isaac's heart is, he will not dream of becoming the world's first power.

So, isn't it enough to be a force to be reckoned with and stand behind a certain great power?

What's more, it is far from necessary to take sides now.

This kind of left-right thing is exactly how they are very skilled in governing the country.

In the secret negotiations with Bai Hua and Jian Yushu, Isaac's outline of the future of PNG became clearer and clearer.

Where is the biggest risk in the medium term? If this does become the center of the vortex, PNG may be exposed to gunsmoke.

But as long as his Somaray family is here and has always been strong enough, won't there be a chance to rebuild again and grasp the overall situation more deeply?

Those opposing voices, as well as a large number of uncivilized natives, were already in his heart.

After Gu Song threw out those baits in a steady stream, Isaac finally found countless reasons to convince himself to seize the opportunity.

Everything depends on how it develops in the future.

……

Since Lin Yaodong's trio came up with the results and asked Gu Song to test them, Gu Song was happy to show his presence again, and went to He Ting and Chief Engineer Ji to shake it.

Bao Jiaqi said, just do your own thing normally.

Therefore, fifth-generation aircraft and hypersonic gliding vehicles naturally have to actively cooperate.

Seeing Chief Engineer Ji, he asked with a complicated expression: "High-temperature superconducting graphene...... How did you find out?"

Gu Song was surprised: "You also know? Oh yes...... There's no way you don't know. ”

As the chief engineer of the research and development of cutting-edge defense equipment, Chief Engineer Ji will of course be able to use any new materials as soon as possible.

Gu Song smiled: "Recently, I was a little inspired, and I just took this as the topic of my doctoral dissertation, the application of artificial intelligence in computational materials science." ”

Chief Engineer Ji didn't ask about the details, and sighed nonchalantly: "The new carbon fiber, superconducting graphene, has given me a headache recently." ”

"Isn't that a good thing?

"Carbon fiber is okay, graphene, if you use it, you have to change the design, so I don't have to feel uncomfortable. ”

Gu Songle was happy: "Can this be said to be a happy trouble?"

"The new ideas you provided before the trip have verified two, thank you very much. ”

"It should. Are there any new challenges now? I have time to discuss them. ”

Chief Engineer Ji looked at him, hesitated for a moment, and then said, "Not for the time being." ”

Gu Song didn't care, so he was ready to get up and say goodbye and go back.

Then Chief Engineer Ji said: "Mr. Gu, I'm older, so I will call you a little Gu." ”

Gu Song stopped his body and looked at him suspiciously: "You just call me Xiao Gu, you should be." Did something happen?"

"The project has reached a new stage and is undergoing a confidential review and financial audit...... You, too, pay attention. ”

Gu Song was stunned, and then knew that this was the kindness of Chief Engineer Ji.

Unlike Gu Song, he is a pure technician. Maybe because of the location, you know the latest technology, but you don't necessarily know other things.

Maybe I said this because I heard a few words, valued my own role, or was in the mind of protecting my juniors.

However, confidential reviews and financial audits are normal.

Even if there is an absolute advantage, there will be a program that should be there.

Gu Song smiled gently: "Don't worry, I know about this matter, and I have talked to Commander He a long time ago." ”

Chief Engineer Ji couldn't help but stare at his head when he saw that he was confident and calm.

How long is it inside? How can everything be fine?

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