Chapter 260 Red-headed fighter, GaN radar debuts [Subscribe]

Combining quantum communication technology with drones is undoubtedly a very difficult task.

Currently, no country in the world can specifically apply quantum communication.

The global research on quantum mechanics is mainly divided into quantum computing, quantum communication and quantum measurement. In the field of quantum communication, quantum superposition and entanglement effects are mainly used to transmit information securely.

Based on the uncertainty in quantum mechanics, as well as the three principles of measurement collapse and non-cloning.

It provides absolute security guarantee for quantum communication that cannot be eavesdropped or cracked by calculation.

Therefore, if the drone can be equipped with a quantum communication system, it can avoid the signal being intercepted and interfered with, and play a greater role in performing missions.

Completely eliminate this shortcoming.

By then, quantum drones will inevitably become the enemy's nightmare.

In order to realize quantum communication, it can only be achieved through two methods: quantum teleportation and quantum key distribution.

Now that the country’s first quantum satellite has been successfully launched, a large number of scientific research experiments are still needed to verify quantum key distribution. Even if long-distance quantum key distribution is achieved, there is still a long way to go before it can be specifically applied in drones.

It is definitely not a project that can produce outstanding results in a short period of time.

Xu Yuan was naturally very clear about this, but it was something that had to be done right now.

It’s equivalent to planning for the future.

After all, the power of quantum communication is there, and regions around the world attach great importance to it.

Whoever can develop and master it first will change the world situation.

You should know that with its characteristics, it can not only be used in drones, but can also achieve full coverage, so that all information can be exchanged and a powerful quantum communication network can be built.

To achieve this, the first thing that is indispensable is to design a new system for quantum direct communication.

Regarding this matter, Jincheng Aircraft Design Institute obviously does not have the relevant qualifications.

So Xu Yuan came to Jincheng Aircraft Design Institute, and after having a detailed briefing with Liang Zhanjun, he went directly to the familiar Luyang.

……

In order to promote the construction of the National Laboratory for Quantum Information Science, the Chinese Academy of Sciences’ Institute of Quantum Information and Quantum Technology Innovation was successfully established in Luyang City this year.

The goal is to strive to establish a national laboratory for quantum information science and seize the commanding heights of development in the world's quantum information field.

Create an innovative basic platform that represents the national level and carries out the mission.

With the help of the Institute of Quantum Information and Quantum Technology Innovation, he was able to design and encode a new system for quantum direct communication.

Xu Yuan was naturally very familiar with the city of Luyang and felt like he was back home.

However, it is worth mentioning that after successfully arriving in Luyang, he did not go directly to the Quantum Innovation Institute.

Instead, he went to visit his sister Xu Ying's home first.

Because Xu Ying and her husband are both teachers at Luyang No. 1 Middle School, they live here all year round.

He was working in Yanjing, so I usually didn't see him until a year later.

This time I happened to have some project work coming up, so I definitely had to sit down and have a meal at my house.

But considering his current status, going directly to No. 1 Middle School is obviously not feasible.

If I were recognized by students or teachers at school, it would be difficult for me to leave without giving a lecture.

After all, this kind of thing has happened before.

So in the end he called his sister Xu Ying in advance.

Meet directly at home.

Seeing her younger brother coming, Xu Ying was undoubtedly very happy and asked for leave from school.

At the dinner table, apart from being concerned about Xu Yuan, Xu Ying did not ask the reason for his sudden visit to Luyang. It was obvious that she knew that Xu Yuan had a special identity and many important national projects needed to be kept confidential.

It is also worth mentioning that Xu Ying also gave birth to a big fat boy. This time when Xu Yuan came, he brought a lot of gifts for his little nephew.

But considering the project matters, Xu Yuan did not stay for too long.

After saying goodbye to my sister and her family, I took a special car to the Quantum Innovation Institute.

As a newly established institute under the Academy of Sciences this year, the Quantum Innovation Institute is located in the Hi-tech Zone.

To the south of Shuxi Lake.

The journey didn't take too long and we arrived at our destination smoothly.

He drove straight in and finally stopped under a building. Then Xu Yuan got out of the car and immediately walked towards several figures standing not far away.

Seeing that the other party also hurried over.

Soon, the two sides approached each other, and before Xu Yuan could say hello, he heard one of the middle-aged men wearing glasses say:
"Academician Xu."

"We heard that you were going to come to our institute to research a project. We were all very excited when we heard the news."

"Just waiting for you to come."

"It's a pity that I couldn't pick you up directly at the station. It's a bit regrettable."

Although Xu Yuan had never met the other party before, since he wanted to use the Quantum Innovation Institute to carry out the project, they must have communicated and contacted each other in advance.

So it can’t be called unfamiliar.

After hearing what the other party said, a smile immediately appeared on the corner of his mouth, and he answered with a warm face.

"Academician Pan, you are too polite. I was worried that I would cause trouble to you."

"We are not afraid of trouble. We are just worried about where to start." Pan Xianfeng took over the conversation and answered quickly, then took the initiative to make a gesture of invitation: "How about Academician Xu, let's go to the lounge first?"

When Xu Yuan heard what Pan Xianfeng said, he naturally had no objection.

After all, it's really not a good place to talk outside.

He nodded the next second and followed the other person to the lounge upstairs.

The other researchers and professors around us on the road also showed great enthusiasm and joy.

Everyone welcomes Xu Yuan very much.

Xu Yuan naturally understood this better and knew the current situation of the Quantum Innovation Institute.

The Quantum Innovation Institute had just been established, and even its first meeting was held not long ago.

Even many researchers were transferred from other places.

They are not very familiar with each other yet. To put it simply, they are in the running-in period.

The progress of various quantum information-related projects is not satisfactory.

As things stand now, the Quantum Creation Institute is in urgent need of valuable and substantial project results.

It just so happens that Xu Yuan is researching quantum communication technology, which will require the combination of quantum satellites and drones in the future. If it can be successfully developed, it will undoubtedly be a great achievement for the Quantum Innovation Institute.

Therefore, when Pan Xianfeng learned about this, he did not hesitate at all.

He immediately extended a warm invitation to Xu Yuan.

He even said that he would cooperate with Xu Yuan to make progress as soon as possible.

……

"Academician Xu."

"At present, all the instruments and equipment of our institute have been fully configured."

“You can start a project at any time.”

"Also, if you need assistants or project members, we have no problem with that either."

In the lounge, Pan Xianfeng talked to Xu Yuan with a smile, introducing the situation of the Quantum Innovation Institute.

At this time, several researchers nearby, and even Academician Pan Xianfeng himself, all had anticipation in their expressions.

Still a little excited.

Although they knew very well that Xu Yuan had never conducted research on quantum communication before, and logically speaking, his level of quantum communication was definitely not comparable to theirs.

You should know that the areas they are good at are all quantum information fields.

That's why I was specially transferred here.

But looking back at Xu Yuan’s resume, it is so surprising, even dazzling.

With so many examples of cross-border research projects, it is inevitable that a very strong sense of trust will arise.

I believe that since Xu Yuan dares to study quantum communication, he should be confident.

Otherwise, who would choose to do such an extremely difficult project?

"Thank you so much, Academician Pan." Upon hearing this, Xu Yuan immediately smiled and nodded in response.

He would undoubtedly be happy to see this, after all, this is not a small project.

It would be difficult for him to complete this new direct quantum communication system by himself.

Mainly looking around the world, this technology is still under research and there are no examples to refer to.

With the participation of people like Pan Xianfeng who have been conducting research in the quantum field for many years, we will undoubtedly achieve twice the result with half the effort.

It can shorten the project schedule a lot.

Pan Xianfeng's attention at this moment was obviously on quantum communication, and he couldn't pay attention to anything else at all.

I can't wait to figure out the whole situation so I can start formal research sooner.

So when the thought stayed here, he couldn't help but ask a question.

"By the way, Academician Xu, I don't know which direction you plan to start from?"

Since it has been decided to ask the Quantum Innovation Institute for help, Xu Yuan will definitely not keep things in suspense at this time.

Combining his previous theoretical research, he organized the language a little in his mind, and then began to explain it in general terms.

"At present, our quantum satellite has just been launched into orbit. If we want to conduct quantum key distribution experiments, we may have to wait for a while. So at this stage, I want to design a new quantum direct communication system that uses a mixed encoding of phase quantum state and timestamp quantum state."

As Xu Yuan finished speaking, everyone at the scene, including Academician Pan Xianfeng, quickly fell into deep thought.

The lounge suddenly became quiet.

Seeing this scene, Xu Yuan did not disturb them, but just sat in his seat and waited quietly.

It was almost ten seconds later that Academician Pan Xianfeng came to his senses first.

The expression on his face was full of excitement.

"Using phase quantum states and timestamp quantum states to perform hybrid coding to design a direct communication system." "This is simply a genius idea."

“I’m sure the new system we end up with will not disappoint us.”

While he was talking about these things, he began to feel impatient.

I can't wait to start research right now.

There is a kind of mathematician who, when he thinks of a proof for a difficult mathematical problem in the world, has to write it down as soon as possible.

The new system coding method proposed by Xu Yuan is an idea he came up with during his research at Yenching University. Although it has not been specifically verified, it is unknown what the final effect will be.

But considering that this method has pushed the progress bar up, I think even if it cannot meet the final demand, there should be some progress in the project.

However, facing such an excited Pan Xianfeng, he still gave him a shot of prevention in advance to cool him down.

So as to prevent the other party from having too high expectations.

Otherwise, if you are not very satisfied with the results, your mentality may be affected.

On the contrary, it is not conducive to subsequent research.

"The mixed encoding of phase quantum state and timestamp quantum state is just an idea I came up with."

“It’s not very mature at the moment.”

“As for the specific situation, we have to wait until this new system is designed before we can conduct quantum key distribution experiments.”

Pan Xianfeng listened to everything Xu Yuan said. Although he did nod the next second, there was no obvious change in his facial expression.

"Just arrange whatever tasks Academician Xu has. I believe the experimental results will not disappoint us."

Things have come to this point, Xu Yuan doesn't want to say more, and next he can only talk about the direct communication system and make corresponding time and work arrangements in advance.

As for what kind of results can be achieved in the quantum key distribution experiment, we will only know the details at that time.

Fortunately, he did not expect that the research on quantum communication could achieve significant results all at once.

As long as the project is steadily advanced and progress is achieved, sooner or later we will be able to master quantum communication technology, build a quantum network across the country, and usher in human civilization into the quantum network era.

Which day is still far away?

The conversation between the few people lasted for about half an hour. Later, Pan Xianfeng took into consideration that Xu Yuan had just arrived and should rest and recuperate after the long journey.

He arranged for someone to take Xu Yuan to the room.

Two days later.

Xu Yuan and Pan Xianfeng, along with several other researchers, successfully formed a quantum communication research project team.
And began to work on the hybrid coding design of phase quantum state and timestamp quantum state.

The fact that two academicians are involved in and responsible for a project shows how valuable it is.

Quantum states, unlike conventional physical quantities, cannot be copied.

Each time it is measured it may vary, resulting in different results.

If someone eavesdrops, the bit error rate will increase significantly, thus being discovered.

As for quantum direct communication, no keys are required.

By detecting the bit error rate in communication to monitor eavesdropping, the security capacity is estimated and the error correction code is selected to achieve safe and reliable communication.

It is equivalent to further enabling security features on the basis of reliable communication.

Form a new mode of reliable and secure communication under noisy and eavesdropping channels.

To achieve these things, the coding of the communication system must be able to significantly reduce the impact of noise.

This makes it highly stable and has a very low intrinsic bit error rate.

As time passed, Xu Yuan and his team made gradual progress.

However, when September came, good news came from the Fourteenth Research Institute of Jinling.

After dedicated research by Zhang Guangyi's team, they finally successfully developed a gallium nitride active phased array radar.

It can be said that almost the next second after receiving the radar test report, Zhang Guangyi told Xu Yuan the good news, and finally did not disappoint Xu Yuan's expectations.

In any case, if Xu Yuan had not solved the gallium nitride technology and enabled the country to produce high-quality gallium nitride films, the gallium nitride active phased array radar would not have been available so quickly.

After successfully developing the gallium nitride active phased array radar, the thing Zhang Guangyi was most eager to do was, of course, to conduct actual tests on the radar again.

As for the object of the experiment, it must be the stealth unmanned bomber.

At the beginning, he led the team to develop the most advanced active phased array ground radar.

I brought the radar module to Jincheng Aircraft Design Institute specifically to see the actual performance of this radar.

Because before coming, he had conducted radar reconnaissance of the domestically-produced fifth-generation stealth fighter.

With the help of the powerful performance of the ground radar vehicle, the existence of the J-20 stealth fighter can be accurately detected at a long distance.

This undoubtedly proves the advancement of the new ground radar vehicle.

With this kind of strength, if it were in actual combat, it would definitely be able to detect overseas fighter jets in a timely manner.

It is precisely because of the performance of the ground radar vehicle on the J-20 that makes him very confident.

However, when the latest stealth unmanned bomber developed by the Jincheng Aircraft Design Institute flew, the presence of the aircraft was not detected until it was very close to the radar vehicle.

It can be said that in front of this stealth unmanned bomber, the existence of ground radar vehicles has little significance.

While this test result dealt a heavy blow to Zhang Guangyi, it also strengthened his confidence in developing an active phased array radar with even better performance.

Now that the goal has been achieved, of course we have to regain the face we lost before.

Xu Yuan was very clear about Zhang Guangyi's obsession, so after receiving the other party's radar test application, he did not hesitate too much and agreed immediately.

Agree to deploy a stealth unmanned bomber to cooperate with Zhang Guangyi's team in testing the gallium nitride radar.

It must be said that Xu Yuan was also quite curious about this.

Although everyone knows that the power and performance of gallium nitride radar are much higher than ordinary active phased array radar, no one knows what the specific data is yet.

Therefore, this test is still necessary.

-

Tuesday, October 2016, 9.

The Mid-Autumn Festival is approaching, but at this moment on the runway of Jincheng Aircraft Design Institute airport, no one seems to have any desire to take a holiday.

Instead, his eyes were on the stealth unmanned bomber in front of him.

As the world's most advanced stealth drone, although it has not yet been officially unveiled to the public, anyone who sees it will be unable to take their eyes off it, and their attention will be completely attracted by the sci-fi-like fuselage.

The aircraft can be seen soaring into the sky, and new tests of its stealth capabilities will be carried out today.

The attraction is much higher than taking a holiday.

In addition, two domestically-produced fifth-generation stealth fighters are parked on another runway.

Seen from the front, the shape of the eight-winged angel is not much inferior to that of a stealth unmanned bomber.

And if you look closely, you will see that the location where the radar is placed on the nose of the two aircraft is painted red.

It is slightly different from other J-20s that are often seen.

"Xu Yuan, you must be prepared. I believe the performance of the GaN active phased array radar will surprise you."

At this time, Zhang Guangyi was standing beside Xu Yuan. He followed Xu Yuan's gaze to look at the two stealth fighters, and immediately continued speaking with a very proud look on his face.

"This time, we were a bit pressed for time. In addition to the ground radar module we brought here today, we have developed these two gallium nitride radar modules for the J-20."

"I believe that with the help of gallium nitride radar, the performance of our fifth-generation stealth fighter will be greatly improved."

Xu Yuan listened to everything Zhang Guangyi said and began to look forward to the next test.

The original domestically produced fifth-generation stealth fighter was known for its high-power active phased array radar, and its radar performance was completely superior to the overseas Raptor.

This makes the J-20 the most advanced stealth fighter in the world, and it shocked the world when it first appeared in public.

Now that the airborne radar has been upgraded again, if nothing unexpected happens, the overall performance of the fighter will be far ahead.

Since the stealth unmanned bomber has not yet been publicly unveiled, it would certainly be inappropriate to announce the use of gallium nitride radar to make overseas countries afraid to act rashly.

It just so happened that Zhang Guangyi and his team also upgraded two stealth fighter radar modules.

So we decided to conduct radar tests together.

When the J-20 with a red nose makes its debut in the world, I believe it will cause quite a stir.

Let the world know what true radar fault leading is.

"It seems that Academician Zhang is very confident this time." Xu Yuan retracted his gaze and laughed as he made a joke.

Upon hearing this, Zhang Guangyi said without reservation: "With the help of Academician Xu Da in solving the gallium nitride material problem, I am of course confident in this gallium nitride active phased array radar." He looked very confident.

But just as he finished speaking, a familiar voice suddenly came from behind him.

"That's hard to say, Academician Zhang. We have recently upgraded the stealth coating on the fuselage of the stealth unmanned bomber, so the stealth effect of the aircraft should be improved."

Hearing the voice, Xu Yuan and Zhang Guangyi subconsciously looked back and found that it was Liang Zhanjun who was walking towards them with a smile.

There was also a confident smile on his face.

Since the successful first flight test of the stealth unmanned bomber, the institute did not immediately launch new projects.

Mainly studies the anti-interference capability of UAVs.

However, stealth coating materials are developed and provided by other organizations, and their stealth and wave-absorbing properties have been continuously improving. For example, the newly developed fifth-generation stealth fighters and stealth unmanned bombers all use stealth coating materials with better wave-absorbing and stealth effects.

This is the case with the stealth unmanned bomber on the runway right now.

That's why Liang Zhanjun said that.

Xu Yuan naturally knew about this situation, but he had not thought about it before.

After being reminded by Liang Zhanjun, he couldn't help but feel a little worried about Zhang Guangyi.

But Zhang Guangyi didn't take it to heart and still responded confidently.

"No matter how stealthy your aircraft is, it will be invisible to our radar detection."

Then, seeing that it was almost time for take-off, he did not stay any longer and immediately went to the radar control room to take charge.

Xu Yuan looked at Zhang Guangyi's leaving back, then smiled, shook his head and looked away.

After noticing that Director Jia Yueguang had also arrived, he immediately looked at Liang Zhanjun beside him and said:
"It's almost time, so let's officially start today's test. I hope it will surprise us."

……

(End of this chapter)