"How are we going to conduct this four-degree-of-freedom experiment?"
"With four degrees of freedom, can we already go to the moon?"
"It might work?"
In the laboratory, everyone looked at the new device in the middle with curious eyes on their faces.
After all, this is four degrees of freedom!
In fact, in the past month, they have carried out the second ultra-long-distance experiment on the previous three-degree-of-freedom observation device. This time, they directly crossed the horizon and crossed the sea level, starting from the highest point in China.
From the northern end to the southernmost end, there was a distance of 5,500 kilometers for measurement, and the final result was still very gratifying because they succeeded.
Obviously, this is a very amazing result. The direct communication of 5,500 kilometers is much better than their previous method of placing a relay station every other city and then spanning dozens of cities to achieve communication between the capitals of several provinces.
too much.
This means that no matter where in the country, confidential information can be transmitted directly through quantum communication.
The most important thing is that it is communicated directly and does not require the use of quantum satellites.
The biggest problem with quantum satellites is that they float in the sky and cannot achieve effective defense. If war really comes one day, then obviously the other party can try to directly destroy the quantum satellites. In this way, the quantum communication they have built before will be completely destroyed.
The main line is simply wasted.
Of course, their Mozi had actually considered this kind of thing at the beginning, so the satellite orbit where the Mozi is located is a sun-synchronous orbit, which is far enough from the earth. It would be difficult to attack the Mozi.
It's still pretty big.
However, although it is difficult, they have to take precautions against this matter, so direct communication on the ground is more stable.
But now that they have achieved direct quantum communication spanning 5,500 kilometers, this problem is naturally no longer a problem.
Therefore, from a strategic perspective, this will completely ensure the security of their information, and they will no longer have to worry about information leaks and other issues.
Of course, 5,500 kilometers is only the limit of what they are currently measuring. This does not mean that it has reached the limit of the three-degree-of-freedom observation device. Therefore, they still have the opportunity to achieve longer-distance measurements.
Originally, they did have this plan. They were going to cooperate with both the Navy and the Air Force. Then they would let the Navy sail to the high seas, and then they would go to the mainland and cross tens of thousands of kilometers to see if they could achieve contact.
The Air Force is asking the Air Force to try it in the sky to see if Air Force aircraft can achieve quantum communication with the ground while moving at high speed.
However, none of them expected that Lin Xiao would come up with this four-degree-of-freedom observation device so quickly.
The three-degree-of-freedom observation device was born less than three months ago and has become an outdated technology.
Although I was very surprised that Lin Xiao achieved another technical breakthrough so quickly, I had no choice but to accept it now that it was all done.
So now they had to start discussing how to conduct the experiment.
But it made them both laugh and cry. Now they actually don’t know how to conduct the experiment?
If they conduct another experiment, they may have to conduct tests from the North Pole to the Antarctic.
"Perhaps, now we should go to the space station for an interview?"
Someone couldn't help but ask.
"This makes no sense." The other person shook his head and said, "After all, the Mozi is in the sky."
"That's true." The person who made the suggestion thought for a while and finally nodded.
really.
The sun-synchronous orbit where Mozi is located is 1,400 kilometers away from the earth at its farthest point, but it is far further than their space station.
The orbit of their Tiangong Space Station is only over 400 kilometers away from the earth, far less than 1,400 kilometers away.
As for why Mozi can achieve 1,400 kilometers of quantum communication, it is actually because of quantum decoherence. On the surface of the earth, the speed of quantum decoherence is extremely high, which also causes their direct quantum communication on the surface of the earth to be greatly affected.
Obstacle, if it can be hundreds of kilometers, it would be good, so the current direct communication of 5,500 kilometers surprises them so much.
In the universe, since it is basically void and there is almost no environmental interference, the impact of quantum decoherence is greatly reduced, and longer-distance communication can naturally be achieved.
It is precisely because of this that they have the courage to challenge the 30,000 to 400,000-kilometer gap between the earth and the moon, having achieved only a few thousand kilometers of communication on the earth.
But unfortunately, the size of the earth has now become an obstacle to their experiments.
After all, the diameter of the earth is only more than 10,000 kilometers, and they have already achieved 5,500 kilometers in three degrees of freedom. Now they have four degrees of freedom. Can't this distance be multiplied by 2?
So now, they don't know how to do it well.
"Lin Xiao, what are your plans?"
At this time, Pang Wei in front asked Lin Xiao.
Obviously, Lin Xiao still needs to make this decision on this point.
At this time, Lin Xiao was also thinking about how to conduct the experiment next?
They have determined the feasibility of the four-degree-of-freedom observation device. After experiments, they have shown that this four-degree-of-freedom observation device can transmit information. The next step is to verify the long-distance transmission of information by this device.
But now it seems that I may not be able to go to the moon.
So in the end he thought about it and said, "That's it. Next, you can try to increase the number of transmission bits. In addition, try to see if communication from the North Pole to the South Pole can be achieved."
"Well, I understand." Pang Wei nodded without any objection. After all, these are the only two things they can do now.
From the North Pole to the South Pole, they are the two farthest points that can be achieved on their earth.
As for the other item, increasing the number of bits transmitted is related to how much information they can transmit at one time.
After all, quantum communication is not like the current network, which can transmit a large amount of information. The size of the information that quantum communication can transmit is limited by its entangled quantum. Therefore, only by increasing the size of the information that can be transmitted can its effect be improved. Otherwise,
If only one bit of information can be transmitted per second, it might as well be transmitted directly using radio waves.
This is equivalent to a person living in the countryside. Although he is connected to an advanced network, the upload speed is only 1B per second, so when he wants to transfer a G file to a nearby city, he might as well directly
Copy this G file to the USB flash drive, and then send the file directly there on horseback.
Therefore, it is also very important to increase the number of bits that can be transmitted per second.
"What about you? What are you going to do?"
Lin Xiao smiled and said: "I have to help them speed up the date of the next manned moon landing plan."
Pang Wei was stunned, "Speed up? How do you want to speed up?"
"Of course I'm going to help them research a spacecraft that can sail to the moon."
"What, a spacecraft?"
Pang Wei's eyes widened immediately. Lin Xiao had just developed this four-degree-of-freedom quantum entanglement observation device, and then turned around to study the spacecraft?
And according to Lin Xiao, it is still the kind of spacecraft that can go to the moon.
How dare he plan to directly launch a moon landing plan in order to test this four-degree-of-freedom observation device?
Why does this give Pang Wei the feeling that he is making dumplings for a plate of vinegar?
Of course, if he knew Yue Shisi, he would definitely not think so.
Because Lin Xiao obviously studied this quantum communication technology in order to go to the moon.
"Yes, spacecraft. Otherwise, if the moon was so expensive last time, they would definitely not be willing to play like this."
Of course, Lin Xiao did not explain anything to Pang Wei. He spread his hands and then said to Pang Wei, who still looked surprised: "Okay, you will be able to arrange the rest. It's time for me to go back to Beijing."
"Of course, you should not forget that our project is not completely over yet. After all, the goal of our project is five degrees of freedom."
Pang Wei came back to his senses from Lin Xiao's words just now, and finally said helplessly: "Okay, I understand, you can go ahead and leave the rest to me."
Lin Xiao smiled slightly and said, "Okay, that's it."
Then he turned to look at the other researchers in the laboratory and said with a smile: "Thank you all for your hard work during this period. Let's meet again at the next point before success."
Other researchers had just heard that Lin Xiao was going to study the spacecraft. At this time, their faces also had various surprises and envy. After hearing Lin Xiao's farewell words, they also all
He quickly waved his hand and said, "It doesn't matter if it's hard work or not, it's all Chief Lin who worked hard."
Lin Xiao smiled, and then said no more. After saying goodbye again, he left the laboratory. Next, he would seize the time to start research on aerospace aircraft.
Others couldn't help but sigh when they looked at Lin Xiao's resolute back.
"Maybe Chief Lin is the only one in the world who can study quantum communications and spacecraft at the same time, right?"
"Sometimes it's so hard to imagine..."
While they were all sighing, Pang Wei said: "Okay, let's follow what Chief Lin said and start increasing the bit transmission size. At least, before the next moon landing plan, we must achieve at least one bit per second.
The transmission speed is 10,000 bits. Otherwise, when the time comes, transmitting a photo will not be as fast as wireless telegraphy.”
"yes!"
The researchers present immediately responded.
"In addition, contact the navy that we have cooperated with before, as well as the scientific research stations in the Arctic and Antarctic. When the time comes, we will go to the two poles to conduct experiments together."
"By the way," Pang Wei paused for a moment, then smiled and said, "Take a trip."
The researchers present immediately cheered, and then returned to their posts and began the next research work.
…
Time passed quickly.
After Lin Xiao left the Quantum Physics and Quantum Information Research Department, he packed his bags and returned to Beijing.
Next, he will start research on aerospace aircraft, so he will naturally need relevant help.
Of course, the most critical thing is the place where the experiment is conducted.
So, with a big mouthful, he asked for a huge sum of money to build the Dingguang Aerospace Research Institute.
This huge amount of money is as high as 4 billion, because Lin Xiao's aerospace research institute must not only have indoor experimental sites and instruments, but also an outdoor experimental site.
As for his outdoor experimental site, it is an airport runway that is long enough and large enough.
The largest aircraft in the world, the An-225 transport aircraft, weighs 640 tons. If it wants to take off, it needs a 3,500-meter airport runway to take off.
The Long March 9 carrier rocket has a maximum take-off weight of more than 4,000 tons, which is nearly seven times that of the An-225.
As for the aerospace plane, which is both an airplane and a spacecraft, it is naturally impossible to be smaller than the An-225 in terms of mass. Of course, it is not necessarily larger than the rocket, because more than 80% or even 90% of the rocket is
It's fuel.
Because the aerospace plane can take off with the help of air buoyancy like an airplane, it can replace nearly two thousand tons of rocket fuel with hundreds of tons of aircraft fuel. After all, even the An-225 only needs 300 tons of fuel.
Already.
Of course, because of the greater weight, the take-off runway required by the aerospace plane is also longer.
Therefore, the runway Lin Xiao plans to build must first be very long.
According to his calculations, it would need to be at least 8,000 meters long. Of course, just in case, he decided to build a 10,000-meter runway.
So, he asked for so much money at once.
Of course, the higher-ups also knew that he was doing it for Yue Shisi. In addition, the aerospace plane was not only meaningful for exploring the moon, it was also very important strategically.
After all, once the aerospace plane is realized, it means that they will have the ability to strike from orbit, and this kind of strike has almost no solution.
Therefore, investing billions of dollars is totally worth it from the above point of view.
So in the following time, Lin Xiao began to prepare for the Dingguang Aerospace Research Institute, including site selection, related facilities, etc. The research institute and the runway were built together. The estimated time required is six
months.
If this time had been put back in the past, a 10,000-meter-long airport runway would have taken far longer than six months to complete. However, as the first area to enjoy the dividends of controllable nuclear fusion, Shangjing has to build this kind of infrastructure.
The speed has already been greatly improved, not to mention that it is still a project that Lin Xiao wants to carry out.
As long as the balance payment is made in time, let alone six months, there is no problem if it is faster.
In this way, the site was determined, somewhere on the outskirts of Shangjing, and then Lin Xiao waited for the construction of the aerospace research institute and the 10,000-meter-long aerospace runway.
Of course, it was impossible for him to supervise the construction every day. It was better to leave this kind of thing to the people below, and he put his thoughts into the design of this aerospace plane.
Time also passed slowly.
…
Until one month later.
"How should I design this thing..."
Lin Xiao lowered his head, looking at the design drawings in front of him, thinking in his heart.
The design drawing in his hand is a design sketch of an aerospace aircraft obtained from Tan Jinri. It is a structure temporarily designed by the Space Administration and the Moon and Stone Division.
However, it is obvious that this structure cannot meet their requirements, because in the computer simulation process, the fuel consumption of this structure is too high. In addition, there are also the aerospace engines that need to be switched during the process of switching from aviation mode to aerospace mode.
If the time is too long, there is a 50% chance that danger will occur during the switching process.
"Too much fuel consumption?"
Lin Xiao touched his chin. Especially during the take-off stage, aviation fuel consumption is relatively large. After all, who made this structure designed to take off with a total capacity of up to 2,000 tons.
This problem is quite easy to solve for him.
"Xiao Mi, based on the general solution of the Navier-Stokes equation, optimize the aerodynamic design of this thing." He said.
"Good master."
Xiaomi's voice sounded from the computer, and after a moment, Lin Xiao saw a brand new structure coming out.
Looking at this new structure, Lin Xiao nodded slightly.
This new structure optimized by Xiaomi based on the general solution of the Navier-Stokes equation must be basically perfect in terms of aerodynamics.
But the final problem still has to fall on the aerospace engine.
"It would be nice to have a material that was strong enough in both hardness and heat resistance."
Lin Xiao thought for a while, and then said to Xiaomi again: "Xiaomi, list all the materials on the earth that rank in the top ten in terms of hardness and heat resistance."
"Okay." Xiaomi responded, and the next moment, Lin Xiao saw a form pop up on the computer, which contained exactly the materials he wanted.
These materials also include materials secretly researched by various countries.
But when Lin Xiao saw the material ranked first, he was immediately shocked.
"Good guy, carbyne sulfide is only 40 times as hard as diamond, but this thing is actually 800 times as hard as diamond? What the hell is this?"
"And this heat resistance is actually as high as 10,000 degrees Celsius? No... it says greater than 10,000 degrees Celsius, which means it has not been tested to the limit?"
Seeing this material, Lin Xiao was shocked and even wondered if Xiaomi had found the material from some completely unreliable science fiction.
But when he looked ahead, he was stunned because the name of this material was clearly introduced earlier, called [Moonstone Surface Material (Powdered)].
"The surface material of the moon monument? Xiaomi, did you get this material from the Moon Stone Division?"
"Yes!" Xiaomi replied.
Lin Xiao immediately realized that he had missed something.
At the beginning, the three material science academicians of the Moon and Stone Division invited him to study the materials of the moon monument, including Liao Cheng, the director of the Moon and Stone Division, who also suggested that he study the materials of the moon monument. However, at that time, he was obsessed with being
The news of the moon monument was too surprising, and coupled with the discovery of the Mars by the United States, he was immediately focused on landing on the moon first and then on the fire, so he ignored this matter.
As a result, I didn't expect that the material of this moon monument actually has such extraordinary properties.
So immediately, he took out his mobile phone and was about to call one of the three academicians.
But after thinking about it, if I asked him directly, they might wonder where they got the news.
So he gave up the idea and got up. He wanted to go directly to Yueshi Division.
…
A few hours later, he arrived at the Yueshi Division, took the elevator that was a hundred meters deep, and came to the headquarters of the Yuesi Division at the bottom, where he met the three academicians.
"Eh? Why are Chief Lin here? Haven't I heard recently that you are building an aerospace aircraft?" Academician Yang Chaohai first saw Lin Xiao walking over and asked in surprise.
The other two academicians also looked at Lin Xiao with the same curiosity.
Lin Xiao said with a smile: "The Aerospace Research Institute is still under construction, so I have nothing to do. Come and have a look. Remember, didn't you say you wanted me to study the materials for this moon monument? Now I'm here to help.
help."
Hearing Lin Xiao's words, the three of them suddenly laughed.
"That's great!"
"Finally I've been waiting for you."
Lin Xiao quickly waved his hand and said: "Okay, okay, let's not say these words. First, show me the results you have measured now."
"Okay!" Sun Chengjun nodded, pulled out a lab report from the side, handed it to Lin Xiao, and said at the same time: "I guarantee it will surprise you."
Lin Xiao asked "confused": "Oh? How surprised can it be to me?"
The three academicians laughed and said nothing, and Lin Xiao also took over the experimental report. What was recorded on it was clearly about the various properties of the surface material of the moon monument.
Even though she had been prepared for it, Lin Xiao still showed a shocked expression, and she didn't even have to pretend.
Because in addition to hardness and heat resistance, there are various other properties, such as tensile strength, thermal expansion coefficient and other properties. Almost every property surprised him.
.
But at the end, when he saw a picture, he was suddenly shocked.
Because he suddenly remembered the fusion tungsten plate!