From Almighty Scholar to Chief Scientist

Chapter 488 Quantum communication over 800 kilometers!I heard the sound of fireworks again
It goes without saying that quantum teleportation with five degrees of freedom is extremely difficult.

Because it is first necessary to observe the five basic elements of photons.

The degree of freedom refers to the basic properties of the particle, such as spin, which is the spin direction of the particle. We can represent "1" by clockwise rotation, and "0" by counterclockwise rotation. In addition, there are orbital angular momentum, Wavelength, etc., these things can represent a kind of information, and finally after translation and conversion, the information can be identified accordingly.

However, in order to achieve this kind of observation, there are also great requirements for the observation devices they need to manufacture.

All in all, once the five-degree-of-freedom quantum teleportation is realized, not to mention the instant communication between planets that they want to achieve now, they can even build a quantum network based on it.

Once the quantum network is built, it will not only benefit the data security of the world, but also avoid things like optical cables that need to rely on wires to transmit data. In this way, there is no need to worry about submarine optical cables in Europe. There is no possibility of being destroyed again.

Of course, this kind of thing needs to be discussed later. For now, what they need to do is to successfully realize the connection between the planets.

In this way, as time passed, Lin Xiao's research gradually entered the deep water area.

……

"How did you come up with the idea of ​​using this method to realize the observation of spin and orbital angular momentum?"

In the laboratory, Lin Xiao visited the spin-orbit angular momentum super-entanglement source and measurement device developed by Pang Wei.

The size of this device is not large, but the precision can be seen just from the appearance.

Pang Wei smiled, "You've already read the relevant information, so I won't say much about the technical aspects, but let me tell you what I thought at the beginning... Well, this is indeed a problem."

"If you want to observe two degrees of freedom at the same time, the first difficulty lies in the uncertainty principle. It is impossible for us to observe the position and momentum of a particle at the same time. After all, wave-particle duality, so before that, people generally It is believed that we can only observe one degree of freedom at most, and it is difficult to observe more degrees of freedom."

"Because this means that once we realize the observation of more degrees of freedom of a particle, it means that we are more certain about the existence of this particle, just like we peel off its uncertain coat layer by layer. , and in the end, it becomes certain.”

"So, in a way, the more degrees of freedom we determine, it's like challenging the 'truth' of uncertainty."

"Challenge the truth?" Lin Xiao couldn't help but smile, "Maybe."

Pang Wei nodded, and then said: "But at that time, I thought in my heart that although I said so, if I only find out one of its properties, wouldn't it be enough? Spin, and orbital angular momentum, are not It's all spinning, it's just that I need to determine which way it's spinning and how fast it's spinning."

Lin Xiao nodded slightly, but he was thinking in his heart, could it really only be observed in one direction?

This is not necessarily the case.

After all, he has not forgotten a paper he read at the beginning. The team led by the author of that paper realized the observation of waves and particles at the same time.

In this way, the so-called problem that only waves can be observed but not particles does not exist.

Thinking of this, his eyes light up. If such an observation device can be made according to the method they experimented with at the beginning, wouldn't it be possible to achieve more freedom of observation?

Particle nature and wave nature are two major categories, while spin, orbital angular momentum, wavelength, polarization, and momentum can respectively reflect these two categories.

Since particle and wave properties can be observed at the same time, it is natural to use other methods to observe these five degrees of freedom.

Lin Xiao immediately walked aside, came to the computer, and found the paper in which waves and particles were observed at the same time.

When Pang Wei saw his movements, he stepped forward and asked in doubt: "What's wrong? Do you have any ideas?"

However, Lin Xiao did not speak for the time being, but relied on his own impression to find the paper, and then showed it to Pang Wei.

"Look at the method used in this paper."

After taking a look, Pang Wei made an evaluation: "I have read this paper too. It is a very interesting and good experiment, but what are your plans?"

Lin Xiao said, "Change it."

"Magic reform? How magical reform?" Pang Wei was even more confused. What kind of transformation can this experiment carry out?
At this time, Lin Xiao opened another file, which was the modeling diagram of Pang Wei's spin-orbit angular momentum super-entanglement source and measurement device.

Afterwards, Lin Xiao began to modify the modeling diagram.

At this time, Pang Wei finally understood Lin Xiao's plan. He actually wanted to reproduce it on their devices based on the experimental observation method in this paper.

However, it is far from enough to observe both wave and particle properties at the same time. After all, these two properties are just two categories, and do not belong to the intrinsic properties such as degrees of freedom.

And what kind of magical transformation will Lin Xiao carry out so that they can observe its intrinsic nature?
Pang Wei was very curious as to what kind of results the chief scientist could produce in the end.

So, like this, half a month has passed.

Lin Xiao took out his first result and began to assemble it.

The assembly took a month, especially when Lin Xiao disassembled their spin-orbit angular momentum observation device, which directly made Pang Wei and his research team twitch violently. .

That is to say, the person in front of him is their chief scientist, otherwise, when they saw Lin Xiao dismantling things, they would definitely drive him out immediately.

This kind of expensive and precise thing, how can it be dismantled?

But there is no way, who told that it was Lin Xiao?

So they also hope that Lin Xiao can really come up with results.

However, the first result still made them feel a little disappointed.

Because the first new observation device assembled by Lin Xiao failed.

"The degree of freedom of the wavelength has not been observed, and even... the degree of freedom of the orbital angular momentum has been lost."

When a researcher reported this result, there was silence in the laboratory.

Although it's only been less than a month, it's normal even if they failed. The number of times they failed was not counted on a per-case basis, but on a cost-by-book basis, because their failed experiment reports can be directly written into several books. up.

But now it was Lin Xiao who failed.

Their invincible country's chief scientist, fell down... Ahem, failed?
Of course, Lin Xiao's gaze did not reveal disappointment, nor was he surprised by the result, but fell into deep thought again.

"Is it that the orbital angular momentum cannot be observed?"

"Is it because the wavelength is a wave property, while the orbital angular momentum is a certain particle property?"

"No, the problem is definitely not on this point. If you want to observe the wave and particle properties at the same time, even if there is a problem, there should be no spin left, or it should be either only observed Particles, or only waves were observed."

"So among these intrinsic properties, there should still be some unclear correlations, wavelength...orbital angular momentum?"

At this time, Pang Wei came up, patted him on the shoulder, and said, "It's okay, don't be discouraged, this is the first time."

Lin Xiao came back to his senses, and when he heard Pang Wei's words, he couldn't help but say, "Why do you think I'm discouraged?"

Hearing Lin Xiao's words, Pang Wei was taken aback for a moment, and then said with a smile: "It seems that I was worrying too much, it's fine if I'm not discouraged."

Lin Xiao shook his head, "There are not so many people to be discouraged, and it's not like I haven't encountered problems before."

"Well, then, have you gained anything now?"

"I can't talk about the harvest, I just have a little idea." Lin Xiao said: "I have to try again."

"Then try again, anyway, scientific research is a process of trial and error." Pang Wei nodded, and then said: "However, don't forget, the Chinese New Year is coming soon."

Lin Xiao was taken aback, the Chinese New Year is coming soon?
Looking back on the time, it seems that this is indeed the case, and 2027 is coming.

"Time flies by so fast." Lin Xiao sighed with emotion. After the new year, he would be 27 years old.

It's just that as his research on science deepens, there seems to be nothing to commemorate age or something, so it can only be regarded as his body composed of 10^28 particles. After the consciousness of "him" is established, the elapsed time is nothing more than, more strictly speaking, it should be represented by the atomic second of cesium-133.

Suddenly he was taken aback, atomic seconds?
time?

And quantum entanglement... intrinsic properties...

The atomic second is just... in a word, a very complicated way to determine the second, and it involves the period of the electromagnetic waves emitted or absorbed by the atomic transition.

Perhaps, starting from the calculation method of atomic seconds, he can find a way to observe the intrinsic properties of particles!
Thinking of this, he said, "Let's not say more, I remembered something more important."

Then he left here straight away and continued with the things he hadn't finished.

Seeing Lin Xiao's hurried figure, Pang Wei smiled, then turned his head to look at the other researchers present who were still in a daze, and said, "Okay, don't be dazed, and continue with your own business, say Maybe, before the new year, our chief scientist will be able to bring us good news."

……

In this way, the time quickly came to a few days before the Chinese New Year.

Just a few days before the Chinese New Year, Lin Xiao assembled the second observation device he had researched.

"nailed it?"

Walking into the laboratory, Pang Wei looked at the things on the test bench and asked curiously.

And Lin Xiao smiled slightly, "It's done."

"Three degrees of freedom?"

"Well, spin, orbital angular momentum, and wavelength."

Pang Wei nodded. Lin Xiao didn't have to adjust five degrees of freedom right from the start. After all, for this kind of technology, of course it's best to do it step by step.

Then he asked: "Then, try now?"

"No, I won't try it now." Lin Xiao said.

Pang Wei was taken aback for a moment, "Don't try it now? When will you try it? It will be New Year's Eve in three days, and a lot of people in the institute have gone back."

As he spoke, he couldn't help guessing: "You don't intend to keep the answer to the mystery until the next year, do you?"

But Lin Xiao just smiled lightly, and then said: "It's not the next year either."

Just when Pang Wei couldn't understand what Lin Xiao meant, Lin Xiao said: "Tonight, I will fly back to Qin Province, and then go to the quantum communication point in Xijing. You are here and I am there. Let's make direct contact!"

Hearing Lin Xiao's plan, Pang Wei was stunned, "Are you sure?"

The straight-line distance from Feishi to Xijing is more than 800 kilometers!

And now the farthest quantum communication distance in the world is only a hundred kilometers.

Is it necessary to go up to this level of strength?
Lin Xiao said with a smile: "Of course I'm sure. We must have the momentum to break the boat. If we don't succeed——I'll just go home for the New Year."

Pang Wei was taken aback by his last words, and then he said dumbfoundedly: "I just said, why do you still want to go to Xijing?"

Lin Xiao spread his hands and said, "If I fail here, I might feel something wrong in my heart all the time, and then I won't go back after the Chinese New Year."

"So it's better to play a big game directly. If you don't succeed, you can only choose to go home for the New Year."

Pang Wei smiled, and then asked: "But, are you sure? This time it's more than 800 kilometers, the probability of failure is still..."

Lin Xiao shook his head and said, "I believe in me, and I also believe in three degrees of freedom."

Seeing that Lin Xiao had already made a decision, Pang Wei finally stopped talking, nodded, and said, "Okay, then I'll wait until tomorrow."

"Ah."

Lin Xiao nodded, then got up, "Then I'll leave it to you, and I'm going to go back and pack my things."

"Okay." Pang Wei smiled and said, "See you next year."

"See you next year."

……

Lin Xiao took the plane back to Xijing that night.

After resting here for a night, he came to the quantum communication point in Xijing.

The quantum communication point in Xijing was built only in recent years. Because the distance of quantum communication was very limited before, cities were usually connected one by one, and quantum communication points were established in these cities to achieve transmission.

But now, if Lin Xiao's communication with a distance of more than 800 kilometers is successful, obviously, it will be far less troublesome.

Therefore, now Lin Xiao is looking forward to their success.

When the Xijing Quantum Communication Point learned that Lin Xiao was coming here to conduct quantum communication experiments, it naturally welcomed it sincerely and provided Lin Xiao with the best help.

In this way, they soon prepared the relevant equipment.

This device was naturally brought by Lin Xiao from Feishi. After all, if you want to connect the two devices, the first thing you need to do is to entangle the photons in the two devices, and the entangled particles usually come from one events, only in this way can they be connected.

As for how to entangle two particles separated by a certain distance, as of now, they have no way.

Therefore, the equipment brought by Lin Xiao can entangle with the photons in the spin-orbital angular momentum-wavelength observation device he left on Pang Wei's side. Next, he only needs to control the shape of the photons on his side. The photon in the observation device can be changed through the entanglement effect, and the observation device can observe the spin, orbital angular momentum and wavelength of the photon inside, so as to determine the information.

"Chief Lin, everything is ready. When do you think the experiment will start?"

A staff member said to Lin Xiao after completing all the debugging work according to Lin Xiao's preparation.

"it is good."

Lin Xiao nodded, then took out his mobile phone and called Pang Wei.

The phone was also quickly connected.

"Old Pang, are you alright?"

"All of us are waiting for news from your side."

Lin Xiao smiled, "Okay, I'll send you a message right now!"

Then he walked to the computer beside him, thought about it on the control software, and entered a few words: May the world be peaceful.

Then, he pressed Enter.

Afterwards, these messages were converted into electrical signals by the computer and input to the sending device beside him.

After the chip in the device received the electrical signal, it then began to control other components inside, causing the controlled photons inside to react, and then reacted according to the corresponding information.

Then, an invisible turbulence broke through in an instant, as if breaking through a dimension, and arrived thousands of miles away in an instant. In Feishi Quantum Physics and Quantum Information Research Department, the brand new three-degree-of-freedom entanglement source observation device.

……

"Each of us wants world peace."

Pang Wei's voice sounded from the phone.

A smile appeared on Lin Xiao's face.

Of course, as well as the other people around him, cheers erupted.

Because they all saw it, the message Lin Xiao sent in the past was to hope for world peace.

But now, on the phone, Pang Wei's answer undoubtedly means that he also knows what the message Lin Xiao sent in the past.

This short message, which spanned [-] kilometers, surprised everyone just like the first sentence Alexander Bell said in the world's first telephone call after he invented the telephone.

……

The news didn't stay hidden for long before it spread all over the world.

Of course, it was only more than 800 kilometers away, which did not surprise everyone. This news has attracted the attention of so many people, largely because it was developed by Lin Xiao, and it has something to do with quantum communication.

However, it is clear that insiders look at the door. For people in the quantum communication field, this news is undoubtedly full of gold.

Breaking through one degree of freedom again, and also realizing information transmission over a distance of more than 800 kilometers, the breakthrough represented by this is well known to these insiders.

So all of a sudden, scientists from all over the world who study quantum communication were amazed by it.

"I buy Karma, more than 800 kilometers, are they going to prepare for the moon landing?"

"This Lin, why can he always do such incredible things? jesus-christ!"

"It's unbelievable that it's three degrees of freedom! How did he do it?"

"Physics, is there anything else that can stop him?"

……

However, when the quantum communication community was shocked and marveled at Lin Xiao's inhumanity, Lin Xiao had already begun to live his life.

Of course, his family has also seen reports about this technology on the Internet, so they are all curious about it.

Ever since, during the New Year's Eve dinner, I asked.

"Xiaoxiao, everyone on the Internet is saying that the new technology you made recently is very powerful?"

"It's not a question of whether it's powerful or not, it's the rare kind..." Lin Xiao thought for a long time and found that he didn't know how to explain it to his parents so that they could understand, and finally said simply: "Anyway, it's quantum mechanics, the very powerful one."

"Technology and hard work?" Father Lin asked.

Hearing these words from his father, Lin Xiao was taken aback for a moment, and finally couldn't help covering his face, and said, "Dad! Stop shaking your hands!"

Hearing this kind of words from the elders always gave him a sense of the collapse of the world.

But at this moment, the sound of fireworks exploding suddenly sounded outside the window.

Yang Rong next to him glanced at the fireworks blooming outside the window, and couldn't help saying, "Hey, there are still people who dare to set off fireworks."

And Father Lin said with a smile: "It seems that the higher authorities have approved the setting off of fireworks and firecrackers again. I don't know what's going on, but it's a good thing."

"It feels a bit like the Chinese New Year." Yang Rong also laughed.

At this time, Lin's father patted Lin Xiao's shoulder, said with a smile: "How is it? After eating, let's go and let it go. It's been a long time since we played."

Only at this time did he notice that Lin Xiao seemed to be in a daze looking at the fireworks outside the window.

"Xiaoxiao?"

Lin Xiao came back to his senses, then smiled and said, "Okay."

……

Firecrackers can be set off during the Chinese New Year. This matter quickly became a hot topic and aroused many people's discussions. Although people don't know why the ban on fireworks and firecrackers was lifted again, it is known that the vast majority of people I feel very happy.

The young people called their partners to set off the long-lost firecrackers, and even the adults would go to play and miss the past childhood.

As for Lin Xiao, he knew that the reason for firing the cannon was all because of his proposal after the successful realization of controllable nuclear fusion.

But as he who brought all this, he didn't have much time to enjoy this kind of entertainment.

After experiencing it with his father on the night of New Year's Eve, he entered his own research again the next day.

After all, just three degrees of freedom is not enough, his goal is five degrees of freedom.

Ever since, he was studying again and spent this Spring Festival holiday.

And one month after returning to Feishi, he once again designed a four-degree-of-freedom entanglement source observation device.

……

(End of this chapter)