Universe dominance

"The surrounding gravity is normal. It's definitely not a black hole. It's definitely the entrance and exit of the space-time ocean current."

As if he had discovered something new, Chen Bin began to study it carefully. If it were a black hole, with the huge mass of the black hole, the surrounding gravity would be abnormal. It could be easily discovered through a gravitational mirror lens, but there is no abnormality now. , indicating that it is not gravity.

"Send small spacecraft into it."

The hatch of the huge oval flying saucer-shaped spacecraft slowly opened, and a small unmanned spacecraft slowly flew out. It was powered by plasma, and it dragged a long, white and dazzling tail flame towards the spacecraft. The entrance and exit of the space-time ocean current flies away, like a firefly in the dark void, very clear.

As soon as this unmanned spacecraft entered the range of the entrance to the space-time ocean outflow, it disappeared almost instantly, as if it was completely swallowed up by the surrounding darkness.

"Lost contact, no radio contact."

"Well, it seems that it has entered the space-time ocean current. The speed of flying in the space-time ocean current exceeds the speed of light, and it should be able to shield electromagnetic waves. Only after it exits the space-time ocean current and reaches the Centauri galaxy can it contact us again. It’s just that the Centauri Galaxy is 4.3 light-years away from us, and it will take several years at the speed of electromagnetic waves.”

Chen Bin nodded. He was now very sure that this was the entrance and exit of the space-time ocean current. Through this space-time ocean current, one could reach another galaxy in a short time.

"Haha, brothers, I have discovered the current of time and space here."

In the virtual chat world, Chen Bin happily shared the good news, but for a while, others could not receive it at all. The solar system was insignificant compared to the vast universe, but it was still very vast, even at the speed of electromagnetic waves. It also takes several hours to contact the earth from here, and the time for this round trip will be multiplied by 2.

It can be said that the vast void of the universe is not only restricted by transportation technology, but also by communication technology. Even if the speed of electromagnetic waves reaches the speed of light, it still seems too slow in the radiant void of the universe.

A few hours later, on Earth dozens of astronomical units away, Li Fu finally received news from Chen Bin.

"Yu Liang, Tang Boyuan, Dong Zhifei, Luo Xiaoyao, Zhan Fei, and Chen Bin have discovered the currents of time and space. Have you gained anything?"

Li Fu began to contact people from several other directions. Basically, a spacecraft was sent from every direction to detect the star system closest to the solar system.

"We have also discovered the space-time ocean currents in the direction of the Canis Minor galaxy, which is 11 light-years away from the solar system."

At this time Yu Liang replied.

"The space-time ocean currents in the direction of Aquila have also been discovered, and precise positioning is currently underway."

Tang Boyuan also gained something here. The Aquila galaxy is 16 light-years away from the solar system.

"No space-time ocean currents have been found in the direction of the Pisces Australis galaxy, and they are still being detected."

Luo Xiaoyao had nothing to gain here. The Pisces Australis galaxy is 22 light years away from the solar system.

"No space-time ocean currents have been found in the Pisces Australis galaxy, which is 22 light-years away. If so, if the distance is more than 20 light-years, there would be no space-time ocean currents connecting it?"

Li Fu compiled everyone's data and analyzed the data carefully.

"Luo Xiaoyao, Zhan Fei, and Dong Zhifei, please search for a few more days. If nothing is found, it means that there may be no space-time currents beyond the distance to return to Earth."

It's just a few pieces of information. Several days have passed since this time. Because the distance is too far, dozens of astronomical units apart, it takes more than ten hours for the electromagnetic signal to go back and forth. It is really hard to accept for people who are now accustomed to real-time communication.

"It seems that it is necessary to develop quantum communication technology. Within the solar system, communication has been delayed to this point. If we go to other galaxies in the future, we will still rely on current communication technology to communicate with the solar system. Let's not talk about it for now. Whether we can contact him or not, the time alone will be measured in years.”

"Even in the nearest Centauri galaxy, which is 4.3 light-years away from the solar system, it takes 8.6 years for the electromagnetic waves to come and go. In such a long time, daylilies have bloomed and fallen many times."

Li Fu began to think in his mind. Communication technology and transportation technology were the two things that really restricted the pace of human beings. Just like in ancient times, it was impossible to rule the entire earth by relying on horseback riding and carrier pigeon communication. Mongolia had a vast territory back then. The empire collapsed suddenly, in fact, it may not be because the territory is too vast, and the central government is simply powerless to deal with remote areas. Under certain conditions, such a vast territory will only be short-lived.

Only in modern times, with the rapid development of transportation technology and transportation technology, let alone a territory as large as the Mongolian Empire, there is no problem at all even if the entire earth is brought under the rule of one country, because of powerful transportation technology, advanced Advanced communication technology is enough to allow rulers to mobilize support from all over the world to any corner in a very short time.

However, in the interstellar era, the universe has become even more vast and vast, and even the speed of light is very slow. Just within the solar system, electromagnetic wave communication cannot keep up with the requirements of the times.

The quantum communication technology mentioned by Li Fu is the next generation of advanced communication technology proposed by scientists. The principle of quantum communication technology is a technology based on the principle of quantum entanglement effect.

Quantum communication is mainly based on the theory of quantum entangled states and uses quantum teleportation (transmission) to achieve information transmission. According to experimental verification, no matter how far apart two particles are in an entangled state, as long as one changes, the other will also change instantly.

The process of using this characteristic to achieve quantum communication is as follows: construct a pair of entangled particles in advance, place the two particles on both sides of the communication, and jointly measure the particles with the unknown quantum state and the sender's particles (one operation) , then the particles of the receiver collapse (change) instantly and collapse (change) into a certain state. This state is symmetrical to the state of the particles of the sender after collapse (change), and then the jointly measured information is transmitted through the classical channel To the receiver, the receiver performs a unitary transformation (equivalent to a reverse transformation) on the collapsed particles based on the received information, and then the unknown quantum state is exactly the same as that of the sender.

To put it simply and easily understandable, it is like this. Quantum is like a pair of twin brothers, and the twin brothers are copies of each other. If one raises his right hand, the other will also raise his right hand. When one laughs, the other will also laugh, that is, no matter what action one of them makes, the other one will also make the same action.

And no matter how far apart the two brothers are, the actions of the two brothers will always be the same in any state, and there is no time difference between them, and there will be no difference due to distance. This is quantum entanglement. state.

Because of this characteristic of quantum entanglement, the power of quantum communication technology comes into being. Theoretically, quantum communication technology can ignore distance. No matter how far away it is, quantum communication technology can achieve real-time communication without any problems. any delays.

Communication technology regardless of distance is definitely a technology that must be mastered for space navigation and interstellar colonization. No matter how far the distance is, you can stay in touch anytime and anywhere. There will be no communication delays due to the distance.

In addition to the ability to communicate at any time regardless of distance, quantum communication technology has several other features that scientists are full of praise for, one of which is security.

Compared with traditional communication technology and quantum communication, its security and efficiency cannot be compared. In terms of security, quantum communication will never "leak secrets". One of the reasons is that the key of quantum encryption is random. Even if it is intercepted by a thief, the correct key cannot be obtained, so the information cannot be cracked.

Second, there are two entangled particles in the hands of both communicating parties. If the quantum state of one particle changes, the quantum state of the other party will change immediately. And according to quantum theory, any macroscopic observation and interference will occur. Immediately changes the quantum state, causing its collapse, so the information obtained by the thief due to interference has been destroyed and is not the original information.

There is also the fact that quantum communication is very efficient. The unknown quantum state being transmitted will be in an entangled state before being measured, that is, it represents multiple states at the same time. For example, a quantum state can represent the two numbers 0 and 1 at the same time. 7 such quantum states. The state can represent 128 states or 128 numbers at the same time, that is, 0~127. Such a transmission of optical quantum communication is equivalent to 128 times of traditional communication. You can imagine how amazing the efficiency difference will be if the transmission bandwidth is 64 bits or higher.

Of course, many people may not be able to understand quantum entanglement. Quantum entanglement can be understood using "Schrödinger's cat": when you put a cat in a box with poison, then close the box, and after a while ask the cat what it is now Dead or alive?

The answer from quantum physics is: it is both dead and alive. Some people will say that you will know if you open the box and take a look. Yes, you will definitely know if the cat is dead or alive when you open the box, but according to the explanation of quantum physics: this state of death or alive is the result of human observation, that is Macroscopic interference by humans causes the cat to become dead or alive, which is not its true state when the box is covered. Similarly, microscopic particles will always be in two states of "dead" and "alive" before being "disturbed". The superposition of , can also be said to be both "0" and "1", so the security guarantee of quantum communication technology is very reliable.

Because of the characteristics of quantum entanglement, even if you intercept information, due to the characteristics of entanglement, when artificially deciphering the information macroscopically, it will immediately change the quantum state and cause its collapse. Therefore, the information obtained by the thief due to interference has been The destruction is not the original information.

Quantum communication technology has three major characteristics: real-time, security, and efficiency, none of which are available in traditional communication technology.

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