"The gravity around it is normal. It can be confirmed that it is definitely not a black hole, it must be the entrance and exit of space-time ocean currents."

Chen Bin began to study it carefully as if he had discovered something new. If it was a black hole, with the huge mass of the black hole, the surrounding gravity would be abnormal. It would be easy to discover through a gravitational lens. However, there is no abnormality now, which means it is not gravity.

"Start a small spacecraft into it."

The cabin door of the huge elliptical flying saucer-shaped spacecraft slowly opened, and a small unmanned spacecraft slowly flew out, following the plasma power, it dragged its long, dazzling tail flames towards the entrance and exit of the space-time current, and it was like a firefly in the dark void, very clear.

As soon as this unmanned spacecraft entered the area of ​​the entrance and exit of the space-time ocean current, it disappeared almost instantly, as if it was swallowed by the surrounding darkness.

"There is no contact, no radio contact."

"Well, it seems that it is entering the space-time current, and the speed of flying in the space-time current exceeds the speed of light, and it should be able to shield electromagnetic waves. Only after it leaves the space-time current and arrives at the Centaurus galaxy can we contact us again. However, the Centaurus galaxy is 4.3 light years away from us, and it will take several years to get the speed of electromagnetic waves."

Chen Bin nodded. Now he is sure that this is the entrance and exit of the space-time current. Through this space-time current, another galaxy can be reached in a very short time.

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

In the virtual chat world, Chen Bin happily shared the good news, but no one else could receive it for a while. The solar system seemed insignificant compared to the vast universe, but it was still very vast. Even if the speed of electromagnetic waves was connected to the earth from here, it would take several hours. If you go back and forth, you would have to multiply it by 2.

It can be said that the vast universe void is not only restricting humans from moving towards the universe void, but also the communication technology. Even if the speed of electromagnetic waves reaches the speed of light, it still seems too slow in the light universe void.

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

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

Li Fu began to contact people from other directions. The star system closest to the solar system basically sent a spacecraft to detect in each direction.

"We have also discovered the space-time currents in the direction of the Little Dog galaxy 11 light years away from the solar system."

At this time, Yu Liang's reply.

"The space-time currents in the direction of Aquila have also been discovered and are currently being accurately positioned."

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

"No space-time currents were found in the direction of the Southern Fish galaxy, and they are still under detection."

Luo Xiaoyao did not get any harvest. The Southern Fish galaxy is 22 light-years away from the solar system.

"The 22 light-year-old galaxy did not find space-time currents. If so, there would be no space-time currents connected to this distance of more than 20 light-years?"

While summarizing everyone's data, Li Fu carefully analyzed the data.

"Luo Xiaoyao, Zhan Fei, Dong Zhifei, you can search here for a few more days. If you don't find it, it means that there may be no time and space currents that exceed the distance and can return to the earth."

Just a few messages, it has been several days since the distance is too far away. It takes more than ten hours to travel back and forth between dozens of astronomical units, which is really difficult for people who are accustomed to real-time communication.

"It seems that it is necessary to get out quantum communication technology. In the solar system, communication has been delayed to this point. In the future, if we go to other galaxies to connect with the solar system, we still rely on the current communication technology. Let's not talk about whether we can contact each other. The time alone will be calculated in years."

"Even the nearest Centaurus galaxy is 4.3 light years away from the solar system, the electromagnetic waves are 8.6 years. In such a long time, daylily has bloomed and fallen many times."

Li Fu began to think in his mind that communication technology and transportation technology are the things that really restrict human footsteps. Just like in ancient times, it is impossible to rule the entire earth by riding horses and pigeons. The Mongol Empire, which had a vast territory back then, fell down. In fact, it was not because the territory was too vast, and the central government was powerless in the remote areas. Under the conditions to reach a certain level, such a vast territory would only be a flash in the pan.

Only in modern times, with the leap and development of transportation technology and Tongxu technology, not to mention the size of the Mongolian Empire, even the entire earth is included in the rule of a country, there is no problem at all, because powerful transportation technology and advanced communication technology are enough to allow the rulers to mobilize forces from all over the world to support any corner in a very short time.

However, in the interstellar era, the universe became even more vast, and even at the speed of light, it seemed very slow. Just inside the solar system, the communication of electromagnetic waves seemed to be unable to 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 proposed 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 the two particles with entangled states are, as long as one changes, the other will change instantly.

The process of using this characteristic to realize quantum communication is as follows: a pair of particles with entangled states are constructed in advance, and the two particles are placed on both sides of the communication, and the particles with unknown quantum states are combined to measure the particles with the sender's particles (an operation). Then the particles of the receiver collapse (change) instantly and collapse (change) into a certain state. This state is symmetrical to the state after the collapse (change) of the sender's particles. Then the joint measurement information is transmitted to the receiver through the classic channel, and the received information is unitary transformed (equivalent to reverse transformation) according to the received information, and the unknown quantum state is obtained exactly the same as the sender.

It's simple and easy to understand. This is what quantum is like a pair of twin brothers, and the twin brothers are copied from each other. If one raises his right hand, the other will also raise his right hand, the other will also laugh, that is, no matter whether any of them makes any moves, the other will also make the same moves.

And no matter how far apart these two brothers are, the actions between 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 the entangled state of quantum.

Because of the characteristics of quantum entangled states, the power of quantum communication technology emerged. Theoretically, quantum communication technology can ignore distances. No matter how far apart the distance is, quantum communication technology can achieve real-time communication without any delay.

No matter how far the distance is, this is definitely a technology that must be mastered by space navigation and interstellar colonization. No matter how far the distance is, you can keep in touch anytime and anywhere. There will be no communication delay because the distance is too far.

In addition to ignoring the specificity of distance and contact at any time, quantum communication technology has several other features that have also made scientists praise it, one of which is safety.

Compared with quantum communication technology, its security and efficiency cannot be compared with it. In terms of security, quantum communication will never "leak" it. It is reflected in the fact that the keys for quantum encryption are random. Even if intercepted by the stolen, the correct key cannot be obtained, so the information cannot be cracked.

Second, there are two particles with entangled states in the hands of both parties. If one of the particles changes in the quantum states, the quantum state of the other party will change immediately. According to quantum theory, any observation and interference from the macroscopic will immediately change the quantum state, causing it to collapse. Therefore, the information obtained by the thief due to interference has been destroyed and is not the original information.

In addition, quantum communication is very efficient. The unknown quantum states being transmitted will be in an entangled state before being measured, that is, representing multiple states at the same time. For example, one quantum state can represent two numbers 0 and 1 at the same time, and 7 such quantum states 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 in the traditional communication method. It can be imagined that if the transmission bandwidth is 64 bits or higher, the difference in efficiency will be amazing.

Of course, many may not be able to understand quantum entanglement. Quantum entanglement can be used to help understand it by "Schrödinger Cat": when putting a cat in a box containing toxic substances, then covering the box, after a while, I asked if the cat is dead or alive now?
Chapter completed!