I have a piece of land in my hand

Walking into a huge experiment at the base, Chen Fan raised his head and looked at a pot lid radar with a diameter of more than 50 meters in the central area. He turned to Einstein and asked curiously: "The epoch-making communication method you mentioned, should Wouldn't it just rely on radar waves to communicate?"

During World War II, radio communication tools were not popular, and the electromagnetic wave coverage on the earth was pitiful. The role of military radar was only to roughly detect the enemy's large bombers, not to mention the means of using radar for communication.

But here is the present world. It has crossed the 21st century. Radar communication between satellites and ground base stations has been applied to all aspects of social production. It can be said to be a household name.

Therefore, Chen Fan wondered whether Einstein had not yet fully accepted the world’s environment and mistakenly used radar as a tall communication tool.

"Yes, that's it!" Einstein was excited, gestured to a white coat researcher behind him, and ordered: "Open the skylight, aim the radar at the sun, turn on the power to 90%, and let our boss Witness the miracle with your own eyes!"

"Yes!" When the researcher saw Chen Fan look over, his face flushed, and he shouted excitedly.

No way, Chen Fan has already equated with God in the minds of these researchers.People who can break the rules of time and space and bring great scientists like Einstein to this world are close to gods even if they are not gods.

At this time, Schrödinger frowned and stepped forward and said: "Mr. Chen, I don't agree with Einstein's approach. If you want to see the relevant data, back it up on the computer."

"It is too dangerous to send such a huge amount of electromagnetic pulse signals to the sun!"

"Uh...wait a minute!" Chen Fan raised his hand to interrupt Einstein who was about to speak, then glanced at the lid radar in the distance, suddenly had a guess in his heart, so he tentatively asked: "You said that this epoch-making communication method was discovered in a Chinese novel. Is that novel called'Three Body'?"

Under Chen Fan's direct gaze, Einstein and Schrödinger nodded together.

"Mr. Chen, have you seen the'Three Body'?" Einstein took off his pipe and looked at Chen Fan in surprise. "The author of the novel explained in the book that super-powered electromagnetic waves are emitted to the sun, using solar energy. Mirror gain reflection effect, a means of amplifying electromagnetic signals."

"According to our latest research, this method is feasible, and in theory, the sun can be used as a signal source to broadcast signals into the deep space of the universe!"

"Take our base, a radar designed to detect the deep space of the universe as an example. It can pass through the sun and transmit a piece of electromagnetic information about 10KB to a planet 20,000 light years away!"

Einstein talked endlessly about the scientific basis, and Chen Fan was very curious.

Damn it!

There is actually this kind of operation?

You know, the radius of the entire Milky Way galaxy is only about 100,000 light-years away.The earth is about 26,000 light-years from the center of the silver plate and 24,000 light-years from the edge of the silver plate.

This means that the signal broadcasted by the solar energy mirror has a single straight line distance, covering almost all the planets on the spiral arm of Orion, from the galactic center to the edge of the Milky Way!

I am afraid that even the planets on the spiral arms of Perseus and Sagittarius, which are next to the spiral arms of Orion, can receive the signal!

"Fortunately, the speed of electromagnetic waves has a light-speed barrier...otherwise the joke will be a big deal." Chen Fan was startled with sweat and quickly ordered: "All signals about the position of the earth are not allowed to be sent out! "

Chen Fan doesn't know whether the law of the dark forest in the background of the universe exists, but what if it is true?

He didn't want to cause the earth to be invaded by other alien races because of the operations of Einstein and others, or be directly destroyed by the black hands behind the cosmic starry sky, using some attack methods that humans could not crack for the time being.

Chen Fan has no doubt that there are other advanced civilizations in the galaxy, after all, the Silver Blue Empire is a ready-made example.

"Don't worry, Mr. Chen, we still have this kind of pediatrics!"

Einstein was a little embarrassed, scratching his fluffy hair, and explained: "So far, we have only used this radar to transmit a signal once. The content is the phrase'hello', with the English alphabet attached, and no other information. "

"Moreover, the transmission speed of electromagnetic waves is limited by the speed of light. It takes 2 years to reach the edge of the solar system. As for galaxies outside the solar system, it takes longer."

After listening to Einstein's explanation, Chen Fan was a little relieved, and then went to the meeting room with them.

In addition to this epoch-making discovery of inter-galaxy communication, Schrödinger, Boll and Heisenberg also showed their joint research results-two quantum communication devices that are still in the experimental stage.

Chen Fan looked at the two square cases in the monitoring screen that could hold five or six people tall. He turned to look at Schrödinger and wondered: "You guys are fast enough? The technical difficulties of quantum communication have to be overcome? "

"No, Mr. Chen, this is not a machine we made..."

Schrödinger shook his head, not overjoyed, but replied realistically: "This is what we found in a hidden warehouse inside the base. It is a semi-finished product. We just made some changes on it."

"Moreover, many researchers in the base have also made a lot of contributions. Without their help, we could not have made such rapid progress!"

"The two quantum communication devices currently under test have a certain probability of losing their secret keys. They need to be improved and cannot be used normally. In theory, the communication distance between them should be about 50 light years. If it is far away, it will be difficult to detect particle oscillations."

Schrödinger admitted frankly that he was inspired by some public data on the China Mozi communication satellite on the Internet, and the hundreds of researchers contained in the base worked together to achieve what he has achieved today.

As a pioneer of quantum mechanics, Schrödinger possesses incomparable talents in this respect, which is why Chen Fan brought him to this world.

"Is 50 light years? It's enough." Chen Fan was quite satisfied with the communication distance between the two experimental equipment.

Quantum communication is actually to solve the problem that electromagnetic waves are constrained by the speed of light in the transmission process. It is a form of communication that manipulates quantum state particles and can effectively solve the problem of information security.

It is an important branch of quantum information science. It can use the principles of quantum mechanics to manipulate quantum states, exchange information between two locations, and complete tasks that cannot be accomplished by classical communication.

There are two kinds of quantum communication schemes studied by quantum communication theory.

One is the quantum key distribution scheme.

This scheme has two channels: a classic channel, which uses ordinary wired or wireless electromagnetic waves to send ciphertext.The other is a quantum channel, which is specifically used to generate keys.

Each time a message is sent, both parties in communication must regenerate a new key, that is, the encryption key is different each time, so that the message can be sent one time at a time, and it can also be detected during the key transmission process. Listener, so it can realize absolutely safe and reliable communication in principle, but it has the same delay problem as traditional electromagnetic communication.

But what Schrödinger and the others are studying is another scheme-the direct communication scheme, which uses quantum communication to directly transmit information.

The principle is to instantly transfer the unknown quantum state of a certain particle in A land to another particle in B land!So as to realize real-time communication between the two places!