When it comes to quantum communication, many people may say that this quantum communication technology has been studied by scientists on the earth for a long time, and this technology can be traced back to Einstein, one of the greatest scientists in human history, who once proposed a "ghost" - the empirical evidence of quantum entanglement.

In 1982, a research team led by physicist Alan ~ Especkert confirmed the existence of the phenomenon of "quantum entanglement" of microscopic particles for the first time.

In 1993, the scientist Bennett proposed the concept of quantum communication, which is a communication method that carries information by quantum states, and uses the quantum entanglement principle of elementary particles such as photons to achieve a secure communication process. The concept of quantum communication has made Einstein's "ghost" - the benefit of quantum entanglement begin to really exert its true power.

In 1997, Pan Jianwei, a young Chinese scholar studying in Austria, cooperated with Dutch scholar Bomister and others to realize the long-distance transmission of unknown quantum states for the first time. This is the first time in the world that a quantum state has been successfully transmitted from a photon in place A to a photon in place B. In the experiment, only the "state" that expresses the quantum information is transmitted, and the photon itself, which is the carrier of information, is not transmitted.

In September 2009, Pan Jianwei's scientific research team built the world's first all-access quantum communication network on the basis of the 3-node chain-like optical quantum telephone network, and realized real-time voice quantum secure communication for the first time, but the technology can only be within a range of 20 kilometers, and the range is too small.

Although scientists have made continuous efforts to slowly develop the teleportation range from tens of kilometers to hundreds of kilometers, it can barely be said if it is used on a planet, but it is far from enough to be used for ultra-long-distance communication between stars.

In addition, the current quantum communication technology consumes very high energy, and a quantum communication laboratory even needs to build a special power station to supply power, and there are serious problems such as the entangled state is too sensitive to channel length jitter, and the bit error rate increases too fast with the channel length, which cannot be used in actual long-range quantum communication, let alone ultra-long-range communication in the vast universe.

"The development of quantum communication technology on the earth is very fast, but this quantum communication technology still has a way to go from theory to practical application."

Li Fu thought carefully in his mind, about the research related to quantum communication technology, Fuyun Group Science Research Institute also has it, and Fuyun Group's quantum communication technology will not be worse than any country on the earth, but this quantum communication technology now seems to have entered a critical bottleneck period.

Scientists are desperately trying to improve the distance of quantum communication, but slowly found that communication can only be achieved within a range of 1000 kilometers at most, but the energy consumption is too large, too sensitive, the error rate is relatively high, and it is necessary to establish a special communication channel, etc., these factors have been restricting the development of this technology.

Even in the current situation, although this quantum communication technology seems to have many advantages, it is far from being able to compare with traditional electromagnetic wave technology in practical terms.

"With a kick in the door, we may be able to break through this bottleneck soon, or we may not be able to break through this bottleneck for a long, long time."

Li Fu naturally learned the technology of quantum communication very early in the seeds of civilization, knew the situation of this technology, and then looked at the existing technology on the earth, and saw the current situation at a glance.

……

The source town of Fuyun Group Research Institute, this covers an extremely vast area of scientific research institutes, the environment is quiet, the air is fresh, the climate is pleasant, a research institute, laboratories, villas, etc., by the mountains and rivers, looming in the dense forest.

Quantum Communication Research Laboratory, which is a laboratory established by Fuyun Group itself specializing in quantum communication technology, the person in charge of the laboratory is called Duan Guang, although this Duan Guang is young and young, and he is only in his early 30s, but he is definitely the world's top scientist in the field of quantum communication.

Of course, the outside world does not know Duan Guang, like many outstanding scientists in the Fuyun Group Research Institute, the company has not disclosed many technologies to the public for the sake of secrecy, and many outstanding scientists are unknown to the outside world, but everyone knows the level of these scientists internally.

Scientists who have Yuan Li cultivation in their bodies, their bodies and brains have been nourished by Yuan Li, and they are far from being able to compare with ordinary scientists in scientific research, and their learning ability is very strong, the key is that they have strong understanding, active brains, good physical fitness, and the speed of learning and research is beyond imagination.

Fuyun Group can have today, not because of anything else, that is, by holding hundreds of thousands of excellent scientists in their hands, any one of them is a top scientist in the outside world, many technologies that have not been announced, any one is enough to shock the world, anti-gravity technology, genetic recombination technology, energy weapon technology, etc.

"Brother Fu, what kind of wind blew you to me?"

Duan Guang, who was dressed in a white coat, saw Li Fu walk into his laboratory, and hurriedly came over to greet him, the scientists in the entire research institute basically knew Li Fu, and the heads of each laboratory had a very good relationship with Li Fu, because Li Fu would go to various laboratories to chat with everyone and discuss the progress of the research and so on.

Of course, these science and technology bigwigs can make Li Fu congratulate, Li Fu is not the identity of the boss, the scientists are a group of proud people, many people don't care about power and money, what can really make them respectful is to be better than them in the field they are best at.

Li Fu was able to fight with scientists in various laboratories and scientific research fields, precisely because Li Fu was able to say one, two, or three in various fields of science and technology, and even many problems encountered by everyone, Li Fu was able to point them out at a glance, so everyone admired Li Fu from the bottom of their hearts.

It is normal for a person to be good at a certain field, but to be able to be good at multiple fields, or even all fields, is very bullish, and people have to admire such people.

"I heard you've been irritable lately, so come and have a look."

Li Fu and Duan Guang are also very familiar, so they are also very casual, without the slightest shelf, and the other scientists around them have also looked at them one by one at this time, many of them are new to the research institute, and they don't know Li Fu yet, and they are also very excited to see Li Fu one by one at this time.

"The boss doesn't even have a little."

"Of course, Brother Fu is very easy-going, if you have any questions, you can go up to Brother Fu for advice."

"As far as I know, he graduated from biomedical science, does he also know quantum communication?"

"Hehe, it's not just the field of quantum communication, it seems that there is no Brother Fu who doesn't know."

“……”

The people on the side muttered, and Li Fu's cultivation was naturally clear, but they didn't care in the slightest, and this kind of thing was not once or twice.

"In the past few months, there has been no progress in research, and I am annoyed."

Hearing Li Fu's words, Duan Guang also rubbed his head, and said helplessly, what scientific research is most afraid of is entering a bottleneck period, because once it enters a bottleneck period, there may be no progress for several years, more than ten years, or decades, and some scientists have studied in a certain field for a lifetime without any results.

This does not mean that the scientist is not outstanding or good enough, it can only be said that after falling into a bottleneck, it takes a flash of inspiration or a sudden epiphany to go further, otherwise the already boring research will become even more irritating.

Looking at the hope, not seeing the future is the most uncomfortable, this period of light is almost like this, quantum communication research has entered a bottleneck period, even if more resources and energy are invested, there is still no progress, from beginning to end carefully over and over again, but still do not see a trace of progress.

"Tell me?"

Li Fu nodded to show his understanding, this is like doing a math problem, when encountering a difficult math problem, he has solved it over and over again, but no matter how he solves it, he still can't solve it, at this time people will become very irritable, tearing off the scratch paper, crumpling it into a ball, etc.

"At present, we have been able to achieve transmission within tens of thousands of kilometers, but the energy consumption is still very large, errors are frequent, and special channels need to be established, which is nothing, but in recent months, we have not made any progress in all aspects such as communication distance, and we can not improve the distance, nor can we say that we can reduce energy consumption and so on."

Duan Guang scratched his hair a few times with some annoyance, although he encountered all kinds of difficulties in the past, there was always progress, which could make people see hope, but now there has been no progress for several months, and people have become very irritable.

"A range of tens of thousands of kilometers?"

Li Fu nodded silently in his heart, such a large range is completely okay for communication on the earth, as long as the error rate and energy consumption can be reduced, it can also be received, but this is not the quantum communication technology he wants, the quantum communication technology he wants can be used in the universe.

Even if there are countless galaxies, river systems, etc., relying on quantum communication technology can achieve ultra-long-distance real-time communication, this is quantum communication technology, and the current quantum communication technology is not even comparable to the traditional electromagnetic wave communication technology, tens of thousands of kilometers seems to be a large range, but not to mention being used in the vast universe, it is far from enough in the solar system.