This article is from WeChat official account:Fyvoice (ID: fyvoice), author: Yuanlan Feng, from the head of FIG: unsplash
On July 23, 2020, the U.S. government announced the Building a blueprint for the quantum internet proposes to bring the United States to the forefront of the global quantum competition and lead a new era of communications.
The U.S. government announces the blueprint for building a quantum internet
Bring the United States to the forefront of the global quantum competition, leading a new era of communications
This report claims that the communication system based on quantum mechanics is “one of the most important technological frontiers of the 21st century”, and scientists plan to build a “almost unbreakable network” by this. Quantum Internet, which can control and transmit information more securely, is currently in the initial stage of development, and will have a profound impact on key areas related to science, industry, and national security in the future. Quantum Internet may first be promoted in industries such as banking and medical services, applied to the fields of national security and aviation communications, and ultimately have a broad impact on the lives of everyone in the world.
The communication system based on quantum mechanics is one of the most important technological frontiers in the 21st century
Almost Unbreakable Network
Most people may not understand the scientific terms, but from another perspective, you can understand what this is: The United States wants to catch up with China in the field of quantum communications.
What is the quantum internet?
In recent years, China has achieved many world-leading results in the field of quantum communications. For example, on August 16, 2016, the world’s first quantum science experimental satellite “Mozi” was launched, and on September 29, 2017, the world’s first quantum communication trunk line “Beijing-Shanghai trunk line” was opened. In addition, it is also in the forefront of the world in frontier basic research fields such as “quantum teleportation”, “quantum relay”, and “experimental judgment quantum gravity theory”.
Mozius quantum science experiment satellite stamp
my country’s first realization of the invisible transmission of multiple free metric sub-states
It can be said that China is leading the development of the world in the field of quantum communication. This is one of the few scientific fields where China is leading rather than running side by side. In central documents such as the “13th Five-Year Plan” and the President’s New Year’s message, many timesRegard quantum communication as a landmark scientific achievement in China.
Quantum Internet is the latest term for quantum communication networks. Although the exposure of quantum communication in the media is not low, because the threshold of this discipline itself is very high, it needs to be based on quantum mechanics and cryptography, so most people may still not understand what the quantum Internet is. To make matters worse, there are many false statements circulating on the Internet, and many people are even more confused after reading it.
So, let’s first briefly point out what the quantum internet is and what it is not, and then explain its principles in a little detail.
What is the quantum internet?
The short answer is: It can ensure the “unconditional security” of communication through the method of “quantum key distribution”( That is, it will not be cracked by any mathematical method).
What is the quantum internet?
What is the quantum internet?
First of all, it is not a scam.
This is a very dumbfounding point, we actually need to start with “it is not a scam”.
Since China has taken the lead in quantum communication, there have been many voices of opposition and doubt. Many people say that this thing is pseudo-science and deceives the leadership, and Pan Jianwei and others are liars, which is plausible. Some of the authors are staff members of prestigious universities at home and abroad, who can speak a lot of scientific terminology and confuse the general public.
Actually, I have written a lot of articles(You will be able to understand the quantum information completely. Countless articles on Minke—The gains from reading Minke articles are negative.
So what is the quantum internet?
If you really want to understand what the quantum internet is, then the short answer is the one mentioned earlier: through the method of “quantum key distribution”, the “unconditional security” of communication is guaranteed.(that is, it will not be cracked by any mathematical method). On this basis, there are many more advanced technologies. But those are still in the laboratory research stage, far from practical. Only quantum key distribution is a practical technology. Below, we will briefly explain quantum key distribution.
Traditional encryption methods are mostly based on the one-way difficulty of certain mathematical problems. In other words, a problem is easy in the positive direction, you can use it to encrypt, but the reverse direction is very difficult, making it very difficult to crack.
For example, one of the most commonly used cryptosystems is called RSA, and the mathematical problem it uses is called factorization. In other words, it is easy to find two large prime numbers and multiply them to get a composite number. But it is very difficult to give you a large composite number and decompose it into two prime factors.