Chapter 123, Quantum Computers
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Planting maple trees after arriving at a place is a tradition of Liuyun Town in the Qingquan era. A few brothers at home planted a few maple trees, and the two of He Jingfeng and his brothers naturally planted two maple trees.
But if you think these maples are traditional maples, you are wrong. This maple tree is a new type of maple tree specially developed by a company in the empire and created by genetic recombination technology.
Its characteristic is that it has strong adaptability. As long as it is on a life planet, it can have an almost 100% survival rate; it can grow very tall, lush branches and leaves, and has very good ornamentality. This kind of maple tree used for symbolicity naturally cannot be thin and has few small leaves.
In addition, this kind of maple tree grows very fast. Although it cannot be faster than those super fast-growing trees, it is more than ten times faster than traditional maple trees. It only takes a few years to grow into towering trees. In addition, this kind of maple tree is genetically regulating. All the trees used to be taken to alien planets for planting have been funded for birth control surgery and cannot reproduce the next generation in order to protect the ecological environment of the planet!
In the interstellar era, anything is not a simple thing. This maple tree that combines biotechnology technology is called the "inheritance tree" within the empire!
After planting the inheritance tree, He Jingfeng was worried. The population of Canis Galaxy is only tens of millions, and when it is divided into each planet, the population is very sparse. His family's 20,000 mu of land could not be thought of how to develop it.
The land is vast and sparsely populated, almost every household has huge land, and everyone is worried. He Jingfeng is the same, flying slowly on his territory in an aircraft, wanting to find something special.
"The land is good, a good land that is flat and fertile, but unfortunately I can't find any highlights to develop! Now it seems that I can only plant some cash crops." He Jingfeng shook his head and was worried.
...
The Milky Way, the solar system, and the imperial capital Venus, Liu Qingquan woke up from sleep early. The biological clock he had developed for a long time was very punctual and woke up on time.
Look at the beauty in her arms. Because the throne was passed to her son, she has been obedient to herself over the past period of time, unlocking countless postures that she had never dared to think about before, which made Liu Qingquan say she couldn't stand it.
"Well, I have a lot of leisure after this location was posted, and I am a little uncomfortable!" Liu Qingquan put his head on his hands and looked at the beautiful scenery outside, with bright sunshine and birds singing and flowers scenting, which is a good day!
"Zhou Jingbo seems to say that there is new progress in quantum computers. Well, let's go where to see him today!" Liu Qingquan seemed to have thought of something and was about to get up quietly, tiptoing for fear of disturbing the beauty beside him.
"Why are you going early? Don't you want to move anymore?" But the beauty around you had already woken up. Seeing Liu Qingquan treading, she grabbed her and said charmingly.
"You die~ demon~ spirit, let you know how powerful I am today!" Liu Qingquan looked at the beauty's gracefulness half-covered and half-exposed beauty, ready to be furious and let the other party feel the thunder rain!
On a bright morning, waves of charming sounds of nature sounded, evoking infinite reverie!
At 9 o'clock in the morning, Liu Qingquan came to the Quantum Research Institute of the Imperial Academy of Sciences with a refreshing spirit. As the most important branch of the Imperial Academy of Sciences, the Quantum Research Institute covers a very large area and has many research departments. There are more than a thousand laboratories of research institutes of all sizes and hundreds of thousands of scientific research staff of all sizes.
"Boss, you're here just right. I have a difficult problem here and I'm just going to ask you for advice."
Zhou Jingbo, who was concentrating on experimenting, accidentally saw Liu Qingquan coming over and hurried over. Although the research on quantum computing has reached its final point, there are still some major issues that have not been overcome. Over the past period of time, Zhou Jingbo was almost worried. When he saw Liu Qingquan coming over, he came over as if he saw a savior!
"Look at you, you are old at least. Why do you say that you are also a national treasure figure in the empire now? Pay attention to your image!" Liu Qingquan shook his head and said when he saw Zhou Jingbo's hurrying look.
"Boss, you don't know my temperament. Besides, I'm stronger than a 20-year-old boy now, and it's not a problem to kill a tiger!"
Zhou Jingbo curled his lips and practiced the Yuanli method specially designed by scientists. Moreover, Zhou Jingbo has been practicing since he graduated from college and entered Qingquan Technology. He is quite old, so his progress has been good. Now he looks no different from decades ago.
"Boss, our quantum computer research work has reached the last step, but to this day, there is still a very headache problem!"
Zhou Jingbo is a workaholic. He will be directly on the topic without saying a few words to Liu Qingquan.
"Well, what's the question?" Liu Qingquan nodded. Compared to those who like compliments, Liu Qingquan still prefers Zhou Jingbo's decisive style. This is what a scientist should have!
"Whether it is quantum parallel computing or quantum simulation computing, it essentially takes advantage of quantum coherence. Unfortunately, it is difficult for us to maintain quantum coherence in actual systems."
"In quantum computers, quantum bits are not an isolated system. They will interact with the external environment, resulting in the attenuation of quantum coherence, namely decoherence (also known as "decoherence"). Therefore, to make quantum computing a reality, a core problem is to overcome decoherence."
Zhou Jingbo began to slowly explain the difficulties encountered in his work. If you need others to answer your questions for you, you need to slowly explain the causes and consequences of the matter. This is how Zhou Jingbo is.
"In order to eliminate quantum decoherence, we have adopted countless methods, and finally we found that quantum coding is the most effective way to overcome decoherence discovered so far."
"The main quantum encoding schemes are: quantum error correction code, quantum error avoidance code and quantum error prevention code. Quantum error correction code is an analogy of classic error correction codes and is the most studied type of encoding. Its advantages are wide application range, but its disadvantage is its low efficiency."
When Zhou Jingbo descended here, he stopped a little and asked Liu Qingquan to absorb the things in front first.
After listening to Zhou Jingbo's words, Liu Qingquan kept calculating the other party's ideas in his mind. Liu Qingquan, who was knowledgeable, naturally knew what problems they had encountered at once.
Quantum computers, as the name suggests, are machines that implement quantum computing. To explain quantum computing clearly, first look at classical computing. Classical computers can be physically described as machines that transform input signal sequences according to certain algorithms, and their algorithms are implemented by the computer's internal logic circuits.
Classical computers have the following characteristics: their input states and output states are classic signals, which are described in the language of quantum mechanics, that is, their input states and output states are both eigenstates of a certain mechanical quantity. For example, if the input binary sequence 0110110 is input with quantum notation, that is, |0110110>. All input states are orthogonal to each other. It is impossible to input the following superposition states for classic computers: C1|0110110>+C2|1001001>.
Each step of transformation within a classical computer evolves into an orthogonal state, while general quantum transformations do not have this property. Therefore, the transformation (or calculation) in a classical computer only corresponds to a special set.
Corresponding to the above two limitations of classical computers, quantum computers have been promoted separately. The input of quantum computers is described by a quantum system with a finite energy level, such as a two-level system (called qubits, and the transformation of a quantum computer (i.e., quantum computing) includes all possible positive transformations.
Therefore, the characteristics of quantum computers are: the input state and output state of quantum computers are general superposition states, which are usually not orthogonal to each other;
The transformation in a quantum computer becomes all possible positive transformations. After obtaining the output state, the quantum computer performs certain measurements on the output state and gives the calculation results.
It can be seen from this that quantum computing has greatly expanded classical computing, which is a special type of quantum computing. The most essential features of quantum computing are quantum superposition and quantum coherence.
The transformation implemented by a quantum computer on each superimposed component is equivalent to a classical calculation. All these classical calculations are completed at the same time and are superimposed at a certain probability amplitude to give the output result of the quantum computer. This calculation is called quantum parallel computing.
Quantum computers have very obvious advantages over traditional computers; quantum characteristics may break through the limits of existing classic information systems in terms of improving computing speed, ensuring information security, increasing information capacity and improving detection accuracy.
A memory of 250 qubits (constituted of 250 atoms) may store up to 250 power, which is more than the total number of atoms in the existing known universe.
To use quantum search algorithms to attack existing cryptographic systems, classical calculations require 1,000 years of computing, while quantum computers only take less than 4 minutes.
The quantum key system uses quantum states as information carriers, and its security is guaranteed by the principles of quantum mechanics.
Based on the quantum teleportation process, multi-terminal distribution operations can be realized to form the quantum Internet.
...
"Are you worried about how to improve the efficiency of quantum encoding?"
Liu Qingquan has always been very concerned about quantum computers. Although quantum computers seem to be simpler than quantum foam bombs and quantum communication, in fact, quantum computers have very powerful functions, but their calculations are countless times more complex than quantum communication and quantum foam bombs.
The technology included in quantum computers itself includes quantum communication technology and quantum foam technology, and also involves countless other related new quantum technologies. It is not as simple as ordinary people imagine that the calculation of quantum computers is simpler!
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Chapter completed!