The Technology Tree of Xueba

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Zhou Yu walked into the quantum computer laboratory. He knew that the quantum computer prototype had been developed.

Quantum computer prototypes can perform various functions expected by quantum computers, and quantum computer projects can be declared successful.

The quantum computer they developed was only 30 qubits.

This is just a barely available quantum computer. In the future, the quantum computer laboratory will develop a quantum computer with hundreds of thousands of qubits.

Zhou Yu came to a 500-square-meter dust-free laboratory with a huge device lying in the center of the laboratory.

In the center is a huge sphere with a diameter of two meters. It is the most conspicuous. Many researchers are looking at the parameters around it. At first glance, it is the core device of a quantum computer.

At the top left of the laboratory is a coiled pipe, which looks like a large mosquito coil placed on the ground.

To the right of the laboratory was a row of lighted cabinets, which occupied almost a quarter of the laboratory.

Zhou Yu walked directly to the big ball, young people about his age.

The young man kept the plate, wearing a lab anti-static lab coat, and staring at the data displayed by the big ball.

This person is Zhang Wei, director of the Quantum Computer Lab, and a proud student of Academician Pan.

Because of making friends with AIDS accidentally, he took the initiative to resign from the laboratory of the Chinese Academy of Sciences, and then came to know the scientists in the process of treatment at the Spark Technology Research Center.

Zhang Wei was recruited by the academician Tian Kai to the quantum computer laboratory and soon became a leader in the quantum computer laboratory by virtue of his ability.

Academician Tian Kai walked over and said, "Zhang Wei, please introduce me and Quan Zhou to quantum computers."

"Very good Zhou, good Director Tian."

Zhang Wei pointed at the huge sphere around him and said, "This device is the quantum coherent sphere at the core of a quantum computer."

The most essential characteristics of quantum computing are quantum superposition and quantum coherence.

The transformation that a quantum computer implements for each superimposed component is equivalent to a classic calculation, and all these classic calculations are done at the same time. This is the quantum parallel operation of a quantum computer.

Whether it is quantum parallel computing or quantum simulation computing, quantum coherence is essentially used.

Zhang Wei proudly said: "As we all know, quantum computers can achieve their functions by relying on quantum coherence.

However, quantum coherence is difficult to maintain in practical systems.

In quantum computers, qubits are not an isolated system. They interact with the external environment and cause the attenuation of quantum coherence, that is, decoherence.

If we want to make quantum computing a reality, one of the core problems is to overcome decoherence.

This device is specifically designed to overcome quantum computer quantum decoherence and allow qubits to perform quantum parallel operations and quantum simulation calculations. "

Zhou Yu smiled, and he finally found out what he knew.

"I know that quantum coding is the most effective way to overcome decoherence that has been discovered so far.

The main quantum coding schemes are quantum error correction codes, quantum error avoidance codes and quantum error prevention codes.

Which coding scheme do you use? Is this the coding scheme they have worked with with Director Wei Tianpeng? "

Zhou Yu was a bit surprised. They kept their secrets too well. Generally, Zhou Yu only focused on the key progress.

However, it involves the cooperation of multiple laboratories. As the director of the Science and Technology Committee of Spark Technology, he is responsible for coordinating the laboratories. He basically understands any cooperation.

Zhang Wei froze and explained with a smile: "General Zhou, we did not use quantum coding to solve the decoherence problem.

This solution is completely a trap, which is an important reason why a true quantum computer has not yet been developed.

The quantum coding scheme is only through coding, that is, a software scheme, to artificially compensate for the missing part of the qubit information.

Quantum mechanics explains that the quantum is in Schrödinger's cat state at all times, and it cannot be observed at all. It is subjectively supplemented by coding, which completely destroys the state of the quantum.

The results calculated by this kind of quantum computer must be incomplete, and the main capabilities of a quantum computer cannot be fully used. "

Academician Tian Kai reminded: "Zhang Wei, what do you explain! Explain directly how your coherent ball works.

The basic operation of this quantum computer prototype is what we want to know. "

Zhang Wei said entangledly: "After the first inspection by Zhou, I was a little nervous.

This is also the habit I brought from the Chinese Academy of Sciences, and the leaders there liked to explain it like this.

The more esoteric they are, the more unclear they are. Therefore, they feel that this project is promising and will increase investment in this project. "

Zhang Wei said this, immediately alleviating the slightly awkward atmosphere at the scene.

He also briefly explained the principle of the operation of quantum coherent spheres. In fact, it is very simple. The two most significant forces in the microscopic field are the strong interaction force and the weak interaction force.

Quantum decoherence is because the external system affects the qubit, so he uses a strong interaction force and a weak interaction force to form a force balance system.

The qubit at the equilibrium point, which is canceled by external influences, is slightly equal to being unaffected.

This method is the most universal and efficient method at this stage.

It cannot completely offset the influence of the outside world on qubits, but it can minimize this effect and allow qubits to achieve the maximum coherence.

Zhang Wei said gratefully: "I also want to thank Zhao Zhao, a scientist at the Neutrino Laboratory.

He inspired me by capturing neutrinos with weak interactions through heavy particles. I can develop quantum coherent spheres. "

As soon as Zhou Yu clapped his hands, he said excitedly, "I can easily understand that you say that it is not the Lagrange point of a celestial body, and the object at this point is in a state of gravitational equilibrium."

Zhang Wei's face showed a startled expression. The gap between astronomical mechanics and quantum mechanics was too big. These are two things that are completely incompatible. UU reading www.uukanshu. com

"Principles vary widely, but the effect is similar, trying to keep the qubits in balance with external systems."

Seeing Zhang Wei's helpless face, Zhou Yu knew that he had just said something wrong.

He wanted to continue to understand the situation of the quantum computer prototype, and suddenly thought that the quantum coherent sphere is the core device of the quantum computer.

As long as this technology is obtained, it can be judged whether this kind of quantum computer development route is feasible.

"Director Zhang Wei, show me the principle of quantum coherent sphere technology, and I understand how you implement this technology."

Zhang Wei used Xingling glasses to send Zhou Yu the technical principles of quantum coherent spheres. The expression on his face was strange, and he was curious with disbelief.

He believed that Zhou Yu could not understand the technical principles of quantum coherent spheres at all.

Zhou Yu carefully read the technical principles of quantum coherent spheres. He understood a little bit, and the golden tree was constantly raining in the space of the technology tree in his mind.

The technology tree digests this knowledge and feeds it back to Zhou Yu, who can understand the next knowledge.

Through this positive feedback method, Zhou Yu quickly digested the knowledge of quantum coherent spheres.

The technology tree was shaking in my mind, and part of the quantum computer technology was grown in the computer technology area.

Zhou Yu instantly learned of more advanced quantum coherent sphere technology.

He also knew that this kind of quantum computer development path was completely correct.

Zhou Yu stared at Zhang Wei with a smile on his face, then it was time for him to show his skills.

When Academician Tian Kai saw Zhou Yu's expression, he looked at Zhang Wei with caring eyes. Don't be hit for a while.

At the same time, many fragments emerged in his mind. They used to discuss the technology with Zhou Yu. I thought Zhou Yu didn't understand this technology.

Unexpectedly, Zhou Yu interpreted this technology from an alternative perspective and helped himself solve the technical difficulties.

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