Chapter 1807 Brainstorming

"parallel world?"

Li You muttered this word, but his mind was like a stormy sea and he couldn't calm down at all.

If it is a parallel world, will it involve the inconsistency of the cosmological constant?

Several other top engineers also had confused eyes and were lost in thought.

But Gu Qing did not let these "students" figure out how to solve this century-old problem on their own.

He waited for a while, seeing that there was no change in the demeanor of these people, and then he clapped gently.

The applause woke up some engineers who had not yet fallen into deep thought, but there were many more engineers who were still immersed in the thoughts in their minds.

[It is understood that once subsystems interact with each other, their states become interrelated or entangled, and it is no longer possible to treat them as independent states. In the relative state formulation, the state of each subsystem is now related to its relative state, so that each subsystem must now be viewed as related to the other subsystems with which it interacts.

Taking Schrödinger's cat as an example again, what is the mechanism by which radioactive substances decay? And if we solve this part of the quantum state, what will we get? 】

[Quantum communication is based on the basic principles of quantum physics and provides a new communication method. The core feature of this technology is that it uses the special properties of quantum states to achieve encryption and transmission of information, ensuring the security and reliability of communication. close

But according to Mr. Zhao's explanation, the theorems including the superposition and entanglement of quantum states, quantum observations and the quantum non-cloning theorem need to be reworked?

Particles in quantum mechanics can be in a superposition state, that is, they can exist in multiple states at the same time. Using this property, information can be encoded and transmitted by preparing qubits with superposition states. But should the formula for determining the state be improved, and what is the direction of improvement? 】

[When two particles are entangled, their states are related to each other, no matter how far apart they are. Using this characteristic, long-distance quantum communication can be achieved, and technologies such as quantum teleportation and quantum key distribution all come from this. We have determined that although commercial quantum communication technology and quantum chips have been successfully implemented before, However, experimental technology has been unable to make further progress. It cannot be more than three generations ahead of commercial technology, and it cannot continue to update and iterate...]

[If we follow the theory of Professor He, then the non-cloning theorem of quantum mechanics has been strengthened again, and an unknown quantum state cannot be completely copied. Perhaps using this characteristic, the technology of encrypting and protecting quantum states can go one step further to ensure the security of communication, which cannot just rely on simple digital encryption. 】

[The basic principles of quantum communication are based on the non-cloning of quantum states and the principle of observation collapse. These two principles together ensure the security of quantum communication. However, quantum communication is very sensitive to environmental noise and interference, and is extremely susceptible to external factors. .

Therefore, we need to add measures during the communication process to reduce interference fluctuations and ensure communication stability. In this way, the importance of wired transmission is self-evident.

However, when using optical fiber for communication, special interactions will also occur between photons in the optical fiber, which directly leads to transmission distance limitations. When the transmission distance exceeds a certain range, the interaction of photons will cause the quantum state to be destroyed, thereby reducing the reliability of quantum communication.

It seems that we still need to upgrade optical fiber communication, or find a wired communication material that can apply quantum communication technology]

…

Countless storms broke out in the minds of these engineers.

Waves rolled by, lightning flashed and thunder thundered, and problems appeared one after another.

Finally, because they could not solve it, some people subconsciously began to whisper their problems in a low voice.

Li You was the first to wake up from his meditative state after hearing Gu Qing's applause.

Then, he heard many colleagues starting to mutter questions in low voices.

Then, he saw his boss, Mr. Gu, treating insomnia patients like a psychotherapist and slowly speaking.

“In theory, we can view the essence of observation as the entanglement of quantum states. This kind of observation work does not necessarily require large-scale instruments that exist above the macro level. It can be completed by entangling the measured system with the microscopic quantum state. .

Within the framework of unitary evolution in quantum mechanics, the many-worlds interpretation successfully describes the observation problem without introducing any additional assumptions, thus refuting the Copenhagen interpretation.

Some scientists use "pure wave mechanics" to solve observation problems and use the "cosmic wave function" to describe the physical state of the universe. It describes the superposition of states that evolve in a perfectly continuous and linear way.

Others believe that the coexistence of branch states caused by observations means that the world will continue to split during multiple observations, but no observer will actually feel the coexistence of the various branches.

To a certain extent, this is also like Copernicus’s heliocentric theory, which predicted that our blue star is moving, but we people on the blue star, based on our own experience, can conclude that we have never directly felt the blue star. Moving conclusion.

I believe that any system that satisfies the wave equation, including observers and observation instruments, together with the entanglement mechanism, forms a logically self-consistent interpretation and allows multiple observers to coexist. "

After finishing the theory, Gu Qing snapped his fingers.

In the virtual imaging area in front of him, an independent "blackboard" circled by blue light immediately appeared in the void.

Immediately afterwards, Gu Qing began to write formulas on the "blackboard" and began to explain: "Generally speaking, we believe that the research on quantum computing and communication technology originated forty years ago. With the advent of quantum information processing and quantum With the development of technologies in communications and other related fields, as well as the field of information technology security, quantum computing and communications technology has gradually become a necessary high-level security technology for major countries.

Qubits, quantum gates, you have mastered them all.

As for quantum algorithms, due to the weakness of the theory, it is naturally impossible for the algorithm to be sophisticated.

Quantum computers use qubits and quantum gates to perform calculations. Its core feature is to achieve computational efficiency that surpasses traditional algorithms by utilizing the principles of quantum entanglement and quantum superposition.

Currently, known quantum algorithms include the quantum Melbourne spherical model QSBM algorithm and the quantum Fourier transform QFT algorithm.

The Quantum Melbourne Spherical Model (QSBM) algorithm is one of the most famous algorithms in quantum computing. It can be used to calculate the correlation between two quantum systems. However, in our previous study and in-depth research, we found that there are still some errors in this formula. There is some microdata that needs to be modified. "