Chu Qian said: "The information of the entire galaxy may be projected to a certain area, and then we establish contact with this area. This area is called a transit pool. It is like a signal base station. That is, to communicate with other parts of the galaxy, of course we I don’t dare to communicate yet, it’s just for testing and observation.”
What is now called mapping network communication uses a transit pool. Each transit pool can contain one or more zones depending on the mapped network it is connected to. The area covered can reach thousands of light-years. Controlled by the transit pool controller, the coverage area is usually reduced to avoid interference with adjacent transit pools. The relay module mainly completes functions such as signal processing and resource allocation. The transceiver module is mainly responsible for signal reception and signal conversion. It receives signals from other distant galaxies to the transfer pool, and then converts the signals and transmits them to nearby galaxies.
Understanding the mapped space communication of relay pools from the perspective of quantum communication. Quantum communication is based on the assumption that two quanta with the same shape, no matter how far apart they are in the universe, as long as one of them changes, the other will also change exactly the same.
The dissemination of general information requires a carrier. Conversations between people need to be propagated through sound. Signals must be transmitted between mobile phones and base stations through electromagnetic waves. Information transmission on the Internet also requires optical signals transmitted in optical cables. In the quantum world, with the help of entangled photons, quantum state teleportation can be achieved without a carrier.
Quantum state refers to the state of particles such as atoms, neutrons, and protons. It can represent the energy, rotation, motion, magnetic field, and other physical properties of particles. Quantum entanglement refers to the existence of a certain entangled relationship between two microscopic particles with a common origin in quantum mechanics. No matter how far apart they are, as long as one particle changes, the state of the other particle will immediately change accordingly. The change.
Mapping space communication is similar to quantum communication, but there are many differences. It is a mapping of the entire space. The information from transit pool A is transmitted to transit pool B across tens of thousands of light years.
The relay module mainly completes functions such as signal processing and resource allocation. The transfer module originally allocates information resources to a limited number of receivers. If assigned to two receiving ends, and a third machine receives this information, some people speculate that the information may be destroyed and may be discovered. Also, I don’t know who this message is intended to be sent to.
Understand from the perspective of quantum communication. When energy or matter is so small that it cannot be measured accurately. Because measurement means interference, when the object being measured reaches its limit, it cannot be completely changed without being measured. A microscope that is theoretically perfect to the extreme is helpless against a particle at the quantum level, because a single touch destroys the state of the particle to be measured. If quantum state particles are allowed to carry cryptographic information, they will not be monitored halfway.
"Heisenberg Uncertainty Principle" is the basic principle of quantum mechanics. It means that it is impossible to measure the position and momentum of a quantum at the same time with the same accuracy. Only one of the two can be accurately measured. The "Single Quantum Non-Copiable Theorem" is a corollary of the "Heisenberg Uncertainty Principle". It means that it is impossible to copy a single quantum without knowing the quantum state, because to copy a single quantum, you can only measure it first. And measurement will inevitably change the state of the quantum.
Using quantum state as a key is non-replicable and can be said to be absolutely safe. Any operation that intercepts or tests a quantum key changes the quantum state. In this way, the interceptor gets only meaningless information, and the legitimate recipient of the information can also know that the key has been intercepted from the change in the quantum state. Scientists hope to achieve long-distance, high-speed quantum cryptography transmission in the future. Quantum keys are difficult to apply, making it difficult for a pair of entangled particles to remain stable over long distances. A key that is valid within a few meters will be distorted a few kilometers away.
The Institute of Optics is studying how to obtain information without destroying the original information.
Chu Qian said: "It's like a courier sent from A to B. You want to see what is in this courier."
Qi Yanliang said: "Take it apart and take a look, then wrap it up again?"
Chu Qian said: "It will definitely be discovered."
Qi Yanliang said: "Shine it with light?"
Chu Qian said: "This will destroy the things inside."
Qi Yanliang said: "Add an electric current, add a magnetic field, etc."
Chu Qian said: "This will also damage the things inside."
Qi Yanliang said: "At present, we only use rays similar to cosmic rays in the nearby environment to detect information and avoid being discovered. In this way, if there is damage in time, the civilization at the transmitting end will also think that this is the interference of cosmic rays. Rather than other civilizations doing the testing.”
Qi Yanliang said: "You can think of any method."
Cosmic rays are charged, high-energy subatomic particles coming from outer space. They may produce secondary particles that penetrate the Earth's atmosphere and surface. The main primary cosmic rays, the particle components from deep space and atmospheric collisions, are generally stable particles on Earth, such as protons, atomic nuclei, or electrons. There are a very small proportion of stable antimatter particles, including positrons or antiprotons.
About 89% of cosmic rays are pure protons, 10% are helium nuclei, or alpha particles, and 1% are heavy elements. These nuclei make up 99% of cosmic rays. Electrons, like beta particles, make up most of the remaining 1%; gamma rays and ultra-high-energy neutrinos make up only a tiny fraction.
The optical system in the transceiver module is used for imaging and communication. The complex amplitude distribution or light intensity distribution on the object plane is obtained from the complex amplitude distribution or light intensity distribution on the image plane. Communication systems are used to collect, process, and transmit information. This information generally changes with time, such as a modulated voltage or light waveform. From the perspective of communication theory, the complex amplitude distribution or light intensity distribution on the object plane can be regarded as input information, and the object plane is called the input plane; the complex amplitude distribution or light intensity distribution on the image plane can be regarded as is the output information, and the image plane is called the output plane. The role of the optical system is to transform input information into output information, but the information transmitted and processed by the optical system is a function that changes with space, while the signals transmitted and processed by the communication system are a function that changes with time.
The similarity between optical systems and ordinary communication systems is not only that both are used to transmit and transform information, but also that both systems have some of the same basic properties, such as linearity and space, time invariance, etc., so they can both be used Spectral analysis methods are used to describe and analyze. Many classic concepts and methods of communication theory, such as filtering, signal extraction from noise, correlation, convolution, etc., have been applied to optics, especially in the fields of optical transfer function, optical information processing, holographic technology and other fields.
