CN115333642B - Remote quantum computer network application method and system based on quantum satellite - Google Patents
Remote quantum computer network application method and system based on quantum satellite Download PDFInfo
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- CN115333642B CN115333642B CN202211257824.8A CN202211257824A CN115333642B CN 115333642 B CN115333642 B CN 115333642B CN 202211257824 A CN202211257824 A CN 202211257824A CN 115333642 B CN115333642 B CN 115333642B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/70—Photonic quantum communication
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/118—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum specially adapted for satellite communication
Abstract
The invention provides a remote quantum computer network application method and system based on a quantum satellite, and relates to the technical field of quantum communication. The invention realizes the connection and communication of quantum computers between different distances by the matching use of a satellite quantum link and an optical fiber quantum link, and during short-distance transmission, the optical fiber quantum link is adopted and is connected to each common quantum computer through a hub quantum computer, thereby forming a quantum computing metropolitan area network; on the basis, when the quantum computing metropolitan area networks need to communicate with each other, the communication is carried out through a satellite quantum link more suitable for long-distance transmission, and each hub quantum computer establishes a quantum link with a quantum satellite so as to realize the communication with each other; therefore, the scheme provided by the invention has practicability, innovativeness and great popularization value.
Description
Technical Field
The invention relates to the technical field of quantum communication and quantum computer networks, in particular to a remote quantum computer network application method and system based on a quantum satellite.
Background
Quantum physics is a physical theory for describing behaviors of microscopic objects such as photons, atoms and electrons on a microscopic level, and quantum information utilizes microscopic world quantum physical characteristics to process information. A quantum computer is a computing device that utilizes quantum properties, allowing one to write, store, process, and read information encoded in quantum states. The basic information unit of quantum computation is a quantum bit, and has the quantum characteristics of superposition and entanglement.
Quantum communication and quantum computing are rapidly developed, a global quantum internet and a global quantum computer network are formed in the future. Currently, there are mainly two technical routes to establish the quantum entanglement links required for quantum connectivity: fiber quantum links and satellite quantum links.
At present, quantum computers are still in the early development stage, but in the future, like classical computers, networks of quantum computers are formed on the global scale, and quantum connection is needed for realizing transmission of quantum signals among the quantum computers. At present, two quantum computers are connected in a short distance through an optical fiber link, and as the loss of an optical fiber to a quantum signal is large, the optical fiber quantum link is short, and a quantum relay technology needs to overcome a plurality of technical difficulties for realizing kilometre quantum connection through the optical fiber link.
Due to the loss of the optical fiber to quantum signals and the fact that the optical fiber cannot depend on the traditional optical fiber amplification method under the quantum unclonable principle, the optical fiber quantum network can realize a quantum link with a longer distance only by using a quantum relay technology. However, even though quantum repeaters are used, the distance of the optical fiber quantum entanglement link is still limited to hundreds of kilometers at present, and the optical fiber quantum entanglement link is suitable for quantum networks with the size of a metropolitan area.
While satellites utilize free space to transmit entangled photons. An entangled photon source is placed on the satellite, and each photon of the entangled pair is transmitted directly to a ground station consisting of a quantum storage unit equipped with an optical interface. By receiving a photon and storing its state in quantum memory, a quantum entanglement link can be established that is directly connected to a ground station that receives the other photon of the entanglement pair. Free space is much less attenuated than optical fiber, so quantum signals can be transmitted and linked over longer distances. In recent experiments, china ink quantum satellites have demonstrated entanglement distribution over distances up to 1200 kilometers. However, the satellite quantum link needs to establish connection with the quantum satellite through a ground station, and in a network of quantum computers, it is impossible to establish a ground station for each quantum computer to link with the satellite.
Therefore, it is necessary to provide a method and a system for applying a remote quantum computer network based on quantum satellite to solve the above technical problems.
Disclosure of Invention
In order to solve one of the technical problems, the invention provides a remote quantum computer network application system based on a quantum satellite, which is deployed among quantum computers, wherein each quantum computer comprises a quantum computing unit and a classical computing unit, and the quantum computing units and the classical computing units of a single quantum computer are connected with each other to respectively execute different types of computing tasks; the quantum computing units and the classical computing units between the quantum computers are respectively and correspondingly connected, and the quantum computing units are mutually connected through a quantum entanglement link to form a remote quantum computer network; the classical calculation units are connected with each other through a classical internet; wherein the quantum entangled link comprises a satellite quantum link and an optical fiber quantum link; the optical fiber quantum link realizes a quantum entanglement link through an optical fiber line between quantum computers; the satellite quantum link includes a quantum entanglement link between a quantum computer and a quantum satellite and a quantum entanglement link between a plurality of quantum satellites.
Specifically, the remote quantum computer network comprises a plurality of quantum computing metropolitan area networks, wherein each quantum computing metropolitan area network comprises a hub quantum computer and a plurality of common quantum computers; the ordinary quantum computers respectively establish quantum entanglement links with the hub quantum computers through the optical fiber quantum links, and each quantum computing metropolitan area network establishes the quantum entanglement links between the hub quantum computers through the satellite quantum links.
As a further solution, when performing satellite quantum link communication, the satellite quantum link links a quantum computer a and a quantum computer B, which need to perform mutual communication, to each other through a quantum satellite and a ground station; and the quantum computing units of the quantum computer A and the quantum computing unit of the quantum computer B are respectively connected with the ground station A and the ground station B, wherein the quantum computer A and the quantum computing unit B are junction quantum computers.
As a further solution, the quantum computer a and the quantum computer B establish a quantum entanglement link through a quantum satellite: an entangled photon source is placed on the quantum satellite, and photons of the entangled photon source are directly transmitted to a ground station consisting of a quantum memory provided with an optical interface; the ground station receives the photons and stores the states of the photons in the quantum memory, and the ground station transmits the photons from the memory to the hub quantum computer when the hub quantum computer needs to entangle the photons, so that a quantum entanglement link between the hub quantum computers is established. As a further solution, the ground station a and the ground station B establish a quantum entanglement link between the quantum satellite and the ground station in the same way: an entangled photon source is placed on the quantum satellite, and each photon of the entangled photon source is directly transmitted to a ground station consisting of a quantum memory provided with an optical interface; the ground station establishes a quantum entanglement link between the quantum satellite and the ground station by receiving photons and storing the states of the photons in a quantum memory.
As a further solution, when performing optical fiber quantum link communication, the optical fiber quantum link connects a quantum computer C and a quantum computer D, which need to perform mutual communication, to each other through an optical fiber line; the quantum computing units of the quantum computer C and the quantum computing unit of the quantum computer D are respectively connected directly through an optical fiber line or connected through a quantum relay; the quantum computer C and the quantum computer D are both common quantum computers; or any one of the two is a hub quantum computer, and the other is a common quantum computer under the quantum computing metropolitan area network where the current hub quantum computer is located.
As a further solution, the optical fiber quantum link is used to establish a quantum entanglement link in the order of hundreds of kilometers; the satellite quantum link is used for establishing a kilometre quantum entanglement link.
As a further solution, the satellite quantum link also performs the distance extension of the quantum entanglement link by setting a relay satellite; one or more relay satellites are arranged and are in chain connection with the quantum satellite to obtain a satellite link; one end of the satellite link transmits entangled light to the ground station A or establishes a quantum entangled link, the other end transmits entangled light to the ground station B or establishes a quantum entangled link, and when satellite quantum link communication is carried out, communication information is transmitted through the satellite link.
As a further solution, the classic computing unit is set by adopting a traditional silicon-based chip computer, and the classic Internet is adapted to various Internet communication protocols and transmits and shares information through the Internet in a wired and/or wireless connection mode.
A remote quantum computer network application method based on quantum satellite, apply to a remote quantum computer network application system based on quantum satellite as above-mentioned any one, including responding to the quantum computation service request, choose the goal quantum computer in the remote quantum computer network application system according to the said service request, the goal quantum computer carries on the quantum computation task to cooperate through the quantum entanglement link, finish the corresponding quantum computation task and offer the computational result to users; the quantum entanglement link comprises a satellite quantum link and an optical fiber quantum link.
As a further solution, when two quantum computers which need to communicate with each other are in the same quantum computing metropolitan area network, the two quantum computers directly establish a quantum entanglement link through a hub quantum computer of the current quantum computing metropolitan area network; the quantum entanglement links are all arranged through the optical fiber quantum links, and information transmission and sharing are completed.
As a further solution, when two quantum computers that need to communicate with each other are in different quantum computing metropolitan area networks, the two quantum computers first establish a quantum entanglement link with a hub quantum computer of each quantum computing metropolitan area network through an optical fiber quantum link, and the hub quantum computer of each quantum computing metropolitan area network then establishes a quantum entanglement link through a satellite quantum link, and completes transmission and sharing of information.
Compared with the related technology, the quantum satellite-based remote quantum computer network application method and system provided by the invention have the following beneficial effects:
the invention realizes the connection and communication of quantum computers between different distances by the matching use of a satellite quantum link and an optical fiber quantum link, and during short-distance transmission, the optical fiber quantum link is adopted and is connected to each common quantum computer through a hub quantum computer, thereby forming a quantum computing metropolitan area network; on the basis, when the quantum computing metropolitan area networks need to communicate with each other, the communication is carried out through a satellite quantum link more suitable for long-distance transmission, and each hub quantum computer establishes a quantum link with a quantum satellite so as to realize the communication with each other; therefore, the scheme provided by the invention has practicability, innovativeness and great popularization value.
Drawings
Fig. 1 is a schematic diagram of an overall structure of a remote quantum computer network application system based on a quantum satellite according to the present invention;
FIG. 2 is a diagram of a satellite quantum link structure of a remote quantum computer network application system based on quantum satellite according to the present invention;
fig. 3 is a relay satellite link diagram of a remote quantum computer network application system based on a quantum satellite according to the present invention.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.
As shown in fig. 1 to fig. 3, a remote quantum computer network application system based on a quantum satellite according to the present invention is deployed between quantum computers, where the quantum computers include a quantum computing unit and a classical computing unit, and the quantum computing unit and the classical computing unit of a single quantum computer are connected to each other to respectively execute different types of computing tasks (in one possible embodiment, the quantum computing unit is configured to execute a computing task based on a specific quantum computing algorithm, and the classical computing unit is configured to execute a corresponding auxiliary computing task; the quantum computing units and the classical computing units between the quantum computers are respectively and correspondingly connected, and the quantum computing units are mutually connected through a quantum entanglement link to form a remote quantum computer network; the classical calculation units are connected with each other through a classical internet; wherein the quantum entangled link comprises a satellite quantum link and an optical fiber quantum link; the optical fiber quantum link realizes a quantum entanglement link through an optical fiber line between quantum computers; the satellite quantum link includes a quantum link between a quantum computer and a quantum satellite and a quantum entangled link between a plurality of quantum satellites.
Specifically, the remote quantum computer network comprises a plurality of quantum computing metropolitan area networks, wherein each quantum computing metropolitan area network comprises a hub quantum computer and a plurality of common quantum computers; the ordinary quantum computers respectively establish quantum entanglement links with the hub quantum computers through the optical fiber quantum links, and each quantum computing metropolitan area network establishes the quantum entanglement links between the hub quantum computers through the satellite quantum links.
It should be noted that: the existing optical fiber quantum link can realize a quantum entanglement link with a longer distance only by using a quantum relay technology; however, even though quantum repeaters are used, the distance of the optical fiber quantum entanglement link is still limited to hundreds of kilometers at present, and the optical fiber quantum entanglement link is suitable for quantum networks of metropolitan areas. Therefore, the traditional optical fiber quantum link cannot meet the quantum communication requirement of thousands of kilometers or more; and the quantum satellite can realize long-distance quantum entanglement link to cover a network of kilometre level, has obvious advantages in entanglement distribution compared with a network based on optical fiber, is easier to connect any two long-distance nodes, and has obvious advantages in realizing the global quantum internet.
Therefore, in the present embodiment, a remote quantum computer network is formed by a satellite quantum link and an optical fiber quantum link, as shown in fig. 1, during short-distance transmission, an optical fiber quantum link is adopted, and the optical fiber quantum link is connected to each ordinary quantum computer through a hub quantum computer, so as to form a quantum computing metropolitan area network; on the basis, when the quantum computing metropolitan area networks need to communicate with each other, the communication is carried out through a satellite quantum link more suitable for long-distance transmission, and each hub quantum computer establishes a quantum link with a quantum satellite so as to realize the communication with each other.
Supplementary explanation: the quantum computers directly connected with the satellite quantum links are called hub quantum computers, the distance between the hub quantum computers is usually in the kilokilometer level, and the hub quantum computers are connected to form a quantum computing backbone network. The pivot quantum computer nodes are connected with other quantum computers to form a hundred-kilometer quantum computer metropolitan area network and a smaller quantum computer metropolitan area network on the ground, each pivot quantum computer in the quantum computer metropolitan area network is connected with other quantum computers through optical fibers in a quantum mode, therefore, the pivot quantum computers can be connected with a long-distance quantum computer metropolitan area network through satellite quantum links, and quantum entanglement connection of any two long-distance quantum computers can be achieved by combining the optical fiber quantum links.
In addition, the complete quantum computer comprises a classical calculation unit, the classical calculation unit is used for controlling the quantum calculation unit and completing a classical calculation task, the quantum calculation unit and the classical calculation unit are tightly connected with each other, and the remote classical computers are connected through a traditional classical internet. The embodiment aims to solve the problem of communication network between quantum computers, and the existing classical internet connection is directly adopted for communication between classical computing units.
As a further solution, when performing satellite quantum link communication, the satellite quantum link links a quantum computer a and a quantum computer B, which need to perform mutual communication, to each other through a quantum satellite and a ground station; the quantum computing units of the quantum computer A and the quantum computing unit of the quantum computer B are respectively connected with a ground station A and a ground station B, the ground station A and the ground station B respectively establish a quantum entanglement link with a quantum satellite or receive entangled light emitted by the quantum satellite, and the quantum computer A and the quantum computing unit B are both junction quantum computers.
As shown in fig. 2, a quantum satellite distributes an entangled quantum signal to a quantum computer on the ground to realize kilometre quantum connection, where quantum computer a and quantum computer B both refer to any two quantum computers that need to establish remote communication, rather than specific reference numbers, that is: the huge remote quantum computer network can be decomposed into a quantum computer A and a quantum computer B which are connected in a pairwise communication mode; similarly, the ground station a and the ground station B are not specific reference numerals, but refer to ground stations corresponding to the quantum computer a and the quantum computer B.
As a further solution, the quantum computer a and the quantum computer B establish a quantum entanglement link through a quantum satellite: an entangled photon source is placed on the quantum satellite, and photons of the entangled photon source are directly transmitted to a ground station consisting of a quantum memory provided with an optical interface; the ground station receives the photons and stores the states of the photons in the quantum memory, and the ground station transmits the photons from the memory to the hub quantum computer when the hub quantum computer needs to entangle the photons, so that a quantum entanglement link between the hub quantum computers is established. Or, the ground station a and the ground station B establish a quantum entanglement link between the quantum satellite and the ground station in the same way: an entangled photon source is placed on the quantum satellite, and each photon of the entangled photon source is directly transmitted to a ground station consisting of a quantum memory provided with an optical interface; the ground station establishes a quantum entangled link between the quantum satellite and the ground station by receiving photons and storing the states of the photons in a quantum memory.
As a further solution, when performing optical fiber quantum link communication, the optical fiber quantum link connects a quantum computer C and a quantum computer D, which need to perform mutual communication, to each other through an optical fiber line; the quantum computing units of the quantum computer C and the quantum computing unit of the quantum computer D are respectively connected directly through an optical fiber line or connected through a quantum relay; the quantum computer C and the quantum computer D are both common quantum computers; or any one of the two is a hub quantum computer, and the other is a common quantum computer under the quantum computing metropolitan area network where the current hub quantum computer is located.
As a further solution, the optical fiber quantum link is used to establish a quantum entanglement link in the order of hundreds of kilometers; the satellite quantum link is used for establishing a kilometre quantum entanglement link.
As a further solution, the satellite quantum link also performs the distance extension of the quantum entanglement link by setting a relay satellite; one or more relay satellites are arranged and are in chain connection with the quantum satellite to obtain a satellite link; one end of the satellite link transmits entanglement light to a ground station A, and the other end of the satellite link transmits entanglement light to a ground station B; or one end of the satellite link and the ground station A establish a quantum entanglement link, the other end of the satellite link and the ground station B establish the quantum entanglement link, and when the satellite quantum link is in communication, communication information is transmitted through the satellite link.
It should be noted that: if a longer-distance satellite link needs to be connected, a method of adding a satellite relay can be adopted, as shown in fig. 3, two quantum satellites are taken as an example, and in practice, the quantum satellites can be added according to needs.
As a further solution, the classical computing unit is configured by adopting a traditional silicon-based chip computer, and the classical internet is adapted to various internet communication protocols and transmits and shares information through the internet in a wired and/or wireless connection mode.
A remote quantum computer network application method based on quantum satellite, apply to a remote quantum computer network application system based on quantum satellite as above-mentioned any one, including responding to the quantum computation service request, choose the goal quantum computer in the remote quantum computer network application system according to the said service request, the goal quantum computer carries on the quantum computation task to cooperate through the quantum entanglement link, finish the corresponding quantum computation task and offer the computational result to users; the quantum entanglement link comprises a satellite quantum link and an optical fiber quantum link; quantum computing tasks include, but are not limited to, data searching and prime factorization of large numbers using the quantum shor algorithm.
As a further solution, when two quantum computers which need to communicate with each other are in the same quantum computing metropolitan area network, the two quantum computers directly establish a quantum entanglement link through a hub quantum computer of the current quantum computing metropolitan area network; the quantum entanglement links are all arranged through the optical fiber quantum links, and information transmission and sharing are completed.
As a further solution, when two quantum computers that need to communicate with each other are in different quantum computing metropolitan area networks, the two quantum computers first establish a quantum entanglement link with a hub quantum computer of each quantum computing metropolitan area network through an optical fiber quantum link, and the hub quantum computer of each quantum computing metropolitan area network then establishes a quantum entanglement link through a satellite quantum link, and completes transmission and sharing of information.
It should be noted that: in the embodiment, the connection and communication of quantum computers between different distances are realized by the matching use of a satellite quantum link and an optical fiber quantum link, and during short-distance transmission, the optical fiber quantum link is adopted and is connected to each common quantum computer through a hub quantum computer, so that a quantum computing metropolitan area network is formed; on the basis, when the quantum computing metropolitan area networks need to communicate with each other, the communication is carried out through a satellite quantum link more suitable for long-distance transmission, and each hub quantum computer establishes a quantum link with a quantum satellite so as to realize the communication with each other; therefore, the scheme provided by the embodiment has practicability, innovativeness and great popularization value.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A remote quantum computer network application system based on quantum satellite is deployed among quantum computers, and is characterized in that the quantum computers comprise quantum computing units and classical computing units, and the quantum computing units and the classical computing units of a single quantum computer are closely connected with each other to respectively execute different types of computing tasks; the quantum computing units and the classical computing units between the quantum computers are respectively and correspondingly connected, and the quantum computing units are mutually connected through a quantum entanglement link to form a remote quantum computer network; the classical computing units are connected with each other through a classical internet; wherein the quantum entangled link comprises a satellite quantum link and an optical fiber quantum link; the optical fiber quantum link realizes a quantum entanglement link through an optical fiber line between quantum computers; the satellite quantum link comprises a quantum entanglement link between a quantum computer and a quantum satellite and quantum entanglement links between a plurality of quantum satellites;
the remote quantum computer network comprises a plurality of quantum computing metropolitan area networks, and each quantum computing metropolitan area network comprises a hub quantum computer and a plurality of common quantum computers; the ordinary quantum computer establishes quantum entanglement links with the hub quantum computer through the optical fiber quantum links, and each quantum computing metropolitan area network establishes the quantum entanglement links between the hub quantum computers through the satellite quantum links;
the quantum computing system can respond to a quantum computing service request, and a target quantum computer in a remote quantum computer network application system is selected according to the service request, and the target quantum computer performs quantum computing task cooperation through a quantum entanglement link to complete a corresponding quantum computing task and provide a computing result for a user;
when satellite quantum link communication is carried out, the satellite quantum link mutually links a quantum computer A and a quantum computer B which need to be mutually communicated through a quantum satellite and a ground station; quantum computing units of the quantum computer A and the quantum computer B are respectively connected with a ground station A and a ground station B, the ground station A and the ground station B respectively receive entangled light emitted by a quantum satellite or establish a quantum entangled link with the quantum satellite, and the quantum computer A and the quantum computer B are both junction quantum computers;
the ground station A and the ground station B establish a quantum entanglement link between the quantum satellite and the ground station in the same way: an entangled photon source is placed on the quantum satellite, and photons of the entangled photon source are directly transmitted to a ground station consisting of a quantum memory provided with an optical interface; the ground station establishes a quantum entanglement link between the quantum satellite and the ground station by receiving photons and storing the states of the photons in a quantum memory.
2. The quantum satellite-based remote quantum computer network application system of claim 1, wherein in the case of optical fiber quantum link communication, the optical fiber quantum link connects a quantum computer C and a quantum computer D, which need to communicate with each other, to each other through an optical fiber line; the quantum computing units of the quantum computer C and the quantum computing unit of the quantum computer D are respectively connected directly through an optical fiber line or connected through a quantum relay; the quantum computer C and the quantum computer D are both common quantum computers, or one of them is a hub quantum computer, and the other is a common quantum computer under the quantum computing metropolitan area network where the current hub quantum computer is located.
3. The quantum satellite-based remote quantum computer network application system of claim 1, wherein the optical fiber quantum link is used for establishing a quantum entanglement link of hundreds of kilometers; the satellite quantum link is used for establishing a kilometre quantum entanglement link.
4. The quantum satellite-based remote quantum computer network application system of claim 1, wherein the satellite quantum link further performs quantum entanglement link distance extension by setting a relay satellite; one or more relay satellites are arranged and are in chain connection with the quantum satellite to obtain a satellite link; one end of the satellite link transmits entangled light to the ground station A or establishes a quantum entangled link, and the other end transmits entangled light to the ground station B or establishes the quantum entangled link.
5. The quantum satellite-based remote quantum computer network application system of claim 1, wherein the classical computing unit is configured by using a traditional silicon-based chip computer, and the classical internet is adapted to various internet communication protocols and transmits and shares information through the internet by means of wired and/or wireless connection.
6. The quantum-satellite-based remote quantum computer network application system of claim 1, wherein when two quantum computers that need to communicate with each other are in the same quantum computing metropolitan area network, the two quantum computers directly establish a quantum entanglement link through a hub quantum computer of the current quantum computing metropolitan area network; the quantum entanglement links are all arranged through the optical fiber quantum links, and information transmission and sharing are completed.
7. The quantum-satellite-based remote quantum computer network application system of claim 1, wherein when two quantum computers that need to communicate with each other are in different quantum computing metropolitan area networks, the two quantum computers first establish a quantum entanglement link with a hub quantum computer of each quantum computing metropolitan area network through an optical fiber quantum link, and the hub quantum computer of each quantum computing metropolitan area network then establishes a quantum entanglement link through a satellite quantum link, and completes transmission and sharing of information.
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