CN116170082A - Quantum communication method integrating communication time service - Google Patents
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Abstract
According to the quantum communication method integrating communication and time service, provided by the invention, the communication parties are provided with the atomic clock, the time interval counter, the entanglement light source and other modules, the quantum safety time synchronization is realized through the steps of quantum entanglement distribution, single photon detection, coincidence measurement and the like, the quantum communication is realized through the steps of quantum entanglement distribution, single photon detection, unitary transformation and the like, the clock synchronization of the communication parties is controlled based on the quantum safety time synchronization, and the clock information of the communication parties is interacted based on the quantum communication. The invention realizes synchronous operation of two different service functions by utilizing a single quantum entanglement distribution system, simultaneously realizes integrated design of communication time service from an information layer and a physical layer, and provides important support for promoting function expansion of quantum communication equipment and rapid deployment of a quantum network.
Description
Technical Field
The invention belongs to the interdisciplines of quantum communication and quantum time service, in particular to a method for distributing entangled photons to two communication parties through a quantum entanglement distribution system and simultaneously realizing quantum safety communication and quantum safety time synchronization through coincidence measurement of the entangled photons, and particularly relates to a quantum communication method integrating communication and time service.
Background
The quantum is the minimum unit of energy, and satisfies the quantum inseparable principle, the quantum unclonable principle and the Hessenberg measurement inaccuracy principle. The quantum-based information transmission technology, such as quantum security communication technology, quantum security time synchronization technology and the like, can have unconditional security characteristics at a channel level, namely an eavesdropper cannot acquire information content by separating quanta under the condition of not causing awareness of both communication parties.
Quantum communication systems typically use photons as information carriers, encoding information in different degrees of freedom of the photons, and different quantum communication protocols can be implemented. The quantum communication protocol represented by E91 is based on the quantum entanglement principle, entangled photons are distributed to two communication parties through a quantum entanglement distribution system, and information transmission is realized through unitary transformation of the entangled photons. On the other hand, the quantum entanglement distribution system can also be used for realizing quantum security time synchronization, entangled photons are sent to the opposite sides by the two sides of communication by taking respective clocks as references, clock difference is determined by coincidence measurement and is input into a clock regulation and control system to realize clock synchronization of the two sides of communication, and compared with the traditional time synchronization technology, the quantum security time synchronization has the advantages of security, reliability, high precision and the like, namely inherent anti-interception and anti-tampering capability of quantum communication is inherited, optical quantum signals are natural and anti-electromagnetic interference, and the precision can break through physical bottlenecks.
In practical application, the communication and time service processes cannot be strictly separated, the information interaction in the communication system requires the same clock of both communication parties, and the time service process cannot be completely separated from the communication interaction. On the other hand, entangled photons are important channel resources for quantum communication and quantum teaching, and it is important to improve the utilization rate.
Disclosure of Invention
Aiming at the defects, the technical problem to be solved by the invention is how to utilize the quantum entanglement distribution system to send entangled photons to both communication parties, realize two different functions of quantum communication and quantum safety time synchronization through different operations on the entangled photons, realize parallel operation of the quantum communication and quantum safety time synchronization functions through wavelength division multiplexing or time division multiplexing, realize time synchronization information interaction through quantum communication, complete clock synchronization of quantum communication through time synchronization, and achieve communication time service integration function.
In view of the above-mentioned drawbacks, an object of the present invention is to provide a quantum communication method integrating communication and time service, which provides quantum state distribution transmission resources for both communication parties, and distributes quantum resources for both communication parties by entanglement of quantum light sources; the entangled photons of both communication parties are controlled by time division multiplexing or wavelength division multiplexing, so that different service functions are executed; different service functions are completed through different operations on entangled photons, clock difference calculation is realized through bidirectional coincidence measurement on entangled photons, and communication encoding and decoding processes are completed through unitary transformation on entangled photons; communication clock synchronization is realized through quantum time synchronization, and time synchronization system information interaction is completed through quantum communication, so that communication time service integration is realized.
Preferably, the entanglement degree of freedom is one or more of polarization, phase, time bit, mode field and frequency.
Preferably, the time division multiplexing refers to controlling entangled photons in a period such that they undergo/not undergo a communication encoding process.
Preferably, the wavelength division multiplexing refers to generating multiple wavelength entangled photons, and only controlling specific wavelength entangled photons to undergo a communication encoding process.
Preferably, the method specifically comprises the following steps:
s1, quantum communication, namely distributing entangled photons to two communication parties through a quantum entanglement distribution system, and completing a quantum communication process through unitary transformation of the entangled photons;
s2, quantum safety time synchronization, namely distributing entangled photons to two communication parties through a quantum entanglement distribution system, and realizing time synchronization through counting time intervals of the entangled photons after bidirectional transmission;
s3, communication time service is integrated, interaction information required by time synchronization is transmitted through quantum communication, quantum communication is controlled through a clock calibrated by quantum security time synchronization, and integrated fusion of two services in an information layer and a physical layer is achieved.
Preferably, the two communication parties are provided with an atomic clock, a time interval counter and an entanglement light source module, quantum safety time synchronization is realized through quantum entanglement distribution, single photon detection and coincidence measurement, quantum communication is realized through quantum entanglement distribution, single photon detection and unitary transformation, clock synchronization of the two communication parties is controlled based on quantum safety time synchronization, and clock information of the two communication parties is interacted based on quantum communication.
Preferably, the method specifically comprises the following steps:
s101, a quantum entanglement light source, a single photon detector, a time interval counter, a quantum communication modulation module, a quantum communication demodulation module and a local clock are arranged on both communication parties;
s102, generating entangled photons through a quantum entanglement light source, wherein one path is reserved locally, and the other path is sent to a communication opposite end; entangled photons are divided into two types through a time division multiplexer, one type is used for quantum communication, and the other type is used for quantum safety time synchronization;
s103, when the system works in a quantum communication mode, locally reserved entangled photons are directly detected by a single photon detector, photons sent to a communication opposite end are encoded by a modulator and sent to the communication opposite end through an optical fiber circulator, and after the communication opposite end receives the signal, the signal is demodulated by a demodulation module and detected by the single photon detector; the communication process can be completed by the information interaction of the two communication parties through classical channels;
s104, when the system works in a quantum safety time synchronization mode, the locally reserved entangled photons are still directly detected by a single photon detector, photons sent to a communication opposite end are sent to the communication opposite end through an optical fiber circulator by taking a local clock signal as a reference, after the communication opposite end receives the signals, the signals are directly detected by the single photon detector, the clock difference of the two communication sides can be calculated through coincidence measurement of a time interval counter, and the time synchronization process is completed;
s105, if the quantum communication working service mode duration is inconsistent with the time division multiplexer starting duration, a certain clock difference exists between the two communication parties, and the quantum communication working service mode duration is utilized to the maximum extent through quantum safety time synchronization; the two communication parties interact through quantum communication, so that information interaction in quantum security time synchronization is realized.
Preferably, the method supports two service functions of communication and time service, the communication and time service functions share the same channel resource, and channel resource scheduling is realized through wavelength division multiplexing or time division multiplexing.
Preferably, clock synchronization related to the communication process is completed by a time service, and time interaction required in the time service process is completed by the communication service.
The present invention provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the above method.
Compared with the prior art, the invention achieves the following technical effects:
firstly, the invention provides a communication time service integrated method, which integrates the requirement of the communication process on clock synchronization and the requirement of time synchronization on information interaction, and achieves the effects of 'one device and two functions';
secondly, the invention provides a communication time service integrated method based on a quantum entanglement distribution system, which has inherent safe transmission capacity of quantum communication and inherent high safety, high reliability and high precision of quantum time synchronization, and can realize comprehensive improvement of communication time service performance from a physical layer and an information layer;
in addition, the invention can provide a feasible working mode for the quantum information network, namely, basic resources for quantum state transmission are established through quantum entanglement distribution, and the grid-connected operation of various service functions is realized through modes of wavelength division multiplexing, time division multiplexing and the like, so that the effect of one physical network and more Zhang Luoji subnetworks is achieved.
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In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are needed to be used in the embodiments of the present invention will be briefly described, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of a quantum communication method of the present invention integrating communication timing;
FIG. 2 illustrates a schematic diagram of a particular embodiment of a quantum communication system incorporating communication timing of the present invention;
fig. 3 shows a schematic diagram of another embodiment of the quantum communication method of the communication time service integration of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
As shown in fig. 1, the present invention provides an embodiment of a quantum communication method integrating communication time service, including:
s101, quantum communication, namely distributing entangled photons to two communication parties through a quantum entanglement distribution system, and completing a quantum communication process through unitary transformation of the entangled photons;
s102, quantum safety time synchronization, namely distributing entangled photons to two communication parties through a quantum entanglement distribution system, and realizing time synchronization through counting time intervals of the entangled photons after bidirectional transmission;
s103, communication time service is integrated, namely, the quantum communication is used for transmitting interaction information required by time synchronization, and quantum communication is controlled through a clock calibrated by quantum security time synchronization, so that the integration of two services in an information layer and a physical layer is realized.
As shown in fig. 2, taking time division multiplexing as an example, this embodiment further provides a quantum communication system integrating communication time service, including two communication parties, including:
s1, both communication parties are provided with a quantum entanglement light source, a single photon detector, a time interval counter, a quantum communication modulation module, a quantum communication demodulation module and a local clock;
s2, generating entangled photons by a quantum entangled light source, wherein one path is reserved locally, and the other path is sent to a communication opposite end; entangled photons are divided into two types by a time division multiplexer or a wavelength division multiplexer, one type is used for quantum communication, and the other type is used for quantum safety time synchronization;
s3, when the system works in a quantum communication mode, locally reserved entangled photons are directly detected by a single photon detector, photons sent to a communication opposite end are encoded through a modulator and sent to the communication opposite end through an optical fiber circulator, and after the communication opposite end receives the signal, the signal is demodulated through a demodulation module and detected through the single photon detector; the communication process can be completed by the information interaction of the two communication parties through classical channels;
s4, when the system works in the quantum safety time synchronization mode, the locally reserved entangled photons are still directly detected by a single photon detector, photons sent to the communication opposite end are sent to the communication opposite end through an optical fiber circulator by taking a local clock signal as a reference, after the communication opposite end receives the signals, the signals are directly detected by the single photon detector, the clock difference of the communication opposite end and the communication opposite end can be calculated through coincidence measurement of a time interval counter, and the time synchronization process is completed;
s5, the time length of the quantum communication working service mode is consistent with the starting time length of the time division multiplexer, if the time division multiplexer is slightly different, the fact that certain clock difference exists between two communication parties at the moment is indicated, and the time length of the quantum communication working service mode can be utilized to the maximum extent through quantum safety time synchronization; on the other hand, the problem of information interaction in quantum security time synchronization can be solved by only interacting the two communication parties through quantum communication.
Taking wavelength division multiplexing as an example, the embodiment also provides a quantum communication system integrating communication time service, which comprises two communication parties, and comprises:
s1, both communication parties are provided with a quantum entanglement light source, a single photon detector, a time interval counter, a quantum communication modulation module, a quantum communication demodulation module and a local clock;
s2, generating entangled photons by a quantum entangled light source, wherein one path is reserved locally, and the other path is sent to a communication opposite end; entangled photons are divided into two types by a time division multiplexer or a wavelength division multiplexer, one type is used for quantum communication, and the other type is used for quantum safety time synchronization;
s3, when the system works in a quantum safety time synchronization mode, a certain specific wavelength entangled photon reserved locally is directly detected by a single photon detector through a wavelength division multiplexer, photons sent to a communication opposite end are encoded through a modulator, sent to the communication opposite end through the wavelength division multiplexer and an optical fiber circulator, and after the communication opposite end receives the signal, the signal is demodulated through a demodulation module and detected through the single photon detector; the communication process can be completed by the information interaction of the two communication parties through classical channels;
s4, when the system works in a quantum safety time synchronization mode, the other locally reserved entangled photon with specific wavelength is directly detected by a single photon detector through a wavelength division multiplexer, photons sent to a communication opposite end are sent to the communication opposite end through the wavelength division multiplexer and an optical fiber circulator by taking a local clock signal as a reference, after the communication opposite end receives the signal, the signals are directly detected through the single photon detector, and the clock difference of the communication opposite end and the communication opposite end can be calculated through coincidence measurement by a time interval counter, so that the time synchronization process is completed;
s5, each wavelength entangled photon used in the quantum communication working service mode has the same starting time, wherein the clock difference measured by entangled photons with a certain specific wavelength is basically equal to that measured by entangled photons with other specific wavelengths, and the quantum communication working service mode duration can be maximally utilized through quantum safety time synchronization; on the other hand, the problem of information interaction in quantum security time synchronization can be solved by only interacting the two communication parties through quantum communication.
As shown in fig. 3, this embodiment shows an embodiment of a quantum communication method with integrated communication time service, which specifically includes:
s201, quantum state distribution transmission resources are provided for two communication parties, quantum resources are distributed for the two communication parties through entanglement quantum light sources, and the entanglement degrees of freedom can be polarization, phase, time bit, mode field, frequency and the like;
s202, entangled photons of both communication parties are controlled through time division multiplexing or wavelength division multiplexing, so that different service functions are executed, the time division multiplexing refers to controlling the entangled photons according to the period, enabling the entangled photons to go through/not go through a communication coding process, the wavelength division multiplexing refers to generating multi-wavelength entangled photons, and only controlling the entangled photons with specific wavelengths to go through the communication coding process;
s203, completing different service functions through different operations on entangled photons, realizing clock error calculation through bidirectional coincidence measurement on entangled photons, and completing a communication encoding and decoding process through unitary transformation on entangled photons;
s204, realizing communication clock synchronization through quantum time synchronization, and finishing time synchronization system information interaction through quantum communication, thereby achieving the effect of communication time service integration.
In some embodiments, two service functions of communication and time service are supported, the communication and time service functions share the same channel resource, and channel resource scheduling is realized through wavelength division multiplexing or time division multiplexing.
In some embodiments, clock synchronization involved in the communication process is accomplished by a time service, and time interaction required in the time service is accomplished by the communication service.
The invention also provides an embodiment of a quantum communication method integrating communication and time service, wherein the two communication parties are provided with an atomic clock, a time interval counter, an entanglement light source and other modules, quantum safety time synchronization is realized through the steps of quantum entanglement distribution, single photon detection, coincidence measurement and the like, quantum communication is realized through the steps of quantum entanglement distribution, single photon detection, unitary transformation and the like, clock synchronization of the two communication parties is controlled based on the quantum safety time synchronization, and clock information of the two communication parties is interacted based on the quantum communication.
In some embodiments, the quantum state is used as a carrier for transmission, and the transmission process accords with the Hessenberg inaccuracy principle, the quantum state unclonable principle and the quantum inseparable principle.
In some embodiments, the quantum communication channel may be an optical fiber or a free space, the quantum state may be a photon or a spintronic, the coding degree of freedom may be a phase, a polarization, a mode field, an arrival time, etc., and the preparation-measurement protocol may be followed or the entanglement protocol may be followed, without limiting the specific structure and working mode of the quantum communication system.
In some embodiments, the quantum security time synchronization is carried out by taking a quantum state as a carrier, and clock difference measurement is carried out by taking a local clock as a reference, the transmission process accords with the principles of hessian inaccuracy, quantum state unclonable principle and quantum inseparable principle, the quantum security time synchronization channel can be an optical fiber or a free space, the quantum state can be a photon or a spintrone, the coding freedom degree can be phase, polarization, a mode field, arrival time and the like, but clock information must be carried, and the quantum security time synchronization protocol and the system structure are not limited.
In some embodiments, the communication time service integrated system supports two service functions of communication and time service, the communication and time service functions share the same channel resource, channel resource scheduling is realized through wavelength division multiplexing or time division multiplexing, clock synchronization related in the communication process is completed by the time service, time interaction required in the time service process is completed by the communication service, the coupling degree of the two services of communication time service is not limited, participation of other services after communication time service integration is not limited, and all methods for simultaneously operating the communication service and the time service and supporting each other are communication time service integrated.
Compared with the prior art, the invention has the following advantages:
firstly, the invention provides a communication time service integrated method, which integrates the requirement of the communication process on clock synchronization and the requirement of time synchronization on information interaction, and achieves the effects of 'one device and two functions';
secondly, the invention provides a communication time service integrated method based on a quantum entanglement distribution system, which has inherent safe transmission capacity of quantum communication and inherent high safety, high reliability and high precision of quantum time synchronization, and can realize comprehensive improvement of communication time service performance from a physical layer and an information layer;
in addition, the invention can provide a feasible working mode for the quantum information network, namely, basic resources for quantum state transmission are established through quantum entanglement distribution, and the grid-connected operation of various service functions is realized through modes of wavelength division multiplexing, time division multiplexing and the like, so that the effect of one physical network and more Zhang Luoji subnetworks is achieved.
For convenience of description, the above devices are described as being functionally divided into various units, respectively. Of course, the functions of each element may be implemented in one or more software and/or hardware elements when implemented in the present application.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.
Claims (10)
1. A quantum communication method integrating communication and time service provides quantum state distribution transmission resources for two communication parties, and distributes quantum resources for the two communication parties by entanglement of quantum light sources; the entangled photons of both communication parties are controlled by time division multiplexing or wavelength division multiplexing, so that different service functions are executed; different service functions are completed through different operations on entangled photons, clock difference calculation is realized through bidirectional coincidence measurement on entangled photons, and communication encoding and decoding processes are completed through unitary transformation on entangled photons; communication clock synchronization is realized through quantum time synchronization, and time synchronization system information interaction is completed through quantum communication, so that communication time service integration is realized.
2. The integrated communication and timing quantum communication method of claim 1, wherein the entanglement degree of freedom is one or more of polarization, phase, time bit, mode field, frequency.
3. The quantum communication method of communication time service integration according to claim 1, wherein the time division multiplexing means that entangled photons are controlled periodically to be subjected to/not subjected to a communication encoding process.
4. The quantum communication method of integrated communication and timing according to claim 1, wherein the wavelength division multiplexing is to generate multi-wavelength entangled photons, and only control specific wavelength entangled photons to undergo a communication encoding process.
5. The quantum communication method integrated with communication time service according to claim 1, wherein the method specifically comprises the following steps:
s1, quantum communication, namely distributing entangled photons to two communication parties through a quantum entanglement distribution system, and completing a quantum communication process through unitary transformation of the entangled photons;
s2, quantum safety time synchronization, namely distributing entangled photons to two communication parties through a quantum entanglement distribution system, and realizing time synchronization through counting time intervals of the entangled photons after bidirectional transmission;
s3, communication time service is integrated, interaction information required by time synchronization is transmitted through quantum communication, quantum communication is controlled through a clock calibrated by quantum security time synchronization, and integrated fusion of two services in an information layer and a physical layer is achieved.
6. The quantum communication method of communication and timing integration according to claim 1, wherein the two communication parties are provided with an atomic clock, a time interval counter and an entanglement light source module, quantum security time synchronization is realized through quantum entanglement distribution, single photon detection and coincidence measurement, quantum communication is realized through quantum entanglement distribution, single photon detection and unitary transformation, clock synchronization of the two communication parties is controlled based on quantum security time synchronization, and clock information of the two communication parties is interacted based on quantum communication.
7. The quantum communication method integrated with communication time service according to claim 1, wherein the method specifically comprises the following steps:
s101, a quantum entanglement light source, a single photon detector, a time interval counter, a quantum communication modulation module, a quantum communication demodulation module and a local clock are arranged on both communication parties;
s102, generating entangled photons through a quantum entanglement light source, wherein one path is reserved locally, and the other path is sent to a communication opposite end; entangled photons are divided into two types through a time division multiplexer, one type is used for quantum communication, and the other type is used for quantum safety time synchronization;
s103, when the system works in a quantum communication mode, locally reserved entangled photons are directly detected by a single photon detector, photons sent to a communication opposite end are encoded by a modulator and sent to the communication opposite end through an optical fiber circulator, and after the communication opposite end receives the signal, the signal is demodulated by a demodulation module and detected by the single photon detector; the communication process can be completed by the information interaction of the two communication parties through classical channels;
s104, when the system works in a quantum safety time synchronization mode, the locally reserved entangled photons are still directly detected by a single photon detector, photons sent to a communication opposite end are sent to the communication opposite end through an optical fiber circulator by taking a local clock signal as a reference, after the communication opposite end receives the signals, the signals are directly detected by the single photon detector, the clock difference of the two communication sides can be calculated through coincidence measurement of a time interval counter, and the time synchronization process is completed;
s105, if the quantum communication working service mode duration is inconsistent with the time division multiplexer starting duration, a certain clock difference exists between the two communication parties, and the quantum communication working service mode duration is utilized to the maximum extent through quantum safety time synchronization; the two communication parties interact through quantum communication, so that information interaction in quantum security time synchronization is realized.
8. The quantum communication method of communication time service integration according to claim 7, wherein the method supports two service functions of communication and time service, the communication and time service functions share the same channel resource, and channel resource scheduling is realized by wavelength division multiplexing or time division multiplexing.
9. The quantum communication method of communication time service integration according to claim 8, wherein clock synchronization related to the communication process is completed by a time service, and time interaction required in the time service process is completed by the communication service.
10. A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the method of any of claims 1-9.
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