CN116170083B - Phase difference zeroing control method based on high-precision quantum measurement network - Google Patents
Phase difference zeroing control method based on high-precision quantum measurement network Download PDFInfo
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Abstract
According to the phase difference return-to-zero control method based on the high-precision quantum measurement network, quantum interference among a plurality of points is realized by using the quantum interferometer, phase drift among the points is determined in real time according to a quantum interference result, phase differences of all the points are locked to zero by compensating the phase drift in real time, and the distributed information system using the phase as a reference realizes signal coordination of the plurality of points. The invention not only can be used as a distributed sensing means to realize perimeter safety protection of key facilities such as dams, bridges, airports and the like, but also can be used as a cooperative control means to provide a phase locking mechanism for a distributed information system such as joint spectrum imaging and the like, and the high-precision characteristic of quantum phase measurement is yielded into the distributed information system, so that the capability of the energized distributed information system is improved by improving the phase control precision, and the invention is expected to play an important role in the fields such as hydrologic monitoring, electric power monitoring, weather early warning and the like.
Description
Technical Field
The invention belongs to the interdisciplines of quantum measurement, quantum communication and signal processing, in particular to a method for transmitting high-precision quantum phase signals by utilizing a quantum network, measuring phase fluctuation of a plurality of points, compensating in real time and realizing phase difference zeroing control of a distributed measurement system, and particularly relates to a phase difference zeroing control method based on the high-precision quantum measurement network.
Background
The core of coherent accumulation is to improve the signal to noise ratio by pulse accumulation according to the phase relation of adjacent pulse signals. The coherent accumulation technology can greatly improve the performance of a measurement network, and the signal-to-noise ratio index has a direct relation with the phase transmission precision. Compared with the classical phase transmission means, the quantum phase transmission means can break through the bottleneck of classical indexes and approach the limit of sea-borne Bay, and the precision of coherent accumulation can reach an unprecedented height. More importantly, the quantum phase transmission means can be compatible with the existing quantum information equipment, so that the quantum information can be efficiently transmitted, the quantum information equipment distributed at a single point can be clustered to form a network, the system can function, and limit sensing of physical quantities such as electromagnetic field measurement, space-time reference and the like can be realized.
The quantum phase measuring network can be constructed based on a quantum phase transmission means, and is used for two main purposes when in information transmission in the quantum phase measuring network, namely, the quantum phase measuring network is used for distributed sensing, namely, the change of sensing physical quantity is determined by analyzing phase drift generated by each point of the quantum phase measuring network under the influence of environmental variables, and the quantum phase measuring network is used for distributed phase synchronization, namely, the offset of each point of the quantum phase measuring network is monitored in real time and compensated, so that phase difference clocks among corresponding devices of each point are locked and zeroed, and the quantum phase measuring network has important application value in the aspect of cooperative control of a distributed information system.
Disclosure of Invention
Aiming at the defects, the invention aims to solve the technical problems of how to realize high-precision measurement of multi-point-position phase by using a remote quantum interferometer, realize phase difference return-to-zero control by controlling the phase distribution of each point position through closed loop feedback, realize a distributed sensing function by the multi-point-position phase difference distribution, realize phase synchronization of a distributed information system by the multi-point-position phase difference return-to-zero control and support signal processing functions such as phase-coherent accumulation and the like.
The invention aims to provide a phase difference return-to-zero control method based on a high-precision quantum measurement network, which is characterized in that the phase difference of each point of a distributed information system is determined through coincidence measurement of a remote quantum interferometer, a sensor is embedded into an interference arm of the quantum phase measurement network, the change of physical quantity to be measured of each point is determined through a measurement result, high-precision distributed sensing is realized, phase difference return-to-zero is realized through closed loop feedback control of the phase distribution of each point, and the phase difference of each point is locked to zero through real-time feedback control, so that phase synchronization of the distributed information system is realized.
Preferably, the remote quantum interferometer is built by a single photon light source, an optical interferometer, a single photon detector and a coincidence counter.
Preferably, the remote quantum interferometer comprises a remote arm and a local arm, a phase difference is determined according to the coincidence counting result of quantum interference, and the local arms of the quantum interferometers are controlled to realize phase synchronization.
Preferably, when a high-precision quantum phase measurement network is used to implement distributed sensing, a sensor may be coupled to the distal arm, the sensor responding to the physical quantity and the distal arm phase correspondingly producing fluctuations.
Preferably, when the high-precision quantum phase measurement network is used for realizing high-precision cooperative control, the distributed information system and the remote arm can be connected together, and a control signal formed by analyzing phase fluctuation through the local detection section is sent to the distributed information system.
Preferably, the method specifically comprises the following steps:
s1, arranging an interference arm required by phase measurement at the position of a distributed information system, and carrying out local phase synchronization on the optical path of the interference arm and various sensors or information systems;
s2, transmitting the single-photon light source to each working point of a distributed information system through a quantum interferometer and a long-distance optical fiber, and reflecting the single-photon light source back to the position of the single-photon light source through an interference arm to uniformly detect the single-photon light source by a single-photon detector;
s3, the quantum interferometers determine the phase difference of two interference arms through single photon coincidence measurement, the local interference arm of each quantum interferometer is connected at one time, and interferometry and phase control are carried out so that the phases of all the local interference arms are synchronous;
s4, when the quantum phase measurement network is used for distributed sensing, each interference arm is influenced by environmental variables to generate optical path change, the change is analyzed by a detection end of the quantum phase measurement network, and the point position of the physical quantity which generates the change and the change condition thereof are clearly generated;
and S5, when the quantum phase measurement network is used for the cooperative control of the distributed information system, the detection end of the quantum phase measurement network senses the phase difference of each point and sends a compensation signal to the information system of each point, the information system keeps consistent with the phase of the local interference arm, and the optical path difference of the interference arm is repeatedly compensated until all the point phases sensed by the detection section are completely synchronous, so that the cooperative control of the distributed information system on the phase synchronization level is completed.
Preferably, in the step S3, the phase difference of each point of the distributed information system may be determined according to the phase difference of the two arms of each interferometer.
Preferably, the optical path length of the S1 interference arm may be actively controlled or may be passively changed.
Preferably, the interference object of the quantum interferometer is single photon or spin electron, phase information is determined through interference fringe fluctuation, interference precision breaks through classical shot noise limit and approaches to the sea-borne Barbell limit, and phase fluctuation is determined in real time through single photon detection and coincidence counting.
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 has the following advantages:
firstly, a plurality of quantum interferometers are combined into a quantum phase measurement network, and phase distribution of all points is obtained through phase synchronous locking and coincidence measurement of a local arm of the quantum interferometers, so that the quantum phase measurement network is an important attempt from the points to the network;
secondly, the quantum measurement method has higher precision than the classical measurement method, can approach to the measurement limit of the Hessenberg, and the characteristic enables the distributed sensing and cooperative control supported by the method to have higher precision;
finally, the quantum measurement network can be used as a transmission means for connecting various quantum information devices, and provides important guarantee for a distributed quantum information system.
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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 shows a schematic diagram of an embodiment of the phase-difference zeroing control method based on a high-precision quantum measurement network of the present invention;
FIG. 2 shows a schematic diagram of a specific embodiment of the phase-difference zeroing control method of the present invention based on a high-precision quantum measurement network;
fig. 3 shows a schematic diagram of another embodiment of the phase-difference zeroing control method based on a high-precision quantum measurement network 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 phase difference zeroing control method based on a high-precision quantum measurement network, including:
s101, remotely collecting distributed quantum phase information, and determining phase differences of each point of a distributed information system through coincidence measurement of a remote quantum interferometer;
s102, based on the sensing function of the quantum phase measurement network, embedding a sensor into an interference arm of the quantum phase measurement network, and determining the change of the physical quantity to be measured of each point location through a measurement result to realize a high-precision distributed sensing function;
s103, based on the phase synchronization function of the quantum phase measurement network, phase difference return to zero is realized by controlling phase distribution of each point through closed loop feedback, phase difference of each point is locked to zero through real-time feedback control, and guarantee is provided for phase synchronization of a distributed information system.
In some embodiments, the remote quantum interferometer is built from a single photon light source, an optical interferometer, a single photon detector, and a coincidence counter.
In some embodiments, the remote quantum interferometers divide the remote arm and the local arm, phase difference is determined according to the coincidence counting result of quantum interference, and the local arms of the quantum interferometers are controlled to realize phase synchronization.
In some embodiments, when a high-precision quantum phase measurement network is used to implement distributed sensing, a sensor may be coupled to the distal arm, the sensor responding to the physical quantity with a corresponding fluctuation in the phase of the distal arm.
In some embodiments, when a high-precision quantum phase measurement network is used to achieve high-precision cooperative control, a distributed information system may be coupled to the remote arm and the phase fluctuations are analyzed by the local probe section to form a control signal that is sent to the distributed information system.
As shown in fig. 2, the embodiment further provides a phase difference return-to-zero control method based on a high-precision quantum measurement network, which comprises the following implementation steps:
1. an interference arm required by phase measurement is arranged at the position of the distributed information system, the optical path of the interference arm can be actively controlled or passively changed, and the optical path of the interference arm can be locally phase-synchronized with various sensors or information systems;
2. the single photon light source generates single photons, the single photons are transmitted to each working point of the distributed information system through the quantum interferometer and the long-distance optical fiber, and the single photons are reflected back to the position of the single photon light source after passing through the interference arm and are uniformly detected by the single photon detector;
3. the quantum interferometers can determine the phase difference of two interference arms through single photon coincidence measurement, the local interference arm of each quantum interferometer is connected at one time, interference measurement and phase control are carried out, so that the phases of all the local interference arms are synchronous, and the phase difference of each point position of the distributed information system can be judged according to the phase difference of the two arms of each interferometer;
4. when the quantum phase measuring network is used for distributed sensing, each interference arm is influenced by environmental variables to generate optical path change, and the change is analyzed by a detection end of the quantum phase measuring network to clearly generate the point position of the physical quantity and the change condition of the physical quantity. Given that quantum interferometry has a higher accuracy than classical interferometry, the above-described distributed sensing can also have a higher accuracy than classical distributed sensing;
5. when the quantum phase measuring network is used for the cooperative control of the distributed information system, the detection end of the quantum phase measuring network senses the phase difference of each point and sends a compensation signal to the information system of each point, the information system keeps consistent with the phase of the local interference arm, the optical path difference of the interference arm is repeatedly compensated until all the point phases sensed by the detection section are completely synchronous, and the cooperative control of the distributed information system on the phase synchronization level is completed. Given that quantum interferometry has a higher accuracy than classical interferometry, the distributed cooperative control described above can also have a higher phase synchronization accuracy than classical cooperative control.
As shown in fig. 3, the present embodiment shows an embodiment of a phase difference zeroing control method based on a high-precision quantum measurement network, which specifically includes:
s201, constructing a high-precision quantum phase measurement network, constructing a long-distance quantum interferometer through a single photon light source, an optical interferometer, a single photon detector, a coincidence counter and other equipment, dividing a remote arm and a local arm of the interferometer, determining a phase difference through a coincidence counting result of quantum interference, and controlling the local arms of a plurality of quantum interferometers to realize phase synchronization;
s202, when a high-precision quantum phase measurement network is used for realizing distributed sensing, a sensor and a far-end arm can be connected together, the sensor responds to physical quantity, the phase of the far-end arm correspondingly fluctuates, and sensing information of distributed point positions is obtained by analyzing the phase fluctuation at a local detection end;
and S203, when the high-precision quantum phase measurement network is used for realizing high-precision cooperative control, the distributed information system and the remote arm can be connected together, a control signal is formed by analyzing phase fluctuation through the local detection section and is sent to the distributed information system, and the phase reference of the distributed information system is controlled until all point positions and phases are synchronous, so that the high-precision cooperative control of the distributed information system can be completed.
In some embodiments, in S201, the phase difference between two arms of each interferometer can be reflected as the phase fluctuation of all distributed points.
In some embodiments, the interference object of the quantum interferometer is a single photon or a spin electron, phase information is determined through interference fringe fluctuation, interference accuracy breaks through classical shot noise limit and approaches the seasburgh limit, and phase fluctuation is determined in real time through single photon detection and coincidence counting.
The invention also provides an embodiment of a phase difference return-to-zero control method based on a high-precision quantum measurement network, quantum interference among a plurality of points is realized by utilizing a quantum interferometer, phase drift among the points is determined in real time according to a quantum interference result, phase differences of all the points are locked to zero by compensating the phase drift in real time, and the signal coordination of multiple points is realized by using the distributed information system with the phase as a reference.
In some embodiments, the method not only can be used as a distributed sensing means to realize perimeter safety protection of key facilities such as dams, bridges and airports, but also can be used as a cooperative control means to provide a phase locking mechanism for a distributed information system such as combined spectral imaging, etc., so that the high-precision characteristic of quantum phase measurement is yielded into the distributed information system, the capability of the energized distributed information system is improved by improving the phase control precision, and the method is expected to play an important role in various fields such as hydrologic monitoring, electric power monitoring, weather early warning, etc.
In some embodiments, the interference object of the quantum interferometer is single photon or spin electron, the phase information is determined through interference fringe fluctuation, the interference precision can break through classical shot noise limit and approach to the sea-borne limit, the phase fluctuation can be determined in real time through means such as single photon detection and coincidence counting, the structure of the quantum interferometer can be of a equine gain type or a Michelson type, specific structural parameters of the interferometer are not limited, and a specific mode of resolving the phase of the quantum interferometer is not limited;
in some embodiments, the phase zeroing is to lock the local phase differences of the quantum interferometers to zero, determine the phase differences of the far-end points through single photon detection and coincidence technology, remotely control the far-end phases by sending feedback signals until the local phase differences and the foreign phase differences of the quantum interferometers are locked to zero, and realize the zeroing process through closed loop control.
In some embodiments, the feedback signal may be a communication message or an analog signal, which does not limit the feedback compensation mode, does not limit the specific form of the distributed information system using phase zeroing, does not limit the specific parameters such as the closed loop period, and the method of using the quantum phase measurement network to obtain the phase difference of different points and accurately controlling the phase until the phase difference is zero by taking the phase difference as a standard is within the scope of the claims of the present invention.
In some embodiments, when the high-precision quantum phase measurement network is used to implement distributed sensing in distributed sensing, the sensor and the far-end arm may be connected together, the sensor responds to the physical quantity, the phase of the far-end arm correspondingly fluctuates, and sensing information of the distributed point location is obtained by analyzing the phase fluctuation at the local detection end, so that the connection relationship and connection manner between the far-end arm and the sensor are not limited, and the method for implementing fluctuation change of the physical quantity of each distributed point location through the quantum phase measurement network is within the scope of the claims of the present invention.
Compared with the prior art, the invention has the following advantages:
firstly, a plurality of quantum interferometers are combined into a quantum phase measurement network, and phase distribution of all points is obtained through phase synchronous locking and coincidence measurement of a local arm of the quantum interferometers, so that the quantum phase measurement network is an important attempt from the points to the network;
secondly, the quantum measurement method has higher precision than the classical measurement method, can approach to the measurement limit of the Hessenberg, and the characteristic enables the distributed sensing and cooperative control supported by the method to have higher precision;
finally, the quantum measurement network can be used as a transmission means for connecting various quantum information devices, and provides important guarantee for a distributed quantum information system.
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 (9)
1. The phase difference zeroing control method based on the high-precision quantum measurement network is characterized in that the phase difference of each point of a distributed information system is determined through coincidence measurement of a remote quantum interferometer, a sensor is embedded into an interference arm of the quantum phase measurement network, the change of physical quantity to be measured of each point is determined through measurement results, high-precision distributed sensing is realized, phase difference zeroing is realized through closed loop feedback control of the phase distribution of each point, and the phase difference of each point is locked to be zero through real-time feedback control, so that phase synchronization of the distributed information system is realized; the method specifically comprises the following steps:
s1, arranging an interference arm required by phase measurement at the position of a distributed information system, and carrying out local phase synchronization on the optical path of the interference arm and various sensors or information systems;
s2, transmitting the single-photon light source to each working point of a distributed information system through a quantum interferometer and a long-distance optical fiber, and reflecting the single-photon light source back to the position of the single-photon light source through an interference arm to uniformly detect the single-photon light source by a single-photon detector;
s3, the quantum interferometers determine the phase difference of two interference arms through single photon coincidence measurement, and the local interference arms of each quantum interferometer are connected together and carry out interferometry and phase control, so that the phases of all the local interference arms are synchronous;
s4, when the quantum phase measurement network is used for distributed sensing, each interference arm is influenced by environmental variables to generate optical path change, the change is analyzed by a detection end of the quantum phase measurement network, and the point position of the physical quantity which generates the change and the change condition thereof are clearly generated;
and S5, when the quantum phase measurement network is used for the cooperative control of the distributed information system, the detection end of the quantum phase measurement network senses the phase difference of each point and sends a compensation signal to the information system of each point, the information system keeps consistent with the phase of the local interference arm, and the optical path difference of the interference arm is repeatedly compensated until all the point phases sensed by the detection section are completely synchronous, so that the cooperative control of the distributed information system on the phase synchronization level is completed.
2. The phase difference zeroing control method based on the high-precision quantum measurement network according to claim 1, wherein the remote quantum interferometer is built by a single photon light source, an optical interferometer, a single photon detector and a coincidence counter.
3. The phase difference return-to-zero control method based on the high-precision quantum measurement network according to claim 1, wherein the remote quantum interferometers are divided into a remote arm and a local arm, the phase difference is determined through the coincidence counting result of quantum interference, and the local arms of the quantum interferometers are controlled to realize phase synchronization.
4. A phase difference zeroing control method based on a high-precision quantum phase measurement network according to claim 3, wherein when the high-precision quantum phase measurement network is used to implement distributed sensing, a sensor and a far-end arm can be connected together, and the sensor responds to a physical quantity, and the phase of the far-end arm correspondingly fluctuates.
5. The phase difference zeroing control method based on the high-precision quantum phase measurement network according to claim 4, wherein when the high-precision quantum phase measurement network is used for realizing high-precision cooperative control, the distributed information system and the far-end arm can be connected together, and a phase fluctuation forming control signal is analyzed through the local detection section and sent to the distributed information system.
6. The phase difference zeroing control method based on the high-precision quantum measurement network according to claim 1, wherein the phase difference of each point of the distributed information system can be judged according to the phase difference of two arms of each interferometer in the step S3.
7. The phase difference zeroing control method based on the high-precision quantum measurement network according to claim 1, wherein the optical path length of the S1 interference arm can be actively controlled or passively changed.
8. The phase difference return-to-zero control method based on the high-precision quantum measurement network according to claim 1, wherein the interference object of the quantum interferometer is single photon or spin electron, phase information is determined through interference fringe fluctuation, interference precision breaks through classical shot noise limit and approaches an offshore amberg limit, and phase fluctuation is determined in real time through single photon detection and coincidence counting.
9. A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the method of any of claims 1-8.
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| CN113011591A (en) * | 2020-11-09 | 2021-06-22 | 深圳市腾讯计算机系统有限公司 | Quantum measurement and control system for multi-bit quantum feedback control |
| CN114323243A (en) * | 2021-11-26 | 2022-04-12 | 军事科学院系统工程研究院网络信息研究所 | High-sensitivity perimeter safety monitoring method based on distributed quantum interferometer |
| CN114499693A (en) * | 2021-11-29 | 2022-05-13 | 军事科学院系统工程研究院网络信息研究所 | Multi-physical-field quantum measurement networking method based on coherent accumulation |
| CN115225247A (en) * | 2022-07-11 | 2022-10-21 | 北京邮电大学 | Phase modulation loopback time synchronization device, method and system |
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