CN114323243B - High-sensitivity perimeter safety monitoring method based on distributed quantum interferometer - Google Patents
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Abstract
The invention discloses a high-sensitivity perimeter safety monitoring method based on a distributed quantum interferometer, which is characterized in that a multi-wavelength quantum light source generates multiple paths of single photons and inputs different quantum interferometers, the quantum interferometers are deployed to different positions of a perimeter safety area in a grid mode, phase fluctuation is measured by association, intrusion events are screened, and the distributed quantum interferometers are connected based on a quantum communication network, so that the high-sensitivity perimeter safety function is realized. The invention combines the distributable layout advantage of the optical fiber sensing perimeter safety system and the high-sensitivity phase measurement characteristic of the quantum interferometer, and the perimeter safety method has higher measurement sensitivity. Meanwhile, the invention explores the feasibility of the distributed quantum sensing system and provides a solution for exploration of quantum communication application modes except key distribution.
Description
Technical Field
The invention belongs to the interdisciplines of optical fiber sensing, quantum communication and quantum measurement, in particular to a high-sensitivity perimeter safety method for distributing a plurality of optical fiber quantum interferometers in a grid mode and determining intrusion event related vibration signals according to quantum interferometry results, and particularly relates to a high-sensitivity perimeter safety monitoring method, a high-sensitivity perimeter safety monitoring system and a storage medium based on the distributed quantum interferometers.
Background
The perimeter safety system is an intrusion protection system for safety critical places such as banks, safes and the like, and the main principle is that pressure or vibration signals in the environment are identified through various pressure or vibration sensors, and the pressure or vibration signals are matched and screened with characteristic signals corresponding to intrusion events. The perimeter safety system based on the optical principle has the characteristic of high sensitivity, is a main implementation mode of the perimeter safety system at present, and typical systems comprise an infrared detection recognition system (for recognizing infrared signals sent by an intruder and alarming), a foldback light path detection recognition system (for alarming when the intruder shields a light path) and an optical fiber sensing perimeter safety system (for changing the effective refractive index of an optical fiber caused by vibration or pressure signals generated by the intruder). For perimeter safety application with wider deployment range, the optical fiber sensing perimeter safety system has unique advantages, can comprehensively sense vibration signals in a larger range by arranging long-distance optical fibers, and has important application value in special fields such as national line protection, oil pipeline protection and the like. In addition, the optical fiber sensing perimeter safety system can play an important role in bridge stress monitoring, dam deformation monitoring, fire comprehensive protection and other application occasions needing to develop physical quantity sensing in a large range.
In a strict sense, all systems involving long-distance transmission of quantum states can be quantum communication systems, and quantum interferometers can perform sensing functions similar to classical optical interferometers, but (based on coincidence technology) can have higher phase measurement accuracy.
Disclosure of Invention
Based on the problems of the prior art, the invention aims to solve the technical problems: how to input single photons generated by a multi-wavelength quantum light source into a multi-path quantum interferometer by using a wavelength division multiplexing system or a time division multiplexing system, deploy the quantum interferometer on different positions of a perimeter safety area, change the relative phase difference of the quantum interferometer by vibration signals caused by intrusion events, realize high-sensitivity measurement of the phase difference by conforming to counting measurement, and explore a new mode of application of a distributed quantum sensing network.
Aiming at the defects existing in the prior art, the invention aims to provide a high-sensitivity perimeter safety monitoring method based on a distributed quantum interferometer, which is characterized in that multi-wavelength single photons are generated by a multi-wavelength quantum light source and are respectively input into respective quantum interferometers through a wavelength division multiplexing system, the quantum interferometers are unequal arm interferometers, long arms of the unequal arm interferometers are deployed in a perimeter safety area in a grid mode, and sensing signals are received; the method comprises the steps of measuring quantum interference by coincidence with counting at the position of a multi-wavelength quantum light source, realizing high-sensitivity sensing of an intrusion event with relatively high phase measurement precision, generating multiple paths of single photons by the multi-wavelength quantum light source and inputting different quantum interferometers, deploying the quantum interferometers to different positions of a perimeter safety area in a grid mode, measuring phase fluctuation by correlation and identifying the intrusion event, connecting the distributed quantum interferometers based on a quantum communication network, and realizing high-sensitivity perimeter safety monitoring.
Preferably, the quantum communication network uses a quantum state 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.
Preferably, the intrusion event will cause a change in the physical field, thereby producing a phase response within the quantum interferometer.
Preferably, the quantum interferometer realizes physical field measurement based on quantum basic characteristics, the measurement precision breaks through the shot noise limit and approaches the offshore amberg limit, the physical field change caused by various intrusion events is detected, and the detection result is reflected on quantum state phase information.
Preferably, the method specifically comprises the following steps:
S101, constructing a multi-path quantum interferometer, generating multi-wavelength single photons through a multi-wavelength quantum light source, and respectively inputting the multi-wavelength single photons into the respective unequal arm interferometers through a wavelength division multiplexing system;
S102, deploying a distributed quantum interferometer, deploying long arms of the unequal arm interferometer in a perimeter safety area in a grid mode, and receiving a sensing signal;
s103, quantum interference is realized, and high-sensitivity sensing of an intrusion event is realized with relatively high phase measurement precision by conforming to counting measurement quantum interference at the position of the multi-wavelength quantum light source.
Preferably, the method specifically comprises the following steps:
s201, generating multi-wavelength single photons by a multi-wavelength quantum light source, and inputting the single photons into a quantum interferometer;
S202, the structure of the quantum interferometer is an unequal arm Mach-Zehnder interference structure, wherein one arm reaches a perimeter safety protection area after passing through long-distance optical fibers, and long arms of the multipath interferometer are deployed in a grid mode after being arranged;
s203, two output arms of the quantum interferometer are connected with the single photon detector, and the single photon detector is analyzed through the correlation analyzer;
S204, generating single photons by the multi-wavelength quantum light source according to a certain pulse period, wherein the pulse period is basically equal to the time difference between two arms of the unequal arm interferometer;
S205, when an intrusion event occurs in the perimeter safety area, the interference arm of the quantum interferometer generates phase deviation under the influence of a pressure signal, and the phase deviation influences quantum interference, so that the coincidence counting rate measured by the association analyzer changes, and the phase deviation and the coincidence counting rate change are in a linear relation in a certain dynamic range;
S206, demodulating the phase time-varying signals in the quantum interferometers by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the occurrence position of the intrusion event to finish the perimeter safety function.
Preferably, the method specifically comprises the following steps:
S301, generating multiple paths of same-color single photons by a quantum light source, and inputting the single photons into a quantum interferometer;
S302, the structure of the quantum interferometer is an unequal arm Mach-Zehnder interference structure, wherein one arm reaches a perimeter safety protection area after passing through long-distance optical fibers, and long arms of the multipath interferometer are deployed in a grid mode after being arranged;
s303, two output arms of the quantum interferometer are connected with a single photon detector, and are analyzed through a correlation analyzer;
s304, generating single photons by the multi-wavelength quantum light source according to a certain pulse period, wherein the pulse period is basically equal to the time difference between two arms of the unequal arm interferometer;
s305, when an intrusion event occurs in the perimeter safety area, the interference arm of the quantum interferometer generates phase deviation under the influence of a pressure signal, and the phase deviation influences quantum interference, so that the coincidence counting rate measured by the association analyzer changes, and the phase deviation and the coincidence counting rate change are in a linear relation in a certain dynamic range;
s306, demodulating the phase time-varying signals in the quantum interferometers by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the occurrence position of the intrusion event to finish the perimeter safety function.
Preferably, for a specific quantum interferometer, single photons generated by two adjacent pulses at a time sequence position can reach an interferometer output arm at the same time, and the single photons are output from a certain interferometer output arm in pairs with high probability under the influence of the Hong-Ou-Mandel interference effect, and the probability theoretical value of coincidence counting measured by the correlation analyzer is 0.
A system for realizing the high-sensitivity perimeter safety monitoring method based on the distributed quantum interferometer comprises the quantum interferometer, a multi-wavelength quantum light source and a correlation analyzer, wherein the multi-wavelength quantum light source generates multi-wavelength single photons and inputs the single photons into the quantum interferometer; the structure of the quantum interferometer is an unequal arm Mach-Zehnder interference structure, wherein one arm reaches a perimeter safety protection area after passing through long-distance optical fibers, and long arms of the multipath interferometer are deployed in a grid mode after being arranged; the two output arms of the quantum interferometer are connected with the single photon detector and analyzed by the association analyzer; the multi-wavelength quantum light source generates single photons according to a certain pulse period, and the pulse period is basically equal to the time difference between two arms of the unequal arm interferometer; when an intrusion event occurs in the perimeter safety area, the interference arm of the quantum interferometer generates phase deviation under the influence of a pressure signal, and the phase deviation influences quantum interference, so that the coincidence counting rate measured by the association analyzer changes, and the phase deviation and the coincidence counting rate change are in a linear relation in a certain dynamic range; the intrusion measurement is completed by analyzing the phase time-varying signals in the coincidence counting rate demodulation quantum interferometers, and the intrusion event occurrence position is roughly estimated by comparing the measurement results of the two quantum interferometers, so that the perimeter safety function is completed.
A computer readable storage medium having stored thereon a computer program which when executed by a processor implements the above method.
A computer program product comprising computer programs/instructions which when executed by a processor implement the steps of the above method.
Compared with the prior art, the invention has the following advantages:
1. According to the invention, a quantum communication technology and a quantum interference technology are combined, and the measurement precision of a perimeter safety system based on optical fiber sensing is remarkably improved by means of the high-precision characteristic of quantum interference in the aspect of phase measurement;
2. the technical scheme provided by the invention has certain positioning traceability, can be applied to perimeter safety protection, and can be widely applied to fields of engineering component fatigue test, oil pipeline theft and cutting monitoring and the like;
3. the invention changes the single application mode of the traditional quantum communication network for realizing the safe transmission of information, and has profound effects on the development of quantum information technology.
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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 the working principle of the high sensitivity perimeter safety monitoring based on the distributed quantum interferometer 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.
The invention provides an embodiment of a high-sensitivity perimeter safety monitoring method based on a distributed quantum interferometer, which comprises the steps of generating multi-wavelength single photons through a multi-wavelength quantum light source, respectively inputting the multi-wavelength single photons into respective quantum interferometers through a wavelength division multiplexing system, wherein the quantum interferometers are unequal arm interferometers, arranging long arms of the unequal arm interferometers in a perimeter safety area in a grid mode, and receiving sensing signals; the method comprises the steps of measuring quantum interference by coincidence with counting at the position of a multi-wavelength quantum light source, realizing high-sensitivity sensing of an intrusion event with relatively high phase measurement precision, generating multiple paths of single photons by the multi-wavelength quantum light source and inputting different quantum interferometers, deploying the quantum interferometers to different positions of a perimeter safety area in a grid mode, measuring phase fluctuation by correlation and identifying the intrusion event, connecting the distributed quantum interferometers based on a quantum communication network, and realizing high-sensitivity perimeter safety monitoring.
In some embodiments, the quantum communication network uses quantum states as carriers 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 intrusion event will cause a change in the physical field, thereby producing a phase response within the quantum interferometer.
In some embodiments, the quantum interferometer realizes physical field measurement based on quantum basic characteristics, the measurement precision breaks through the shot noise limit and approaches the offshore amberg limit, physical field changes caused by various intrusion events are detected, and the detection result is reflected on quantum state phase information.
The invention provides a high-sensitivity perimeter safety monitoring method embodiment based on a distributed quantum interferometer, which comprises the following steps:
S101, constructing a multi-path quantum interferometer, generating multi-wavelength single photons through a multi-wavelength quantum light source, and respectively inputting the multi-wavelength single photons into the respective unequal arm interferometers through a wavelength division multiplexing system;
S102, deploying a distributed quantum interferometer, deploying long arms of the unequal arm interferometer in a perimeter safety area in a grid mode, and receiving a sensing signal;
s103, quantum interference is realized, and high-sensitivity sensing of an intrusion event is realized with relatively high phase measurement precision by conforming to counting measurement quantum interference at the position of the multi-wavelength quantum light source.
The invention provides a high-sensitivity perimeter safety monitoring method embodiment based on a distributed quantum interferometer, which comprises the following steps:
s201, generating multi-wavelength single photons by a multi-wavelength quantum light source, and inputting the single photons into a quantum interferometer;
S202, the structure of the quantum interferometer is an unequal arm Mach-Zehnder interference structure, wherein one arm reaches a perimeter safety protection area after passing through long-distance optical fibers, and long arms of the multipath interferometer are deployed in a grid mode after being arranged;
s203, two output arms of the quantum interferometer are connected with the single photon detector, and the single photon detector is analyzed through the correlation analyzer;
S204, generating single photons by the multi-wavelength quantum light source according to a certain pulse period, wherein the pulse period is basically equal to the time difference between two arms of the unequal arm interferometer;
S205, when an intrusion event occurs in the perimeter safety area, the interference arm of the quantum interferometer generates phase deviation under the influence of a pressure signal, and the phase deviation influences quantum interference, so that the coincidence counting rate measured by the association analyzer changes, and the phase deviation and the coincidence counting rate change are in a linear relation in a certain dynamic range;
S206, demodulating the phase time-varying signals in the quantum interferometers by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the occurrence position of the intrusion event to finish the perimeter safety function.
The invention provides a high-sensitivity perimeter safety monitoring method embodiment based on a distributed quantum interferometer, which comprises the following steps:
S301, generating multiple paths of same-color single photons by a quantum light source, and inputting the single photons into a quantum interferometer;
S302, the structure of the quantum interferometer is an unequal arm Mach-Zehnder interference structure, wherein one arm reaches a perimeter safety protection area after passing through long-distance optical fibers, and long arms of the multipath interferometer are deployed in a grid mode after being arranged;
s303, two output arms of the quantum interferometer are connected with a single photon detector, and are analyzed through a correlation analyzer;
s304, generating single photons by the multi-wavelength quantum light source according to a certain pulse period, wherein the pulse period is basically equal to the time difference between two arms of the unequal arm interferometer;
s305, when an intrusion event occurs in the perimeter safety area, the interference arm of the quantum interferometer generates phase deviation under the influence of a pressure signal, and the phase deviation influences quantum interference, so that the coincidence counting rate measured by the association analyzer changes, and the phase deviation and the coincidence counting rate change are in a linear relation in a certain dynamic range;
s306, demodulating the phase time-varying signals in the quantum interferometers by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the occurrence position of the intrusion event to finish the perimeter safety function.
In some embodiments, for a particular quantum interferometer, single photons generated by two adjacent pulses at a time sequence position may arrive at the interferometer output arm at the same time, and a large probability is output from one interferometer output arm in pairs under the influence of the Hong-Ou-Mandel interference effect, and the probability theoretical value of the coincidence count measured by the correlation analyzer is 0.
The invention provides a system embodiment for realizing a high-sensitivity perimeter safety monitoring method based on a distributed quantum interferometer, which comprises a quantum interferometer, a multi-wavelength quantum light source and a correlation analyzer, wherein the multi-wavelength quantum light source generates multi-wavelength single photons and inputs the multi-wavelength single photons into the quantum interferometer; the structure of the quantum interferometer is an unequal arm Mach-Zehnder interference structure, wherein one arm reaches a perimeter safety protection area after passing through long-distance optical fibers, and long arms of the multipath interferometer are deployed in a grid mode after being arranged; the two output arms of the quantum interferometer are connected with the single photon detector and analyzed by the association analyzer; the multi-wavelength quantum light source generates single photons according to a certain pulse period, and the pulse period is basically equal to the time difference between two arms of the unequal arm interferometer; when an intrusion event occurs in the perimeter safety area, the interference arm of the quantum interferometer generates phase deviation under the influence of a pressure signal, and the phase deviation influences quantum interference, so that the coincidence counting rate measured by the association analyzer changes, and the phase deviation and the coincidence counting rate change are in a linear relation in a certain dynamic range; the intrusion measurement is completed by analyzing the phase time-varying signals in the coincidence counting rate demodulation quantum interferometers, and the intrusion event occurrence position is roughly estimated by comparing the measurement results of the two quantum interferometers, so that the perimeter safety function is completed.
As shown in fig. 1, an embodiment of a high sensitivity perimeter safety system based on a distributed quantum interferometer is shown, wherein the gray area is a perimeter safety area, and the implementation steps are as follows:
(1) The multi-wavelength quantum light source generates multi-wavelength single photons, or the quantum light source generates multiple paths of same-color single photons, and the photons are input into the quantum interferometer;
(2) The quantum interferometer is structurally an unequal arm Mach-Zehnder interferometer, wherein one arm reaches a perimeter safety protection area after passing through long-distance optical fibers, the quantum interferometers are distributed in a certain mode, and long arms of the multipath interferometers are deployed in a grid mode after being distributed;
(3) The two output arms of the quantum interferometer are connected with the single photon detector and analyzed by the association analyzer;
(4) The multi-wavelength quantum light source generates single photons according to a certain pulse period, and the pulse period is basically equal to the time difference between two arms of the unequal arm interferometer;
(5) For a specific quantum interferometer, single photons generated by two adjacent pulses at a time sequence position can reach an interferometer output arm at the same time, and are output in pairs from a certain interferometer output arm with high probability under the influence of the Hong-Ou-Mandel interference effect, and at the moment, the probability theoretical value of coincidence counting measured by the correlation analyzer is 0;
(6) When an intrusion event occurs in the perimeter safety area, the interference arm of the quantum interferometer generates phase deviation under the influence of a pressure signal, and the phase deviation influences quantum interference, so that the coincidence counting rate measured by the association analyzer changes, and the phase deviation and the coincidence counting rate change are in a linear relation in a certain dynamic range;
(7) The intrusion measurement (with higher precision than that based on classical optical interference) is completed by analyzing the phase time-varying signals in the coincidence counting rate demodulation quantum interferometers, and the intrusion event occurrence position is roughly estimated by comparing the measurement results of the two quantum interferometers, so that the perimeter safety function is completed.
The invention provides an embodiment of a high-sensitivity perimeter safety monitoring method based on a distributed quantum interferometer, wherein a multi-wavelength quantum light source generates multiple paths of single photons and inputs the multiple paths of single photons into different quantum interferometers, the quantum interferometers are deployed to different positions of a perimeter safety area in a grid mode, phase fluctuation is measured by utilizing correlation, intrusion events are screened, and the distributed quantum interferometers are connected based on a quantum communication network, so that the high-sensitivity perimeter safety function is realized.
In some embodiments, the quantum communication network uses the quantum state as a carrier for transmission, and the transmission process accords with the Hessenberg measurement inaccuracy principle, the quantum state unclonable principle and the quantum inseparable principle, and a channel of the quantum communication network can be an optical fiber or a free space.
In some embodiments, the quantum state may be a photon or a spin electron, the coding degrees of freedom may be phase, polarization, mode field, arrival time, etc. but must carry the phase information in the quantum sensing signal, and the quantum state may follow a preparation-measurement protocol or an entanglement protocol, and the method is not limited to networking modes, networking protocols, and interconnection means of the quantum communication network.
In some embodiments, the quantum interferometer realizes physical field measurement based on quantum basic characteristics, measurement accuracy can break through classical shot noise limit and approach the seasburgh limit, physical field change caused by various intrusion events can be detected, and detection results can be reflected on quantum state phase information.
In some embodiments, the measured physical quantity includes, but is not limited to, vibration, pressure, temperature, sound, etc., and the responsive particles include, but are not limited to, photons, spintrons, without limiting the specific structure of the quantum interferometer, without limiting the specific manner in which the quantum interferometer is interconnected with the quantum communication network.
In some embodiments, the high sensitivity perimeter security method should be constant for physical fields such as pressure, vibration, temperature, etc. for a specific area, intrusion events will cause changes in the physical fields, thereby producing a phase response within the quantum interferometer, which can have a higher phase measurement accuracy than that of classical optical interferometers.
In some embodiments, perimeter security applications include, but are not limited to, refusal protection of security critical areas such as bank vaults, theft protection of oil pipelines, jump identification of national line guards, identification of bridge bus member fatigue or abnormal deformation, automatic forest fire identification, and the like.
Embodiments of the present invention are not limited to the physical quantities identified by the perimeter security method.
The embodiments of the invention are not limited to the specific occasion of applying the method, and all the methods for realizing the networking sensing function by connecting various sensing quantum interferometers through a quantum communication network are within the scope of the claims of the invention.
The present invention also provides an embodiment of a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described method.
The invention also provides an embodiment of 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, the invention combines the quantum communication technology and the quantum interference technology, and the measurement precision of the perimeter safety system based on optical fiber sensing is obviously improved by means of the high-precision characteristic of quantum interference in the aspect of phase measurement;
Secondly, the technical scheme provided by the invention has certain positioning traceability, can be applied to perimeter safety protection, and can be widely applied to multiple fields of engineering component fatigue test, oil pipeline theft and cutting monitoring and the like;
in addition, the invention changes the single application mode of the traditional quantum communication network for realizing the safe transmission of information, and has profound effects on the development of quantum information technology.
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 the same piece or pieces of software and/or hardware when implementing 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 variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (9)
1. A high-sensitivity perimeter safety monitoring method based on a distributed quantum interferometer comprises the steps of generating multi-wavelength single photons through a multi-wavelength quantum light source, respectively inputting the multi-wavelength single photons into respective quantum interferometers through a wavelength division multiplexing system, wherein the quantum interferometers are unequal-arm interferometers, arranging long arms of the unequal-arm interferometers in a perimeter safety area in a grid mode, and receiving sensing signals; the method comprises the steps of measuring quantum interference by coincidence with counting at the position of a multi-wavelength quantum light source, realizing high-sensitivity sensing of an intrusion event with relatively high phase measurement precision, generating multiple paths of single photons by the multi-wavelength quantum light source and inputting different quantum interferometers, deploying the quantum interferometers to different positions of a perimeter safety area in a grid mode, measuring phase fluctuation by correlation and identifying the intrusion event, connecting the distributed quantum interferometers based on a quantum communication network, and realizing high-sensitivity perimeter safety monitoring.
2. The high-sensitivity perimeter safety monitoring method based on the distributed quantum interferometer according to claim 1, wherein the quantum communication network uses quantum states as carriers for transmission, and the transmission process accords with the hessian misdetection principle, the quantum state unclonable principle and the quantum inseparable principle.
3. The distributed quantum interferometer based high sensitivity perimeter security monitoring method of claim 1 or 2, wherein intrusion events will cause changes in the physical field, thereby producing a phase response within the quantum interferometer.
4. The high-sensitivity perimeter safety monitoring method based on the distributed quantum interferometer according to one of claims 1-3, wherein the quantum interferometer realizes physical field measurement based on quantum basic characteristics, the measurement precision breaks through shot noise limit and approaches to the offshore amberg limit, physical field changes caused by various intrusion events are detected, and the detection result is reflected on quantum state phase information.
5. The distributed quantum interferometer based high sensitivity perimeter security monitoring method of claim 1, comprising:
S101, constructing a multi-path quantum interferometer, generating multi-wavelength single photons through a multi-wavelength quantum light source, and respectively inputting the multi-wavelength single photons into the respective unequal arm interferometers through a wavelength division multiplexing system;
S102, deploying a distributed quantum interferometer, deploying long arms of the unequal arm interferometer in a perimeter safety area in a grid mode, and receiving a sensing signal;
s103, quantum interference is realized, and high-sensitivity sensing of an intrusion event is realized with relatively high phase measurement precision by conforming to counting measurement quantum interference at the position of the multi-wavelength quantum light source.
6. The distributed quantum interferometer based high sensitivity perimeter security monitoring method of claim 1, comprising:
s201, generating multi-wavelength single photons by a multi-wavelength quantum light source, and inputting the single photons into a quantum interferometer;
S202, the structure of the quantum interferometer is an unequal arm Mach-Zehnder interference structure, wherein one arm reaches a perimeter safety protection area after passing through long-distance optical fibers, and long arms of the multipath interferometer are deployed in a grid mode after being arranged;
s203, two output arms of the quantum interferometer are connected with the single photon detector, and the single photon detector is analyzed through the correlation analyzer;
S204, generating single photons by the multi-wavelength quantum light source according to a certain pulse period, wherein the pulse period is basically equal to the time difference between two arms of the unequal arm interferometer;
S205, when an intrusion event occurs in the perimeter safety area, the interference arm of the quantum interferometer generates phase deviation under the influence of a pressure signal, and the phase deviation influences quantum interference, so that the coincidence counting rate measured by the association analyzer changes, and the phase deviation and the coincidence counting rate change are in a linear relation in a certain dynamic range;
S206, demodulating the phase time-varying signals in the quantum interferometers by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the occurrence position of the intrusion event to finish the perimeter safety function.
7. The distributed quantum interferometer based high sensitivity perimeter security monitoring method of claim 1, comprising:
S301, generating multiple paths of same-color single photons by a quantum light source, and inputting the single photons into a quantum interferometer;
S302, the structure of the quantum interferometer is an unequal arm Mach-Zehnder interference structure, wherein one arm reaches a perimeter safety protection area after passing through long-distance optical fibers, and long arms of the multipath interferometer are deployed in a grid mode after being arranged;
s303, two output arms of the quantum interferometer are connected with a single photon detector, and are analyzed through a correlation analyzer;
s304, generating single photons by the multi-wavelength quantum light source according to a certain pulse period, wherein the pulse period is basically equal to the time difference between two arms of the unequal arm interferometer;
s305, when an intrusion event occurs in the perimeter safety area, the interference arm of the quantum interferometer generates phase deviation under the influence of a pressure signal, and the phase deviation influences quantum interference, so that the coincidence counting rate measured by the association analyzer changes, and the phase deviation and the coincidence counting rate change are in a linear relation in a certain dynamic range;
s306, demodulating the phase time-varying signals in the quantum interferometers by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the occurrence position of the intrusion event to finish the perimeter safety function.
8. A system for implementing the distributed quantum interferometer-based high sensitivity perimeter security monitoring method of any of claims 1-7, comprising a quantum interferometer, a multi-wavelength quantum light source and an associated analyzer, the multi-wavelength quantum light source generating multi-wavelength single photons and inputting the multi-wavelength single photons into the quantum interferometer; the structure of the quantum interferometer is an unequal arm Mach-Zehnder interference structure, wherein one arm reaches a perimeter safety protection area after passing through long-distance optical fibers, and long arms of the multipath interferometer are deployed in a grid mode after being arranged; the two output arms of the quantum interferometer are connected with the single photon detector and analyzed by the association analyzer; the multi-wavelength quantum light source generates single photons according to a certain pulse period, and the pulse period is basically equal to the time difference between two arms of the unequal arm interferometer; when an intrusion event occurs in the perimeter safety area, the interference arm of the quantum interferometer generates phase deviation under the influence of a pressure signal, and the phase deviation influences quantum interference, so that the coincidence counting rate measured by the association analyzer changes, and the phase deviation and the coincidence counting rate change are in a linear relation in a certain dynamic range; the intrusion measurement is completed by analyzing the phase time-varying signals in the coincidence counting rate demodulation quantum interferometers, and the intrusion event occurrence position is roughly estimated by comparing the measurement results of the two quantum interferometers, so that the perimeter safety function is completed.
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 1-7.
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