CN114323243A - 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. The invention combines the advantages of distributed layout of the optical fiber sensing perimeter safety system and the high-sensitivity phase measurement characteristic of the quantum interferometer, and the perimeter safety method provided by the invention has higher measurement sensitivity. Meanwhile, the feasibility of the distributed quantum sensing system is explored, and a solution is provided for quantum communication application mode exploration except key distribution.
Description
Technical Field
The invention belongs to the interdiscipline of optical fiber sensing, quantum communication and quantum measurement, in particular to a high-sensitivity perimeter security method for distributively arranging a plurality of paths of optical fiber quantum interferometers in a grid mode and determining an intrusion event related vibration signal according to a quantum interference measurement result, and particularly relates to a high-sensitivity perimeter security monitoring method, a high-sensitivity perimeter security monitoring system and a storage medium based on a distributed quantum interferometer.
Background
The perimeter safety system is an intrusion protection system in safety critical places such as banks and insurance warehouses, 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 with characteristic signals corresponding to intrusion events for discrimination. The perimeter safety system based on the optical principle has the characteristic of high sensitivity, is the main implementation mode of the current perimeter safety system, and comprises an infrared detection and identification system (for identifying infrared signals sent by an intruder and giving an alarm), a return light path detection and identification system (for giving an alarm when the intruder blocks a light path) and an optical fiber sensing perimeter safety system (the effective refractive index of an optical fiber is changed due to vibration or pressure signals generated by the intruder). For perimeter safety application with a wide deployment range, the optical fiber sensing perimeter safety system has unique advantages, vibration signals in a large range can be comprehensively sensed by arranging long-distance optical fibers, and the optical fiber sensing perimeter safety system has important application value in special fields such as national boundary line protection and oil pipeline protection. 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 physical quantity sensing in a large range.
In a strict sense, any system involving long-distance transmission of quantum states can be a quantum communication system, and a quantum interferometer can perform a sensing function similar to that of a classical optical interferometer, but can have higher phase measurement accuracy (based on a coincidence technology).
Disclosure of Invention
Based on the problems of the prior art, the technical problems to be solved by the invention are as follows: 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, the quantum interferometer is deployed at different positions of a perimeter safety region, a vibration signal caused by an intrusion event changes the relative phase difference of the quantum interferometer, high-sensitivity measurement of the phase difference is realized by coincidence counting measurement, and a new mode of application of a distributed quantum sensing network is explored.
Aiming at the defects in the prior art, the invention aims to provide 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, deploying 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 at the position of a multi-wavelength quantum light source through coincidence counting, realizing high-sensitivity perception of an intrusion event with relatively high phase measurement precision, generating multiple paths of single photons by the multi-wavelength quantum light source, inputting the multiple paths of single photons into different quantum interferometers, deploying the quantum interferometers to different positions of a perimeter safety area in a grid mode, measuring phase fluctuation by using correlation, identifying the intrusion event, connecting a distributed quantum interferometer based on a quantum communication network, and realizing high-sensitivity perimeter safety monitoring.
Preferably, the quantum communication network transmits by taking a quantum state as a carrier, and the transmission process conforms to the heisenberg inaccurate measurement 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 Heisenberg limit, physical field changes caused by various invasion events are detected, and the detection result is reflected on quantum state phase information.
Preferably, the method specifically comprises:
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 to respective unequal-arm interferometers through a wavelength division multiplexing system;
s102, deploying a distributed quantum interferometer, deploying a long arm of an unequal arm interferometer in a perimeter safety area according to a grid mode, and receiving a sensing signal;
and S103, quantum interference is realized, and the quantum interference is measured through coincidence counting at the position of the multi-wavelength quantum light source, so that the high-sensitivity perception of the intrusion event is realized with relatively high phase measurement precision.
Preferably, the method specifically comprises:
s201, generating a multi-wavelength single photon by a multi-wavelength quantum light source, and inputting the multi-wavelength single photon into a quantum interferometer;
s202, the structure of the quantum interferometer is an unequal-arm Mach Zehnder interferometer structure, one arm of the quantum interferometer reaches a perimeter safety protection area after passing through a long-distance optical fiber, and long arms of a multi-path interferometer are arranged in a grid mode;
s203, connecting the two output arms of the quantum interferometer with a single photon detector, and analyzing by a 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 invasion event occurs in the perimeter safety area, an interference arm of the quantum interferometer generates phase shift under the influence of a pressure signal, the phase shift influences the quantum interference, so that the coincidence counting rate measured by the correlation analyzer changes, and the phase shift and the coincidence counting rate change are in a linear relation in a certain dynamic range;
s206, demodulating phase time-varying signals in the quantum interferometer by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the position of an intrusion event to finish the perimeter safety function.
Preferably, the method specifically comprises:
s301, generating multiple paths of homochromatic single photons by a quantum light source, and inputting the multiple paths of homochromatic single photons into a quantum interferometer;
s302, the structure of the quantum interferometer is an unequal-arm Mach Zehnder interferometer structure, one arm of the quantum interferometer reaches a perimeter safety protection area after passing through a long-distance optical fiber, and long arms of the multi-path interferometer are arranged in a grid mode;
s303, connecting the two output arms of the quantum interferometer with a single photon detector, and analyzing by 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 invasion event occurs in the perimeter safety area, an interference arm of the quantum interferometer generates phase shift under the influence of a pressure signal, the phase shift influences the quantum interference, so that the coincidence counting rate measured by the correlation analyzer changes, and the phase shift and the coincidence counting rate change are in a linear relation in a certain dynamic range;
s306, demodulating phase time-varying signals in the quantum interferometer by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the position of an 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 may arrive at an output arm of the interferometer at the same time, and are output from the output arm of the interferometer in pairs with a high probability under the influence of the Hong-Ou-Mandel interference effect, and at this time, 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 multi-wavelength single photons into the quantum interferometer; the structure of the quantum interferometer is an unequal-arm Mach Zehnder interferometer structure, wherein one arm reaches a perimeter safety protection area after passing through a long-distance optical fiber, and long arms of the multi-path interferometer are arranged in a grid mode after being distributed; two output arms of the quantum interferometer are connected with the single photon detector and are analyzed by the correlation 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 invasion event occurs in a perimeter safety area, an interference arm of the quantum interferometer generates phase shift under the influence of a pressure signal, the phase shift influences quantum interference, so that the coincidence counting rate detected by the correlation analyzer changes, and the phase shift and the coincidence counting rate change are in a linear relation in a certain dynamic range; and demodulating a phase time-varying signal in the quantum interferometer by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the position of the intrusion event to finish the perimeter safety function.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the above-mentioned method.
A computer program product comprising computer programs/instructions which, when executed by a processor, implement the steps of the above-described method.
Compared with the prior art, the invention has the following advantages:
1. the invention combines the quantum communication technology and the quantum interference technology, and obviously improves the measurement precision of the perimeter safety system based on optical fiber sensing by means of the high-precision characteristic of the quantum interference in the phase measurement aspect;
2. the technical scheme provided by the invention has certain positioning traceability capability, can be applied to perimeter safety protection, and can be widely applied to various fields such as engineering component fatigue test, oil pipeline stealing and cutting monitoring and the like;
3. the invention changes the single application mode of the traditional quantum communication network for realizing the information security transmission and has profound influence on the development of the quantum information technology.
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In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 shows a schematic diagram of the high-sensitivity perimeter safety monitoring working principle of the distributed quantum interferometer-based high-sensitivity perimeter safety monitoring system.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting 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 present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 identical 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, deploying long arms of the unequal arm interferometers in a perimeter safety area according to a grid mode, and receiving sensing signals; the method comprises the steps of measuring quantum interference at the position of a multi-wavelength quantum light source through coincidence counting, realizing high-sensitivity perception of an intrusion event with relatively high phase measurement precision, generating multiple paths of single photons by the multi-wavelength quantum light source, inputting the multiple paths of single photons into different quantum interferometers, deploying the quantum interferometers to different positions of a perimeter safety area in a grid mode, measuring phase fluctuation by using correlation, identifying the intrusion event, connecting a distributed quantum interferometer based on a quantum communication network, and realizing high-sensitivity perimeter safety monitoring.
In some embodiments, the quantum communication network transmits by taking a quantum state as a carrier, and the transmission process conforms to the heisenberg inaccuracy measuring principle, the quantum state non-cloning principle and the quantum non-separability principle.
In some embodiments, an intrusion event will cause a change in the physical field, which in turn produces 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 Heisenberg limit, physical field changes caused by various invasion events are detected, and the detection result is reflected on quantum state phase information.
The invention provides an embodiment of a high-sensitivity perimeter safety monitoring method 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 to respective unequal-arm interferometers through a wavelength division multiplexing system;
s102, deploying a distributed quantum interferometer, deploying a long arm of an unequal arm interferometer in a perimeter safety area according to a grid mode, and receiving a sensing signal;
and S103, quantum interference is realized, and the quantum interference is measured through coincidence counting at the position of the multi-wavelength quantum light source, so that the high-sensitivity perception of the intrusion event is realized with relatively high phase measurement precision.
The invention provides an embodiment of a high-sensitivity perimeter safety monitoring method based on a distributed quantum interferometer, which comprises the following steps:
s201, generating a multi-wavelength single photon by a multi-wavelength quantum light source, and inputting the multi-wavelength single photon into a quantum interferometer;
s202, the structure of the quantum interferometer is an unequal-arm Mach Zehnder interferometer structure, one arm of the quantum interferometer reaches a perimeter safety protection area after passing through a long-distance optical fiber, and long arms of a multi-path interferometer are arranged in a grid mode;
s203, connecting the two output arms of the quantum interferometer with a single photon detector, and analyzing by a 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 invasion event occurs in the perimeter safety area, an interference arm of the quantum interferometer generates phase shift under the influence of a pressure signal, the phase shift influences the quantum interference, so that the coincidence counting rate measured by the correlation analyzer changes, and the phase shift and the coincidence counting rate change are in a linear relation in a certain dynamic range;
s206, demodulating phase time-varying signals in the quantum interferometer by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the position of an intrusion event to finish the perimeter safety function.
The invention provides an embodiment of a high-sensitivity perimeter safety monitoring method based on a distributed quantum interferometer, which comprises the following steps:
s301, generating multiple paths of homochromatic single photons by a quantum light source, and inputting the multiple paths of homochromatic single photons into a quantum interferometer;
s302, the structure of the quantum interferometer is an unequal-arm Mach Zehnder interferometer structure, one arm of the quantum interferometer reaches a perimeter safety protection area after passing through a long-distance optical fiber, and long arms of the multi-path interferometer are arranged in a grid mode;
s303, connecting the two output arms of the quantum interferometer with a single photon detector, and analyzing by 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 invasion event occurs in the perimeter safety area, an interference arm of the quantum interferometer generates phase shift under the influence of a pressure signal, the phase shift influences the quantum interference, so that the coincidence counting rate measured by the correlation analyzer changes, and the phase shift and the coincidence counting rate change are in a linear relation in a certain dynamic range;
s306, demodulating phase time-varying signals in the quantum interferometer by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the position of an intrusion event to finish the perimeter safety function.
In some embodiments, for a specific quantum interferometer, single photons generated by two adjacent pulses in a time sequence position may arrive at the output arms of the interferometer at the same time, and are output from one output arm of the interferometer in pairs with a 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.
The invention provides a system embodiment for realizing a high-sensitivity perimeter safety monitoring method based on a distributed quantum interferometer, which comprises the quantum interferometer, a multi-wavelength quantum light source and an association 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 interferometer structure, wherein one arm reaches a perimeter safety protection area after passing through a long-distance optical fiber, and long arms of the multi-path interferometer are arranged in a grid mode after being distributed; two output arms of the quantum interferometer are connected with the single photon detector and are analyzed by the correlation 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 invasion event occurs in a perimeter safety area, an interference arm of the quantum interferometer generates phase shift under the influence of a pressure signal, the phase shift influences quantum interference, so that the coincidence counting rate detected by the correlation analyzer changes, and the phase shift and the coincidence counting rate change are in a linear relation in a certain dynamic range; and demodulating a phase time-varying signal in the quantum interferometer by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the position of the intrusion event to finish the perimeter safety function.
As shown in fig. 1, an embodiment of a high-sensitivity perimeter security system based on a distributed quantum interferometer is shown, wherein a gray area is a perimeter security area, the implementation steps are as follows:
(1) the multi-wavelength quantum light source generates multi-wavelength single photons or the quantum light source generates multi-path homochromatic single photons and inputs the multi-path homochromatic single photons into the quantum interferometer;
(2) the structure of the quantum interferometer is an unequal-arm Mach Zehnder interferometer, wherein one arm reaches a perimeter safety protection area after passing through a long-distance optical fiber and is arranged in a certain mode, and long arms of a multi-path interferometer are arranged in a grid mode after being arranged;
(3) two output arms of the quantum interferometer are connected with the single photon detector and are analyzed by the correlation 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 output arm of the interferometer at the same time, and are output in pairs from the output arm of the interferometer at a 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;
(6) when an invasion event occurs in a perimeter safety area, an interference arm of the quantum interferometer generates phase shift under the influence of a pressure signal, the phase shift influences quantum interference, so that the coincidence counting rate detected by the correlation analyzer changes, and the phase shift and the coincidence counting rate change are in a linear relation in a certain dynamic range;
(7) the phase time-varying signals in the quantum interferometer are demodulated by analyzing the coincidence counting rate, intrusion measurement (the precision is higher than that based on classical optical interference) is completed, the measurement results of the two quantum interferometers are compared to roughly estimate the position of an intrusion event, and 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.
In some embodiments, the quantum communication network transmits with quantum state as a carrier, the transmission process conforms to the heisenberg inaccuracy measuring principle, the quantum state non-cloning principle and the quantum non-separable 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 spintronic, the encoding degree of freedom may be phase, polarization, mode field, arrival time, etc. but must carry phase information in the quantum sensing signal, may follow a preparation-measurement protocol, may also follow an entanglement protocol, and does not limit the networking mode, networking protocol, and interconnection means of the quantum communication network.
In some embodiments, the quantum interferometer realizes physical field measurement based on quantum basic characteristics, the measurement precision can break through the limit of classical shot noise and approach the limit of Heisenberg, physical field changes caused by various invasion events can be detected, and the detection result 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 particle includes, but is not limited to, photons, spintrons, without defining the specific structure of the quantum interferometer, without defining the specific interconnection of the quantum interferometer with the quantum communication network.
In some embodiments, a high sensitivity perimeter security method, where the physical field of pressure, vibration, temperature, etc. should be constant for a particular area, an intrusion event will cause a change in the physical field, which in turn produces a phase response within the quantum interferometer, which can have a higher phase measurement accuracy than a classical optical interferometer.
In some embodiments, perimeter security applications include, but are not limited to, denial protection of security critical areas such as bank vaults, theft protection of oil pipelines, rollover recognition of border line guard rails, recognition of bridge bus component fatigue or abnormal deformation, automatic recognition of forest fires, and the like.
Embodiments of the invention do not limit the physical quantities identified by the perimeter security method.
The embodiments of the present invention do not limit the specific application of the method, and the method for realizing the networking sensing function by connecting various sensing quantum interferometers through a quantum communication network is within the scope of the claims of the present invention.
The invention also provides an embodiment of a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the above-mentioned 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 obviously improves the measurement precision of the perimeter safety system based on optical fiber sensing by means of the high-precision characteristic of the quantum interference in the phase measurement aspect;
secondly, the technical scheme provided by the invention has certain positioning traceability capability, can be applied to perimeter safety protection, and can be widely applied to various fields such as engineering component fatigue test, oil pipeline stealing and cutting monitoring and the like;
in addition, the invention changes the single application mode of the traditional quantum communication network for realizing the information security transmission and has profound influence on the development of the quantum information technology.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
As will be appreciated by one skilled in the art, 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
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 computer storage media 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 that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A high-sensitivity perimeter safety monitoring method based on a distributed quantum interferometer generates multi-wavelength single photons through a multi-wavelength quantum light source, respectively inputs the multi-wavelength single photons to 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 perimeter safety areas in a grid mode, and sensing signals are received; the method comprises the steps of measuring quantum interference at the position of a multi-wavelength quantum light source through coincidence counting, realizing high-sensitivity perception of an intrusion event with relatively high phase measurement precision, generating multiple paths of single photons by the multi-wavelength quantum light source, inputting the multiple paths of single photons into different quantum interferometers, deploying the quantum interferometers to different positions of a perimeter safety area in a grid mode, measuring phase fluctuation by using correlation, identifying the intrusion event, connecting a distributed quantum interferometer 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 transmits by taking a quantum state as a carrier, and the transmission process conforms to a Heisenberg inaccurate measurement principle, a quantum state unclonable principle and a quantum inseparable principle.
3. The distributed quantum interferometer based high sensitivity perimeter security monitoring method as claimed in claim 1 or 2, wherein the intrusion event will cause a change in the physical field, which in turn generates a phase response within the quantum interferometer.
4. The high-sensitivity perimeter safety monitoring method based on the distributed quantum interferometer according to any one of claims 1 to 3, wherein the quantum interferometer realizes physical field measurement based on quantum basic characteristics, the measurement precision breaks through the shot noise limit and approaches the Heisebauer limit, the physical field change caused by various invasion events is 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 to respective unequal-arm interferometers through a wavelength division multiplexing system;
s102, deploying a distributed quantum interferometer, deploying a long arm of an unequal arm interferometer in a perimeter safety area according to a grid mode, and receiving a sensing signal;
and S103, quantum interference is realized, and the quantum interference is measured through coincidence counting at the position of the multi-wavelength quantum light source, so that the high-sensitivity perception of the intrusion event is realized with relatively high phase measurement precision.
6. The distributed quantum interferometer based high-sensitivity perimeter security monitoring method of claim 1, comprising:
s201, generating a multi-wavelength single photon by a multi-wavelength quantum light source, and inputting the multi-wavelength single photon into a quantum interferometer;
s202, the structure of the quantum interferometer is an unequal-arm Mach Zehnder interferometer structure, one arm of the quantum interferometer reaches a perimeter safety protection area after passing through a long-distance optical fiber, and long arms of a multi-path interferometer are arranged in a grid mode;
s203, connecting the two output arms of the quantum interferometer with a single photon detector, and analyzing by a 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 invasion event occurs in the perimeter safety area, an interference arm of the quantum interferometer generates phase shift under the influence of a pressure signal, the phase shift influences the quantum interference, so that the coincidence counting rate measured by the correlation analyzer changes, and the phase shift and the coincidence counting rate change are in a linear relation in a certain dynamic range;
s206, demodulating phase time-varying signals in the quantum interferometer by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the position of an 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 homochromatic single photons by a quantum light source, and inputting the multiple paths of homochromatic single photons into a quantum interferometer;
s302, the structure of the quantum interferometer is an unequal-arm Mach Zehnder interferometer structure, one arm of the quantum interferometer reaches a perimeter safety protection area after passing through a long-distance optical fiber, and long arms of the multi-path interferometer are arranged in a grid mode;
s303, connecting the two output arms of the quantum interferometer with a single photon detector, and analyzing by 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 invasion event occurs in the perimeter safety area, an interference arm of the quantum interferometer generates phase shift under the influence of a pressure signal, the phase shift influences the quantum interference, so that the coincidence counting rate measured by the correlation analyzer changes, and the phase shift and the coincidence counting rate change are in a linear relation in a certain dynamic range;
s306, demodulating phase time-varying signals in the quantum interferometer by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the position of an intrusion event to finish the perimeter safety function.
8. The high-sensitivity perimeter safety monitoring method based on the distributed quantum interferometer according to claim 6 or 7, for a specific quantum interferometer, single photons generated by two adjacent pulses in a time sequence position may reach an output arm of the interferometer at the same time, and are output from the output arm of the interferometer in pairs with a high probability under the influence of the Hong-Ou-Mandel interference effect, and at this time, the probability theoretical value of coincidence counting measured by the correlation analyzer is 0.
9. A system for implementing the distributed quantum interferometer based high-sensitivity perimeter security monitoring method of claims 1-8, comprising 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 interferometer structure, wherein one arm reaches a perimeter safety protection area after passing through a long-distance optical fiber, and long arms of the multi-path interferometer are arranged in a grid mode after being distributed; two output arms of the quantum interferometer are connected with the single photon detector and are analyzed by the correlation 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 invasion event occurs in a perimeter safety area, an interference arm of the quantum interferometer generates phase shift under the influence of a pressure signal, the phase shift influences quantum interference, so that the coincidence counting rate detected by the correlation analyzer changes, and the phase shift and the coincidence counting rate change are in a linear relation in a certain dynamic range; and demodulating a phase time-varying signal in the quantum interferometer by analyzing the coincidence counting rate to finish intrusion measurement, and comparing the measurement results of the two quantum interferometers to roughly estimate the position of the intrusion event to finish the perimeter safety function.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method of any one of claims 1 to 8.
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