CN113472452A - Quantum sensing networking method based on wavelength division multiplexing entangled light source - Google Patents
Quantum sensing networking method based on wavelength division multiplexing entangled light source Download PDFInfo
- Publication number
- CN113472452A CN113472452A CN202110723887.7A CN202110723887A CN113472452A CN 113472452 A CN113472452 A CN 113472452A CN 202110723887 A CN202110723887 A CN 202110723887A CN 113472452 A CN113472452 A CN 113472452A
- Authority
- CN
- China
- Prior art keywords
- quantum
- entangled
- division multiplexing
- wavelength division
- sensing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/70—Photonic quantum communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
Abstract
The invention discloses a quantum sensing networking method based on a wavelength division multiplexing entangled light source, which utilizes a spontaneous nonlinear effect in a nonlinear microcavity to realize frequency domain comb-distributed multi-wavelength entangled photon output, distributes entangled single photons with equal frequency intervals and pairwise matching to different point positions through a mature dense wavelength division multiplexing system in a classical optical fiber communication system, arranges quantum sensors represented by wavelength-independent quantum interferometers at different point positions, realizes networking interconnection of the quantum sensors through quantum entanglement distribution, can acquire sensing information of all the point positions in a quantum sensing network from any point position, and realizes distributed cooperative sensing and other leading-edge applications. The invention utilizes the independent quantum network server, the quantum interferometer with multi-point arrangement and the single photon detector controlled according to the requirement, realizes the function of the topological variable distributed quantum sensing network, expands the application range of quantum communication and quantum network, and provides a solution for the integration of quantum internet construction and quantum information technology.
Description
Technical Field
The invention belongs to the interdisciplinary field of nonlinear optics, quantum detection, quantum communication and quantum networks, in particular to a method for realizing the output of frequency domain comb-distributed wavelength division multiplexing entangled photons by utilizing a spontaneous nonlinear effect in a nonlinear microcavity and constructing a quantum sensing network by a dense wavelength division multiplexing system and a wavelength-independent quantum interferometer, and particularly relates to a quantum sensing networking method and system based on a wavelength division multiplexing entangled light source and a storage medium.
Background
The quantum is a basic unit of energy, has the characteristic of inseparability, and can effectively avoid the risk of separation and eavesdropping in the information transmission process by taking a single quantum (such as a photon) as an information carrier; the heisenberg inaccuracy measurement principle in quantum mechanics determines that all state information of an unknown quantum cannot be accurately obtained before measurement, and the quantum unclonable principle determines that all state information of a quantum which is measured cannot be copied in a full-dimension mode. In view of the fact that the quantum serving as an information carrier or a key carrier cannot be forged or predicted by an attacker, quantum communication becomes a novel communication technology with mathematically proven safety, and has a great application prospect in the aspect of safety concern information transmission.
On the other hand, the quantum precision measurement technology represented by the quantum interferometer is rapidly developed in recent years, and powerful support is provided for various precision measurement applications which break through the classic bottleneck and reach the Heisenberg limit. However, an effective networking quantum state transmission means is lacked at the present stage, and various quantum sensors based on the quantum precision measurement technology can only be arranged at a single point position and cannot be networked and interconnected to form a distributed sensing capability.
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 construct a distributed quantum sensing network with variable topology and full network cooperation.
Aiming at the defects in the prior art, the invention aims to provide a quantum sensing networking method based on a wavelength division multiplexing entangled light source, which utilizes a nonlinear microcavity spontaneous nonlinear effect to generate entangled single photons with equal frequency and pairwise matching, utilizes a dense wavelength division multiplexing system in classical optical fiber communication to distribute the entangled single photons with different wavelengths to different point positions, arranges quantum sensors at each point position, realizes the over-distance sharing of quantum sensing information of different point positions through the interaction of the entangled photons and the quantum sensors, the relevance between the entangled photons and single photon detection, and finally constructs a distributed quantum sensing network with variable topology and full network cooperation.
In order to achieve the effect, the quantum sensing networking method based on the wavelength division multiplexing entangled light source is realized by a spontaneous frequency down-conversion effect in a second-order nonlinear microcavity or a spontaneous four-wave mixing effect in a third-order nonlinear microcavity, and the entangled photons which are distributed in a frequency domain comb shape and in pairs according to wavelength are output by means of band-pass filtering and resonance enhancement effects of the microcavity; the high-precision sensing of specific point positions and specific physical quantities is realized by taking quanta as media through a quantum precision measurement means; entangled photons with different wavelengths are distributed to different sensing point positions through a wavelength division multiplexing system and are effectively connected with quantum sensors, multi-point position sharing of quantum sensing information is achieved through correlation measurement among the entangled photons, sensing information of other point positions is obtained through entanglement correlation measurement at a certain specific point position, and the function of topology-variable distributed quantum sensing networking is achieved.
Preferably, the method realizes the multi-wavelength entangled photon output in the comb-shaped distribution of the frequency domain through the spontaneous nonlinear effect in the optical micro-cavity, and realizes the multi-wavelength entangled photon output by utilizing the spontaneous frequency down-conversion effect in the second-order nonlinear medium micro-cavity or the spontaneous four-wave mixing effect in the third-order nonlinear medium micro-cavity, and the output photons need to have higher spectral brightness, be in the comb-shaped distribution in the frequency domain and have certain predictability in the time domain.
Preferably, the method constructs a quantum network server through a wavelength division multiplexing system, interconnects quantum sensors into a network according to a quantum sensing network topology, divides a multi-wavelength entanglement light source into a signal group and an idler group, and distributes each wavelength photon of the signal group and the idler group to quantum sensors at different point positions according to an entanglement association relationship, so that at least one pair of entanglement photons is shared between any two quantum sensors.
Preferably, the method converts the physical quantity to be measured into a quantum state by using the quantum sensor and detects the quantum state by using the single photon detector, meanwhile, the omni-directional acquisition of the whole network quantum sensing information is realized at a certain specific point according to the measurement result of the entanglement association relationship, the on-demand modification of the quantum sensing network topology is realized by changing the channel configuration scheme of the wavelength division multiplexing system, and finally, the function of the topology adjustable distributed quantum sensing network is realized.
Preferably, the method generates the entangled single photons with equal frequency and pairwise matching at intervals by utilizing the nonlinear microcavity spontaneous nonlinear effect, distributes the entangled single photons with different wavelengths to different points by utilizing a dense wavelength division multiplexing system in classical optical fiber communication, arranges quantum sensors at each point, realizes the super-distance sharing of quantum sensing information at different points through the interaction between the entangled photons and the quantum sensors, the relevance between the entangled photons and the single photon detection, and finally constructs a distributed quantum sensing network with variable topology and full network cooperation.
Preferably, the method is realized by utilizing a spontaneous frequency down-conversion effect in a second-order nonlinear medium micro cavity or a spontaneous four-wave mixing effect in a third-order nonlinear medium micro cavity, and output photons need to have higher spectral brightness, comb-shaped distribution in a frequency domain and certain predictability in a time domain.
Preferably, the quantum sensor is mainly based on a quantum precision measurement principle, converts a physical quantity to be measured into a quantum state and detects and analyzes the quantum state through a single photon detector and other devices, and the quantum sensor can be interconnected with a quantum communication system.
Preferably, the wavelength division multiplexing designs a network topology as required according to the point location distribution of each quantum sensor, calculates the number relationship of quantum state transmission links according to the network topology, combines single photons with entanglement association into the same optical path through a dense wavelength division multiplexing system and distributes the single photons to quantum sensors of corresponding point locations, the quantum sensors of specific point locations separate photons entangled with quantum sensors of different point locations into different optical paths through the wavelength division multiplexing system and detect the photons respectively through a single photon detector, and the whole network quantum sensing information can be obtained by performing time-frequency analysis on detection results.
A system for realizing the quantum sensing networking method based on the wavelength division multiplexing entangled light source comprises an optical microcavity, a single photon detector, a plurality of wavelength division multiplexers and a quantum sensor, wherein the multi-wavelength entangled photons with comb-shaped distribution in a frequency domain are output through a spontaneous nonlinear effect in the optical microcavity, the multi-wavelength entangled photons are output by utilizing a spontaneous frequency down-conversion effect in a second-order nonlinear medium microcavity or a spontaneous four-wave mixing effect in a third-order nonlinear medium microcavity, and the output photons need to have higher spectral brightness, comb-shaped distribution in the frequency domain and certain predictability in a time domain; constructing a quantum network server through a wavelength division multiplexing system, interconnecting quantum sensors into a network according to a quantum sensing network topology, dividing a multi-wavelength entanglement light source into a signal group and an idler frequency group, and distributing each wavelength photon of the signal group and the idler frequency group to quantum sensors at different point positions according to an entanglement association relation, so that at least one pair of entangled photons is shared between any two quantum sensors; the method comprises the steps of converting physical quantity to be measured into a quantum state by using a quantum sensor, detecting the quantum state by using a single photon detector, realizing all-dimensional acquisition of whole-network quantum sensing information at a certain specific point according to a measurement result of an entanglement association relation, realizing on-demand modification of a quantum sensing network topology by changing a channel configuration scheme of a wavelength division multiplexing system, and finally realizing a topology-adjustable distributed quantum sensing network 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.
The invention utilizes the independent quantum network server, the quantum interferometer with multi-point arrangement and the single photon detector controlled according to the requirement, realizes the function of the topological variable distributed quantum sensing network, expands the application range of quantum communication and quantum network, and provides a solution for the integration of quantum internet construction and quantum information technology.
Drawings
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 is a schematic diagram illustrating a wavelength division multiplexing entangled light source-based quantum sensing networking method according to the present invention;
fig. 2 shows a basic principle diagram of quantum sensing networking based on wavelength division multiplexing entangled light source.
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 quantum sensing networking method based on a wavelength division multiplexing entangled light source, which is realized by a spontaneous frequency down-conversion effect in a second-order nonlinear microcavity or a spontaneous four-wave mixing effect in a third-order nonlinear microcavity, and the entangled photons which are distributed in a frequency domain comb shape and in pairs according to wavelength are output by means of band-pass filtering and resonance enhancement effects of the microcavity; the high-precision sensing of specific point positions and specific physical quantities is realized by taking quanta as media through a quantum precision measurement means; entangled photons with different wavelengths are distributed to different sensing point positions through a wavelength division multiplexing system and are effectively connected with quantum sensors, multi-point position sharing of quantum sensing information is achieved through correlation measurement among the entangled photons, sensing information of other point positions is obtained through entanglement correlation measurement at a certain specific point position, and the function of topology-variable distributed quantum sensing networking is achieved.
In some embodiments, the multi-wavelength entangled photon output with comb-shaped distribution in the frequency domain is realized by a spontaneous nonlinear effect in the optical micro-cavity, and is realized by a spontaneous frequency down-conversion effect in the second-order nonlinear medium micro-cavity or a spontaneous four-wave mixing effect in the third-order nonlinear medium micro-cavity, and the output photons need to have higher spectral brightness, comb-shaped distribution in the frequency domain and certain predictability in the time domain.
In some embodiments, a quantum network server is constructed through a wavelength division multiplexing system, quantum sensors are interconnected into a network according to a quantum sensing network topology, a multi-wavelength entanglement light source is divided into a signal group and an idler group, and each wavelength photon of the signal group and the idler group is distributed to quantum sensors at different point positions according to an entanglement association relation, so that at least one pair of entangled photons is shared between any two quantum sensors.
In some embodiments, a quantum sensor is used for converting a physical quantity to be measured into a quantum state and detecting the quantum state through a single photon detector, meanwhile, the all-around acquisition of the whole-network quantum sensing information is realized at a certain specific point according to the measurement result of the entanglement association relationship, the on-demand modification of the quantum sensing network topology is realized by changing the channel configuration scheme of the wavelength division multiplexing system, and finally, the function of the topology-adjustable distributed quantum sensing network is realized.
In some embodiments, the non-linear microcavity spontaneous non-linear effect is used for generating the entangled single photons with equal frequency intervals and pairwise matching, the dense wavelength division multiplexing system in classical optical fiber communication is used for distributing the entangled single photons with different wavelengths to different point positions, quantum sensors are arranged at the point positions, the quantum sensing information at the different point positions is subjected to super-distance sharing through interaction between the entangled photons and the quantum sensors, relevance between the entangled photons and single photon detection, and finally the distributed quantum sensing network with variable topology and full network cooperation is constructed.
In some embodiments, the output photons need to have higher spectral brightness, comb-shaped distribution in the frequency domain, and certain predictability in the time domain by utilizing the spontaneous frequency down-conversion effect in the second-order nonlinear medium micro-cavity or the spontaneous four-wave mixing effect in the third-order nonlinear medium micro-cavity.
In some embodiments, the quantum sensor is mainly based on a quantum precision measurement principle, converts a physical quantity to be measured into a quantum state and detects and analyzes the quantum state through a single photon detector and other devices, and the quantum sensor can be interconnected with a quantum communication system.
In some embodiments, wavelength division multiplexing designs a network topology as required according to the point location distribution of each quantum sensor, calculates the number relation of quantum state transmission links according to the network topology, combines single photons with entanglement association into the same optical path through a dense wavelength division multiplexing system and distributes the single photons to quantum sensors of corresponding point locations, the quantum sensors of specific point locations separate photons entangled with quantum sensors of different point locations into different optical paths through the wavelength division multiplexing system and detect the photons respectively through a single photon detector, and the whole network quantum sensing information can be obtained by performing time-frequency analysis on detection results.
The invention provides a quantum sensing networking system based on a wavelength division multiplexing entanglement light source, which comprises an optical microcavity, a single photon detector, a plurality of wavelength division multiplexers and a quantum sensor, wherein the multi-wavelength entanglement photon output in comb-shaped distribution of a frequency domain is realized through a spontaneous nonlinear effect in the optical microcavity, the output is realized by utilizing a spontaneous frequency down-conversion effect in a second-order nonlinear medium microcavity or utilizing a spontaneous four-wave mixing effect in a third-order nonlinear medium microcavity, and the output photon needs to have higher spectral brightness, be in comb-shaped distribution in the frequency domain and have certain predictability in a time domain; constructing a quantum network server through a wavelength division multiplexing system, interconnecting quantum sensors into a network according to a quantum sensing network topology, dividing a multi-wavelength entanglement light source into a signal group and an idler frequency group, and distributing each wavelength photon of the signal group and the idler frequency group to quantum sensors at different point positions according to an entanglement association relation, so that at least one pair of entangled photons is shared between any two quantum sensors; the method comprises the steps of converting physical quantity to be measured into a quantum state by using a quantum sensor, detecting the quantum state by using a single photon detector, realizing all-dimensional acquisition of whole-network quantum sensing information at a certain specific point according to a measurement result of an entanglement association relation, realizing on-demand modification of a quantum sensing network topology by changing a channel configuration scheme of a wavelength division multiplexing system, and finally realizing a topology-adjustable distributed quantum sensing network function.
As shown in fig. 1, the present invention provides an embodiment of a quantum sensing networking method based on a wavelength division multiplexing entangled light source, including:
s101, generating multi-wavelength entangled photons, mainly by a spontaneous frequency down-conversion effect in a second-order nonlinear microcavity or a spontaneous four-wave mixing effect in a third-order nonlinear microcavity, and simultaneously realizing frequency domain comb distribution and entangled photon output distributed in pairs according to wavelengths by means of band-pass filtering and resonance enhancement effects of the microcavity;
s102, quantum sensors are arranged, and high-precision sensing of specific point positions and specific physical quantities is achieved by taking quanta as media through an equivalent quantum precision measurement means of a wavelength-independent quantum interferometer;
s103, quantum sensing network construction, namely distributing entangled photons with different wavelengths to different sensing point positions through a wavelength division multiplexing system and effectively connecting the entangled photons with quantum sensors, realizing multi-point position sharing of quantum sensing information through correlation measurement among the entangled photons, and acquiring sensing information of other point positions at a certain specific point position through entanglement correlation measurement to realize the function of topology-variable distributed quantum sensing networking.
As shown in fig. 2, the present invention shows an embodiment of a wavelength division multiplexing quantum sensing networking method, including:
(1) coupling the pumping light field into a micro cavity formed by three-order nonlinear media and enabling the pumping light field to coincide with one resonant wavelength of the nonlinear micro cavity; the spontaneous four-wave mixing effect can meet the quasi-phase matching condition in a broadband range and generate entangled photons with frequency domains symmetrically distributed along the pumping wavelength axis; besides the filtering effect on the output spectrum, the microcavity resonance also generates a nonlinear enhancement effect on the resonance wavelength, so that the finally output multi-wavelength entangled photons are distributed in a comb shape in the frequency domain, and the comb teeth are superposed with the resonance wavelength of the micro-ring.
(2) Two channels of photons which are symmetrically distributed along the left and right axes of the pumping wavelength can establish entanglement association, and the entanglement photons in the wavelength channels of Ch1-Ch2-Ch3, Ch4-Ch5-Ch10, Ch6-Ch8-Ch11 and Ch7-Ch9-Ch12 are sent to four point positions of Alice, Bob, Charlie and Dave through a wavelength division multiplexer; and (3) carrying out interference measurement on the entangled photons reaching each point by a tunable Michelson quantum interferometer, and finally establishing a one-to-one correspondence relationship between the tunable optical path difference of the interferometer and the physical quantity to be sensed by a single photon detector to complete the construction of the quantum sensing end equipment.
(3) Taking a certain point location as an example, the interferometer at Alice senses the physical quantity to be measured and changes the optical path difference of the quantum interferometer, the optical path difference can be detected by the single-photon detector and analyzed by the time analyzer, and the quantum interferometer taking the single-photon as the physical quantity has higher sensitivity than the classical interferometer. Through three different single photon detectors, the Alice point can sense the relative phase difference of the Bob point (by virtue of the entanglement association of Ch3-Ch 110), the Charlie point (by virtue of the entanglement association of Ch2-CH 11) and the Dave point (by virtue of the entanglement association of Ch1-CH 12), namely the quantum sensing information of other three points can be acquired at any time. It should be noted that the fully-interconnected quantum sensing network is shown in the figure, and is the most wired network in all network topologies. In practical application, if the topological structure needs to be changed, only the allocation scheme of the channels needs to be changed. For example, to implement a network with Alice-Bob-Charlie-Dave sequential chain topology, Alice, Bob, Charlie, and Dave need only be configured with channels Ch3, Ch10+ Ch5, Ch8+ Ch6, and Ch7, respectively.
The invention provides an embodiment of a quantum sensing networking method based on a wavelength division multiplexing entangled light source, which comprises the following steps:
firstly, the multi-wavelength entangled photon output of frequency domain comb distribution is realized through the spontaneous nonlinear effect in the optical micro-cavity, the multi-wavelength entangled photon output can be realized by utilizing the spontaneous frequency down-conversion effect in a second-order nonlinear medium micro-cavity or the spontaneous four-wave mixing effect in a third-order nonlinear medium micro-cavity, and the output photons need to have higher spectral brightness, comb distribution in the frequency domain and certain predictability in the time domain;
secondly, constructing a quantum network server through a wavelength division multiplexing system, interconnecting quantum sensors into a network according to quantum sensing network topology, dividing a multi-wavelength entanglement light source into a signal group and an idler frequency group, and distributing each wavelength photon of the signal group and the idler frequency group to quantum sensors at different point positions according to entanglement association relation, so that at least one pair of entangled photons is shared between any two quantum sensors;
and finally, converting the physical quantity to be measured into a quantum state by using a quantum sensor, detecting the quantum state by using a single photon detector, simultaneously realizing all-around acquisition of the whole-network quantum sensing information at a certain specific point according to the measurement result of the entanglement association relation, realizing the on-demand modification of the quantum sensing network topology by changing the channel configuration scheme of the wavelength division multiplexing system, and finally realizing the function of the topology-adjustable distributed quantum sensing network.
The invention provides an embodiment of a quantum sensing networking method based on a wavelength division multiplexing entangled light source, which comprises the steps of generating entangled single photons with equal frequency intervals and pairwise matching by utilizing a nonlinear microcavity spontaneous nonlinear effect, distributing the entangled single photons with different wavelengths to different point positions by utilizing a dense wavelength division multiplexing system in classical optical fiber communication, arranging quantum sensors at the point positions, realizing over-distance sharing of quantum sensing information of the different point positions through interaction of the entangled photons and the quantum sensors, relevance between the entangled photons and single photon detection, and finally constructing a distributed quantum sensing network with variable topology and full network cooperation.
In some embodiments, the entangled single photon implementation is implemented by using a spontaneous frequency down-conversion effect in a second-order nonlinear medium micro-cavity or a spontaneous four-wave mixing effect in a third-order nonlinear medium micro-cavity, where output photons need to have high spectral brightness, comb-shaped distribution in a frequency domain, and certain predictability in a time domain, the nonlinear medium includes but is not limited to lithium niobate, silicon-on-insulator, silicon nitride, and silicon carbide, and the micro-cavity structure includes but is not limited to a micro-ring cavity, a micro-disk cavity, a micro-farpa cavity, and the like. Structural parameters of the microcavity, the free spectral range of the multi-wavelength entangled photons, a noise filtering implementation scheme and the like are not limited.
In some embodiments, the quantum sensor is mainly based on a quantum precision measurement principle, can convert a physical quantity to be measured into a quantum state and detect and analyze the physical quantity through a single photon detector and other devices, and can be interconnected with a quantum communication system, namely quantum state information in the quantum sensor can be transmitted to the other side through the quantum communication system, and has higher precision and sensitivity than a classical sensor; the physical quantity to be detected of the quantum sensor comprises but is not limited to electric field intensity, magnetic field intensity, gravity field intensity and angular acceleration, the quantum carrier comprises but is not limited to photons, cold atoms, ions, Reidberg atoms and the like, and the specific function of the quantum sensor is not limited.
In some embodiments, wavelength division multiplexing designs a network topology as required according to the point location distribution of each quantum sensor, calculates the number relation of quantum state transmission links according to the network topology, combines single photons with entanglement association into the same optical path through a dense wavelength division multiplexing system and distributes the single photons to quantum sensors of corresponding point locations, the quantum sensors of specific point locations separate photons entangled with quantum sensors of different point locations into different optical paths through the wavelength division multiplexing system and detect the photons respectively through a single photon detector, and the whole network quantum sensing information can be obtained by performing time-frequency analysis on detection results.
In some embodiments, network users of the quantum sensing network are quantum sensors, information transmitted by the network is mainly in a quantum state, the quantum sensors at any point in the quantum sensing network can acquire data information of the quantum sensors at other points through single photon detection, and the transmission process of the quantum sensing information is compatible with the security attributes of all quantum communication systems. The specific application, point location arrangement and network topology of the quantum sensing network are not limited.
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 fuses a quantum entanglement distribution network and a quantum sensor represented by a quantum interferometer, and provides a realization method of a topology-adjustable distributed quantum sensing network.
Secondly, the quantum sensing networking method based on the wavelength division multiplexing entangled light source provided by the invention can be compatible with the high-safety information transmission capability of a quantum communication network, and the safety and the reliability of the distributed quantum sensing application are improved.
Finally, the quantum sensing networking method has higher operation efficiency, for a four-user full-interconnection quantum sensing network, at least 12 sets of quantum communication equipment and 4 sets of quantum sensors are needed based on the traditional point-to-point quantum communication networking scheme, only one set of quantum network server, 12 sets of single photon detectors (only 4 sets are needed when a time division multiplexing strategy is used) and 4 sets of quantum sensors are needed, and the advantage is more obvious along with the increase of the scale of the distributed quantum sensing network.
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 quantum sensing networking method based on wavelength division multiplexing entangled light source is realized by a spontaneous frequency down-conversion effect in a second-order nonlinear microcavity or a spontaneous four-wave mixing effect in a third-order nonlinear microcavity, and entangled photons distributed in a frequency domain comb shape and in pairs according to wavelength are output by means of band-pass filtering and resonance enhancement effects of the microcavity; the high-precision sensing of specific point positions and specific physical quantities is realized by taking quanta as media through a quantum precision measurement means; entangled photons with different wavelengths are distributed to different sensing point positions through a wavelength division multiplexing system and are effectively connected with quantum sensors, multi-point position sharing of quantum sensing information is achieved through correlation measurement among the entangled photons, sensing information of other point positions is obtained through entanglement correlation measurement at a certain specific point position, and the function of topology-variable distributed quantum sensing networking is achieved.
2. The quantum sensing networking method based on the wavelength division multiplexing entangled light source of claim 1, wherein the method realizes the output of frequency domain comb-distributed multi-wavelength entangled photons through the spontaneous nonlinear effect in the optical micro-cavity, and is realized by utilizing the spontaneous frequency down-conversion effect in the second-order nonlinear medium micro-cavity or the spontaneous four-wave mixing effect in the third-order nonlinear medium micro-cavity, and the output photons need to have higher spectral brightness, be in comb-distribution in the frequency domain and have certain predictability in the time domain.
3. The quantum sensing networking method based on the wavelength division multiplexing entangled light source of claim 1, wherein the method comprises the steps of constructing a quantum network server through a wavelength division multiplexing system, interconnecting quantum sensors into a network according to a quantum sensing network topology, dividing a multi-wavelength entangled light source into a signal group and an idler group, and distributing each wavelength photon of the signal group and the idler group to different point quantum sensors according to an entanglement association relationship, so that at least one pair of entangled photons is shared between any two quantum sensors.
4. The quantum sensing networking method based on the wavelength division multiplexing entangled light source of claim 1, wherein the method utilizes a quantum sensor to convert a physical quantity to be measured into a quantum state and detects the quantum state through a single photon detector, meanwhile, the omnibearing acquisition of the whole network quantum sensing information is realized at a certain specific point according to the measurement result of the entangled incidence relation, the on-demand modification of the quantum sensing network topology is realized by changing the channel configuration scheme of the wavelength division multiplexing system, and finally, the function of the topology adjustable distributed quantum sensing network is realized.
5. The quantum sensing networking method based on the wavelength division multiplexing entangled light source according to one of claims 1 to 4, characterized in that the method utilizes a nonlinear microcavity spontaneous nonlinear effect to generate entangled single photons with equal frequency and pairwise pairing, utilizes a dense wavelength division multiplexing system in classical optical fiber communication to distribute the entangled single photons with different wavelengths to different points, arranges quantum sensors at the points, and realizes the over-distance sharing of quantum sensing information of the different points through the interaction between the entangled photons and the quantum sensors, the relevance between the entangled photons and the single photon detection, thereby finally constructing a topology-variable and full-network-cooperative distributed quantum sensing network.
6. The quantum sensing networking method based on the wavelength division multiplexing entangled light source as claimed in one of claims 1 to 5, wherein the method is implemented by using a spontaneous frequency down-conversion effect in a second-order nonlinear medium micro-cavity or a spontaneous four-wave mixing effect in a third-order nonlinear medium micro-cavity, and output photons need to have higher spectral brightness, comb-shaped distribution in a frequency domain, and certain predictability in a time domain.
7. The quantum sensing networking method based on the wavelength division multiplexing entangled light source as claimed in one of claims 1 to 6, wherein the quantum sensor converts the physical quantity to be measured into a quantum state and detects and analyzes the quantum state through a single photon detector or other devices based on the quantum precision measurement principle, and the quantum sensor can be interconnected with a quantum communication system.
8. The quantum sensing networking method based on the wavelength division multiplexing entangled light source according to any one of claims 1 to 7, wherein the wavelength division multiplexing designs a network topology according to the point location distribution of each quantum sensor, calculates the number relationship of quantum state transmission links according to the network topology, combines single photons with entanglement association to the same optical path through a dense wavelength division multiplexing system and distributes the single photons to the quantum sensors of corresponding point locations, the specific point location quantum sensor separates photons entangled with different point location quantum sensors to different optical paths through the wavelength division multiplexing system and detects the single photons respectively through a detector, and the whole network quantum sensing information can be obtained by performing time-frequency analysis on the detection result.
9. A system for realizing the wavelength division multiplexing entanglement light source-based quantum sensing networking method of claims 1-8, comprising an optical microcavity, a single photon detector, a plurality of wavelength division multiplexers and a quantum sensor, wherein the multi-wavelength entanglement photon output in comb-shaped distribution of frequency domain is realized by the spontaneous nonlinear effect in the optical microcavity, the multi-wavelength entanglement photon output is realized by the spontaneous frequency down-conversion effect in a second-order nonlinear medium microcavity or the spontaneous four-wave mixing effect in a third-order nonlinear medium microcavity, and the output photons need to have higher spectral brightness, comb-shaped distribution in frequency domain and certain predictability in time domain; constructing a quantum network server through a wavelength division multiplexing system, interconnecting quantum sensors into a network according to a quantum sensing network topology, dividing a multi-wavelength entanglement light source into a signal group and an idler frequency group, and distributing each wavelength photon of the signal group and the idler frequency group to quantum sensors at different point positions according to an entanglement association relation, so that at least one pair of entangled photons is shared between any two quantum sensors; the method comprises the steps of converting physical quantity to be measured into a quantum state by using a quantum sensor, detecting the quantum state by using a single photon detector, realizing all-dimensional acquisition of whole-network quantum sensing information at a certain specific point according to a measurement result of an entanglement association relation, realizing on-demand modification of a quantum sensing network topology by changing a channel configuration scheme of a wavelength division multiplexing system, and finally realizing a topology-adjustable distributed quantum sensing network 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110723887.7A CN113472452A (en) | 2021-06-29 | 2021-06-29 | Quantum sensing networking method based on wavelength division multiplexing entangled light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110723887.7A CN113472452A (en) | 2021-06-29 | 2021-06-29 | Quantum sensing networking method based on wavelength division multiplexing entangled light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113472452A true CN113472452A (en) | 2021-10-01 |
Family
ID=77873457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110723887.7A Pending CN113472452A (en) | 2021-06-29 | 2021-06-29 | Quantum sensing networking method based on wavelength division multiplexing entangled light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113472452A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116170082A (en) * | 2023-04-26 | 2023-05-26 | 军事科学院系统工程研究院网络信息研究所 | Quantum communication method integrating communication time service |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090278046A1 (en) * | 2008-05-07 | 2009-11-12 | Allen Edward H | Sensor systems and methods using entangled quantum particles |
| CN111510287A (en) * | 2020-03-20 | 2020-08-07 | 军事科学院系统工程研究院网络信息研究所 | Quantum communication networking method and system based on multi-wavelength channel aliasing entanglement light source |
| US20210159987A1 (en) * | 2019-11-22 | 2021-05-27 | Arizona Board Of Regents On Behalf Of The University Of Arizona | Entangled, spatially distributed quantum sensor network enhanced by practical quantum repeaters |
-
2021
- 2021-06-29 CN CN202110723887.7A patent/CN113472452A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090278046A1 (en) * | 2008-05-07 | 2009-11-12 | Allen Edward H | Sensor systems and methods using entangled quantum particles |
| US20210159987A1 (en) * | 2019-11-22 | 2021-05-27 | Arizona Board Of Regents On Behalf Of The University Of Arizona | Entangled, spatially distributed quantum sensor network enhanced by practical quantum repeaters |
| CN111510287A (en) * | 2020-03-20 | 2020-08-07 | 军事科学院系统工程研究院网络信息研究所 | Quantum communication networking method and system based on multi-wavelength channel aliasing entanglement light source |
Non-Patent Citations (2)
| Title |
|---|
| SASAKI, M (SASAKI, M.) 1: "NOVEL PHOTON DETECTION TECHNOLOGIES FOR QUANTUM COMMUNICATIONS", 《ADVANCED PHOTON COUNTING TECHNIQUES VI》 * |
| 郭光灿: "量子信息技术研究现状与未来", 《中国科学:信息科学》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116170082A (en) * | 2023-04-26 | 2023-05-26 | 军事科学院系统工程研究院网络信息研究所 | Quantum communication method integrating communication time service |
| CN116170082B (en) * | 2023-04-26 | 2023-08-08 | 中国人民解放军军事科学院系统工程研究院 | Quantum communication method integrating communication time service |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Brecht et al. | Photon temporal modes: a complete framework for quantum information science | |
| Lingaraju et al. | Adaptive bandwidth management for entanglement distribution in quantum networks | |
| Mazeas et al. | High-quality photonic entanglement for wavelength-multiplexed quantum communication based on a silicon chip | |
| Thew et al. | Experimental investigation of the robustness of partially entangled qubits over 11 km | |
| Zmuidzinas | Thermal noise and correlations in photon detection | |
| Appas et al. | Flexible entanglement-distribution network with an AlGaAs chip for secure communications | |
| CN111510225B (en) | Quantum communication networking method and system based on multi-wavelength entangled light source | |
| Vergyris et al. | Fully guided-wave photon pair source for quantum applications | |
| CN105049195B (en) | Multi-user's QKD network systems based on Sagnac rings | |
| CN105091776B (en) | The optical-fiber laser static strain beat frequency demodulating system modulated based on single-side belt frequency sweep | |
| Anwer et al. | Experimental characterization of unsharp qubit observables and sequential measurement incompatibility via quantum random access codes | |
| CN113472454A (en) | Quantum sensing networking method based on channel aliasing entanglement light source | |
| US10205592B2 (en) | Physical layer key distribution for long distance repeated networks using random environmental instability | |
| Zhu et al. | Toward a reconfigurable quantum network enabled by a broadband entangled source | |
| Sun et al. | Long-distance frequency-division interferometer for communication and quantum cryptography | |
| Valivarthi et al. | Plug-and-play continuous-variable quantum key distribution for metropolitan networks | |
| CN111510287B (en) | Quantum communication networking method and system based on multi-wavelength channel aliasing entanglement light source | |
| CN106972893B (en) | A kind of coherent field dense coding communication device and method | |
| Chung et al. | Illinois Express Quantum Network (IEQNET): metropolitan-scale experimental quantum networking over deployed optical fiber | |
| da Silva et al. | Spectral characterization of weak coherent state sources based on two-photon interference | |
| Price et al. | High-speed quantum key distribution with wavelength-division multiplexing on integrated photonic devices | |
| Wang et al. | Optical frequency comb-based multichannel parallel continuous-variable quantum key distribution | |
| CN113472452A (en) | Quantum sensing networking method based on wavelength division multiplexing entangled light source | |
| Nazemosadat et al. | Heterogeneous multicore fiber-based microwave frequency measurement | |
| CN101031788B (en) | Method, device and program for measuring wavelength dispersion of optical waveguide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20211001 |
|
| WD01 | Invention patent application deemed withdrawn after publication |