249 results about "Quantum network" patented technology

The invention discloses a multi-node secure communication method and system based on quantum key distribution, and the method comprises the steps: evaluating multi-dimensional parameters of a quantum channel, dynamically updating a node reputation value, constructing a four-dimensional topological graph database, and generating candidate routing paths based on a Monte Carlo tree search algorithm; a state-action space is constructed by further combining reinforcement learning, and path selection is optimized by using a dual Q network and a priority experience playback mechanism; through multi-dimensional channel assessment and node reputation value dynamic updating, the defects of a traditional quantum network static routing strategy are overcome, the communication safety and efficiency are improved, and low-delay and high-reliability key distribution of a complex quantum network is supported.

The invention provides an unmanned aerial vehicle quantum network entanglement routing method with guaranteed fidelity. The method comprises the following steps: step 1, establishing entanglement connection between adjacent quantum nodes; step 2, establishing a path selection method with end-to-end fidelity as measurement; step 3, an entanglement purification method of hop-by-hop multiple attempts; and step 4, an evaluation method based on network throughput. The method is used for solving the problem of lack of unmanned aerial vehicle quantum entanglement network routing protocols, an entanglement purification scheme for guaranteeing the fidelity is given, and the end-to-end fidelity is effectively guaranteed. According to the method, the entanglement switching path taking the end-to-end fidelity as the routing metric is selected, so that the network throughput is further enhanced, and the quantum nodes of the unmanned aerial vehicle are protected.

The invention provides a resource scheduling method for concurrent competition requests in a quantum network. The method comprises the following steps: establishing a routing path of a single request; calculating a congestion factor of each request routing path; establishing a demand-oriented multi-request purification scheduling method; and establishing a network throughput evaluation method. According to the method, a new demand-oriented purification mode is provided, and excessive consumption of bottleneck link resources in the network can be avoided while the fidelity constraint is met. More network resources are released by designing congestion factors to determine the purification order of each request. Compared with a traditional resource allocation scheme, the demand-oriented resource scheduling DRS method provided by the invention can realize higher network throughput under a similar resource conversion rate.

A quantum element (QE) at a network node stores a first quantum state constituent (QSC) of an entangled quantum state characterized by a non-factorable quantum relationship among QSCs comprising the first QSC and a second QSC stored at another QE at another network node. Managing one or more quantum error management (QEM) operations includes: (1) providing a schedule for the QEM operations that is based at least in part on at least a portion of a time over which the first QSC is stored at the first QE and an estimated fidelity of the entangled quantum state after at least one of the QEM operations, or (2) providing a type of one or more QEM operations selected from two or more different types based at least in part on a number of resource quantum elements available at the first node after the first QSC is stored at the first QE.

A method for executing quantum network applications comprises receiving a quantum code block associated with a first quantum network application by an operating system of a first quantum network node, the quantum code block comprising quantum operations, the quantum operations including local quantum operations not related to entanglement generation and at least an entanglement generation operation for entanglement generation between the first quantum network node and a second quantum network node; executing at least part of the quantum operations on the quantum computing system via a first subsystem of the operating system, wherein if a quantum operation is relates to an entanglement generation operation, sending the entanglement generation operation to a second subsystem of the operating system, the second subsystem preparing execution of the entanglement generation operation as a background process of the operating system, while the first subsystem continues executing local quantum operations.

Quantum systems and techniques are described to generate fault tolerant cluster states for use in quantum computation, quantum networking, and other applications. The systems and techniques include initializing states in first qubits and generating initial resource states by performing first Pauli product measurements on sets of X-type and / or Z-type qubits of the first qubits, the initial resource states comprising qubit cluster states comprising at least three qubits. The final cluster state may then be generated by fusing two or more initial resource states, the fusing comprising performing second Pauli product measurements between qubits of two or more of the initial resource states.

The invention relates to a quantum network data transmission method and system for multi-quantum-bit communication, and belongs to the technical field of quantum communication and network. According to the method, an E2E entanglement generation mechanism and a specific noise interference mechanism of multi-quit communication in the quantum network are established, a multi-quit entanglement quality evaluation model, an E2E communication time delay model and a request data transmission model are modeled, and a centralized and distributed collaborative optimization network response model is designed. According to the system, a proposed multi-quit entanglement communication framework is trained and deployed on quantum network models of different scales, the system is used for processing transmission requirements of heterogeneous requests in batches, and stable and efficient data transmission service can be provided for concurrent response of batch requests in a large-scale quantum network. According to the invention, resource configuration and transmission quantification can be carried out on entanglement establishment and entanglement transmission, the response time delay of a large-scale quantum network to a multi-request transmission demand is reduced, and quantum resources are reasonably used.

The invention discloses a quantum network path selection and resource allocation method and system for realizing high throughput, and the method comprises the steps: initializing global variables and network parameters at least comprising a network topology structure, a request number and the maximum capacity of edges through building a quantum network model; setting the initial capacity of each edge, adjusting the capacity according to the fidelity of the edge, and removing the edge of which the fidelity is less than 0.5; designing a path selection algorithm, and selecting an optimal path by using the characteristics of the quantum state; constructing a resource allocation strategy based on quantum entanglement and quantum parallelism, and dynamically allocating network resources; and verifying the validity of the path selection and resource allocation method through the quantum network simulator. The resource allocation sequence is optimized, redundant operation in the resource allocation process is reduced, and therefore consumption of computing resources is reduced.

The invention discloses a multi-polarization-state solid-state quantum storage device which comprises a laser generation module, a pump light modulation module, a storage light modulation module and a quantum storage module. The invention further discloses a multi-polarization-state solid-state quantum storage method which is realized based on the multi-polarization-state solid-state quantum storage device. The invention discloses a multi-polarization-state solid-state quantum storage device and method, and the device achieves the storage of multi-polarization-state signal light through the storage of signal light in a specified polarization state through a quantum storage module, and carrying out the polarization state conversion of signal light in a non-specified polarization state, and then carrying out the storage of the signal light. The method is applied to quantum parallel computing and quantum network scale application.

The invention provides a reinforcement learning method based on a quantum classical hybrid architecture, electronic equipment and a non-instantaneous computer readable storage medium. The method comprises the following steps: determining a reinforcement learning environment; according to the environment, constructing a quantum network and a classic network to form an artificial intelligence model with a quantum and classic hybrid architecture; and training the artificial intelligence model to obtain a model after reinforcement learning.

The embodiment of the invention provides a bottleneck link processing method and device, electronic equipment and a computer readable storage medium, and relates to the technical field of quantum networks, and the method comprises the steps: carrying out the graph initialization of a quantum key distribution network, obtaining a connected graph of the quantum key distribution network, and generating a first classification set based on the classification of nodes in the connected graph; when the first classification set is not the null set, determining a to-be-detected classification from the first classification set, and determining a first node set and a second node set from the connected graph based on the to-be-detected classification; determining a total key demand amount between the first node set and the second node set, and determining a cut set between the first node set and the second node set and a key generation rate of the cut set; and when the key generation rate is smaller than the total key demand, determining the quantum link corresponding to the edge in the cut set as a bottleneck link. According to the embodiment of the invention, the bottleneck link in the quantum key distribution network can be effectively identified.

Aspects of the subject disclosure may include, for example, a device with a processing system including a processor; and a memory that stores executable instructions that, when executed by the processing system, facilitates performance of operations, including: automatically detecting an intrusion of a secure communication channel that provides communication services to a node in a network; implementing a generative artificial intelligence that finds an alternative secure communication channel; and migrating the communication services to the alternative secure communication channel responsive to finding the alternative secure communication channel. Other embodiments are disclosed.

The utility model discloses a quantum key distribution system based on 5G communication. The quantum key distribution system comprises 5G communication equipment, a cloud server and a key management module, wherein the 5G communication equipment is connected with the cloud server through a 5G channel, and the cloud server is connected with the key management module through the 5G channel; the 5G communication equipment carries a quantum chip, and the quantum chip is connected with the key management module through a quantum channel. The utility model discloses a quantum key distribution system based on 5G communication, which is characterized in that a quantum chip is carried in 5G communication equipment, and 5G communication and quantum communication are closely combined, so that the communication is more convenient and safer; moreover, through a highly integrated quantum chip technology, the system can be onboard to 5G communication equipment such as a smart phone, thereby greatly widening the application scene of quantum key distribution, and facilitating the promotion of the application of QKD in a 5G quantum network and commercial passwords.

A system and method for providing quantum entanglement using a hybrid space-fiber quantum network are described. The hybrid space-fiber quantum network includes a communications hub located proximate to an optical ground station and also includes an aerial entangled particle source, such as an entangled photon source attached to a satellite, drone, aircraft, etc. An atmospheric or free-space channel is used to distribute quantum entanglement between optical ground stations that are separated by geographic distances, via the aerial entangled particle source. Also, fiber optic links are connected to the communications hub located proximate to the optical ground station. The communications hub includes optical switches that enable any of the fiber optic links connected to the communications hub to receive or send distributed quantum entanglement to a remotely located recipient endpoint via the atmospheric or free-space channel.

The invention relates to an entanglement request scheduling method based on a quantum network. Comprising the following steps: firstly, establishing a routing path selection method of a single remote request, and selecting a routing path with the highest end-to-end fidelity for each request; establishing a two-stage request scheduling strategy; and finally establishing a comprehensive evaluation mechanism based on the network throughput, the fairness index and the request service rate. Through the setting, in a quantum network purification operation scene, the end-to-end fidelity is used as a key index of request priority ranking, a refined fidelity evaluation model is established, resource requirements and application values of different entanglement requests are accurately quantified, high-fidelity requests are preferentially scheduled to enter a resource allocation queue, and the resource allocation efficiency is improved. Meanwhile, the resource loss characteristics in the purification process are dynamically adapted, dual optimal configuration of entangled resources in the time dimension and the space dimension is achieved, the service quality of high-value requests is guaranteed, resource idleness and waste are avoided, and the overall resource utilization rate is remarkably increased.

The invention discloses a double-field quantum key distribution system. The double-field quantum key distribution system comprises a Charlie end, an Alice end and a Bob end, the invention also discloses a double-field quantum key distribution method which is realized based on the double-field quantum key distribution system. The invention discloses a double-field quantum key distribution system and method, and the method comprises the steps: carrying out the interference of uncoded signal light transmitted and returned by an Alice end and a Bob end at a Charlie end, and feeding back a phase drift distance according to an interference result to compensate the phase drift of the coded signal light during the transmission in an optical fiber, thereby achieving the stable phase, and achieving the high-precision transmission of the coded signal light. The method can adapt to an operation environment with dramatic phase change in long-distance transmission, and the stability and the high efficiency of a quantum network and a transmission link are improved.

In a general aspect, a photonic quantum network is disclosed. In some implementations, microwave modes and optical modes are generated on first and second quantum processing units (QPUs) by operation of a first transducer device of the first QPU and a second transducer device of the second QPU. The microwave modes are transmitted within the first and second QPUs from the first and second transducer devices to respective first and second qubit devices. The optical modes are transmitted from the first and second QPUs to an interferometer device. By operation of the interferometer device, output signals are generated on respective output channels based on the optical modes from the first and second QPUs. Based on the output signals detected by operation of photodetector devices coupled to the respective output channels, quantum entanglement transferred to the first and second qubit devices by the microwave modes is identified.

The embodiment of the invention provides a quantum network data encryption method, system and device based on a cryptographic algorithm, which are applied to a network management center, and the method comprises the following steps: carrying out session key negotiation with a proxy server to obtain a session key; the quantum network data comprises a data plaintext and a data ciphertext, and the data ciphertext is obtained by encrypting the data plaintext through the session key, so that the proxy server verifies the data plaintext through the data ciphertext, and after the data plaintext passes verification, the quantum network data is sent to the proxy server; and the quantum network equipment is controlled according to the control instruction indicated by the data plaintext, so that the security of data interaction among the network management center, the proxy server and the quantum network equipment can be protected through an encryption technology in the quantum network.

The invention discloses a quantum dot-based multi-axis electric field regulation entangled light source, which adopts a p-i-n diode structure, and sequentially comprises a GaAs layer, an n-type doped layer, an n-type doped layer, an n-type doped layer, an n-type doped layer, an n-type doped layer, an n-type doped layer, an n-type doped layer and An Al < 0.15 > Ga < 0.85 > As layer and an Al < 0.33 > Ga < 0.67 > As layer are sequentially arranged above the n-type doped layer and jointly serve as a tunnel potential barrier to isolate the quantum dots from the n-type doped layer; the GaAs quantum dot layer is used for growing GaAs quantum dots in the Al < 0.33 > Ga < 0.67 > As layer by adopting a liquid drop etching method; an Al < 0.33 > Ga < 0.67 > As layer covers the quantum dots to serve as a blocking potential barrier, and carrier leakage is inhibited; and the top is a p-type doped layer. The wavelength-adjustable quantum dot entangled light source with high entanglement fidelity is realized, and the requirement of a quantum repeater in a quantum network can be met.

Quantum network devices, systems, and methods are provided to enable long-distance transmission of quantum bits (qubits) for applications such as Quantum Key Distribution (QKD), entanglement distribution, and other quantum communication applications. Such systems and methods provide for separately storing first, second, third, and fourth photons, wherein the first and second photons and the third and fourth photons are respective first and second entangled photon pairs, triggering a synchronized retrieval of the stored first, second, third, and fourth photons such that the first photon is propagated to a first node, the second and third photons are propagated to a second node, and the fourth photon is propagated to a third node, and creating a new entangled pair comprising the first and fourth photons at the first and third nodes to transmit quantum information.

The invention discloses a foreign language teaching effect evaluation method and system based on artificial intelligence. The method comprises the steps of data acquisition, voice feature extraction, multi-modal fusion evaluation modeling and teaching effect evaluation. The invention relates to the technical field of teaching effect intelligent evaluation, in particular to a foreign language teaching effect evaluation method and system based on artificial intelligence. According to the scheme, a pronunciation definition composite index is constructed through formant difference analysis, the acoustic semantic coupling degree is calculated, and the phoneme transfer stability is evaluated; the definition, the accuracy and the continuity of the voice can be accurately quantified in a multi-noise environment; according to the scheme, modal attention is introduced, full-interconnection cross-modal cross attention is utilized to realize multi-modal information bidirectional interaction, a complementary gating mechanism is innovatively introduced to adaptively adjust a modal fusion proportion, a light quantum network is combined to generate a local score, a meta-decision network dynamically distributes weight, and finally end-to-end optimization is carried out through a differential weighting strategy. And teaching effect evaluation of fineness and accuracy is realized.

The invention discloses a multi-modal medical feature fusion and classification method and system based on quantum enhancement, and belongs to the field of quantum computing and medical intersections, and the method comprises the following steps: S1, obtaining multi-modal medical data of a target patient; s2, preprocessing the medical data of each modal; s3, extracting features of the preprocessed modal medical data, and performing collaborative alignment; s4, performing multi-modal feature fusion based on a quantum self-attention mechanism; and S5, constructing a task specific prediction head for different tasks based on the fused features, and obtaining multi-task multi-label output. According to the method, the robustness of information of different scales is improved through intra-modal global-local dual-channel feature extraction, the feature utilization problem in a modal missing scene is solved through collaborative feature and special feature decomposition, and nonlinear feature fusion is realized in a high-dimensional heterogeneous space by using a quantum network.

The invention relates to the technical field of quantum computing, and discloses a classification method and device based on a quantum SNN network, a medium and equipment. The method comprises the following steps: acquiring a normalized vector of to-be-classified data; performing quantum state representation on the normalized vector by adopting a plurality of quantum bits to obtain a quantum initial state; parameterizing the quantum initial state through a network, and performing quantum evolution processing on the quantum initial state by adopting the network to obtain a quantum evolution processing result; the quantum SNN network comprises a plurality of quantum SNN neurons represented by quantum relaxation gates; the first quantum relaxation gate receives a quantum evolution processing result, and the last quantum relaxation gate outputs a quantum end state; and obtaining an output probability value according to the quantum end state of the SNN neuron, and obtaining a classification result of the to-be-classified data according to the output probability value. According to the invention, the calculation complexity can be reduced, and the calculation efficiency of the SNN neural network can be improved.

The invention relates to the technical field of quantum networks and machine vision, in particular to a quantum network redundancy control training and image classification method and system based on a mutual information mechanism. In the training process, a classical neural network is optimized by adopting the loss LCE of an error between a measurement model label and a real label, and a quantum parameter line of the quantum convolutional neural network is updated by adopting parameter derivation; until the loss function Loss of the classification model is converged; the loss function Loss is composed of mutual information loss LQMI and LCE. According to the quantum network redundancy control training method based on the mutual information mechanism, mutual information loss and a regularization coefficient are introduced, the incidence relation between quantum states is dynamically measured, redundant information is effectively restrained, extraction of key features is enhanced, and the classification task performance is further improved. According to the method, the defect that the potential of the quantum and classical network hybrid architecture cannot be fully mined in the prior art is overcome.

The embodiment of the invention provides a quantum network deployment method and device, electronic equipment and a computer readable storage medium, and relates to the technical field of quantum communication. According to the method, the minimum number of target quantum communication nodes required for covering a target area and the position of each target quantum communication node are determined based on the coverage range of the quantum communication nodes, and then the target quantum link topology between the target quantum communication nodes is determined based on the cost of the quantum link by taking the minimum total cost as the target. According to the embodiment of the invention, the number of quantum communication nodes and quantum links is reduced under the condition that the target area is fully covered, the full-cycle cost of hardware equipment purchase, optical fiber laying, power supply, operation and maintenance management and the like is directly reduced, and the method is particularly suitable for deployment of a large-scale quantum key distribution network.

The invention provides an ISP network abnormal state automatic detection method based on a deep learning algorithm, and the method comprises the steps: collecting multi-dimensional data of an ISP network, extracting time sequence features and topological structure features from the multi-dimensional data, splicing the time sequence features and topological structure features into a fusion feature vector, inputting the fusion feature vector into an ISP network state abnormality monitoring model based on an LSTM-GNN-VAE hybrid model, and carrying out the automatic detection of the abnormal state of the ISP network in an encoder. The LSTM sub-network is used for processing the time sequence characteristic data to obtain a time sequence coding vector, the GNN sub-network is used for processing the topological structure characteristics to obtain a topological coding vector, the time sequence coding vector and the topological coding vector are spliced to obtain a fusion vector, the fusion vector is mapped to a potential space, and a mean value and a variance of potential distribution are output; the decoder generates potential vectors through a re-parameterization technique according to the mean value and variance of the potential distribution, maps the potential vectors back to an original feature space, and reconstructs a comprehensive feature vector. Through targeted processing of the multi-dimensional data, the model is optimized in combination with a plurality of set optimization strategies, and the accuracy of ISP network state anomaly detection is effectively improved.

Systems and methods are disclosed for making a quantum network node. A plurality of scoring function F values are calculated for an array of at least two photonic crystal cavity unit cells, each having a lattice constant α and a hole having a length Hx and a width Hy. A value of α, a value of Hx, and a value of Hy are selected for which a scoring function value is at a maximum. A waveguide region and the array of at least two photonic crystal cavity unit cells based on the selected values are formed on a substrate. At least one ion between a first photonic crystal cavity unit cell and a second photonic crystal cavity unit cell are implanted and annealed into a quantum defect. A coplanar microwave waveguide is formed on the substrate in proximity to the array of at least two photonic crystal cavity unit cells.

A system for quantum-enhanced behavioral analysis and secure database operations includes an ACAARY Database configured to store and process quantum-verified data under multi-tiered access control; an AR Quantum Cyber-Micro Expressions System configured to analyze involuntary behavioral patterns in digital communications via computational analysis of user interaction data; AR Quantum Sequence Triplications with Quantum Operations comprising three-qubit verification circuits implemented on superconducting quantum processors that perform parallel artificial-qubit processing to achieve unbiased quantum supremacy; an AR Quantum Parallel Data Algorithm Structure and Method Specialized Encrypted Algorithmic Quantum Procedures configured to execute simultaneous perpendicular encryption processing with real-time transaction verification across multiple channels; an AR Helmsmen Quantum Transportation Management System with integrated digital licensing and frequency-based quantum routing protocols; and an AR Thermodynamics Devices System configured to perform thermal bonding and division operations while maintaining different temperatures within defined containment areas for material modification.

The invention discloses a source device independent quantum key distribution method, device and system and a network thereof, and belongs to the technical field of quantum key distribution. In order to solve the problem that an existing quantum key distribution protocol depends on a source end security hypothesis and is difficult to defend unknown source side attacks, the invention provides a source equipment-independent quantum key distribution protocol. Through the physical characteristics of the non-classical quantum light source and a pairing method after measurement, the security hypothesis of source end equipment is removed, known and unknown source side attacks can be effectively resisted, and the quantum advantages in the aspects of security and performance expression compared with a classical laser source are realized. The invention further provides a method for directly expanding the point-to-point protocol to the multi-user quantum key distribution network, compared with an existing quantum network based on an entangled photon source, the complexity of an experiment system and the requirement for equipment are reduced, and the method is suitable for long-distance and high-safety quantum communication and quantum network deployment.

Quantum networks having topologies defined by connected entanglement graphs which comprise plural vertices connected by plural edges are disclosed. The entanglement graphs are not all-to-all connected. The entanglement graphs may be non-planar graphs. At least some of the vertices are connected to three or more of the edges. Nodes of the quantum network correspond to vertices of the entanglement graph. Entanglement means are operable to directly entangle quantum systems in those pairs of the nodes which respectively correspond to vertices of the entanglement graph that are connected by an edge of the entanglement graph. Optical paths used by the entanglement means may include optical paths provided by braids or knots that are configured to interface to one or more units which include the nodes.