2307results about "Photonic quantum communication" patented technology

The invention provides a coast defense monitoring system based on unmanned aerial vehicle group collaboration and an application method thereof, and relates to the technical field of coast defense monitoring, and the coast defense monitoring system integrates air unmanned aerial vehicles, water surface unmanned ships and underwater unmanned ships, constructs a four-dimensional collaborative monitoring network, and combines a frequency domain resonance superposition technology and real-time analysis of marine environment variables. A dynamic three-dimensional environment model is generated, threat prediction of a time dimension is realized, multi-source sensor data can be fused in real time, a complete space contour of a target is formed, threat distribution in several hours in the future is predicted through environment change, for example, unmanned aerial vehicle deployment is adjusted in advance to cope with illegal border crossing behaviors in storms, and the risk of threatening is reduced. Quantum entanglement communication and acousto-optic hybrid communication ensure the stability and security of data transmission, and support millisecond response. According to the effect, the real-time performance and foresight of coast defense monitoring are remarkably improved, so that the system not only can quickly cope with current threats, but also can actively prevent potential risks.

The invention relates to the technical field of computer storage, and discloses a computer distributed storage encryption system. According to the invention, through quantum key segmentation and geographical binding technologies, it is ensured that a complete key cannot be reconstructed due to leakage of a single node; the dynamic topology sensing module monitors node states in real time and quickly responds to side channel attacks through a hardware fingerprint fusing mechanism; the space-time folding encryption module adopts chaotic fractal cutting and PUF noise injection, so that the same data block generates differential ciphertexts at different nodes, and global data cannot be threatened by cracking a single node; the implicit disaster recovery channel realizes anti-quantum hidden transmission and key self-repairing through photon orbital angular momentum modulation and quantum trap state embedding; the improved NTRU algorithm significantly improves the encryption efficiency and reduces the decryption error rate through chaotic parameter injection and FPGA acceleration. The system has high security, quantum computing resistance and dynamic environment adaptability, and solves the problems of key stiffness, fragmentation redundancy, security contradiction and the like in traditional distributed storage encryption.

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 discloses a satellite-ground cooperative wide-area real-time communication system and a communication method thereof, and relates to the technical field of satellite-ground cooperative communication, and the communication method comprises the following steps: deploying a satellite-ground cooperative network, configuring initial link parameters and node identifiers of a satellite and a ground station, and establishing a link state table; the link state data in the link state table are fed back to the control end, and the control end calculates a link comprehensive score based on the link state data; according to the real-time optical communication channel state and the interference condition, the light beam direction is dynamically adjusted, communication channel reconstruction is carried out, and the optimal optical communication channel is selected; transmitting the encoded data stream to a receiving end through the optimal optical communication channel, and decoding the encoded data stream by the receiving end through a decoder to generate link quality data; and updating the link state table according to the link quality data. Based on the real-time optical communication channel state and the interference condition, the light beam direction is dynamically adjusted, the communication channel is reconstructed, the optimal transmission path of the channel is ensured, and therefore the signal transmission quality and the bandwidth utilization rate are improved.

The invention discloses a remote proving method for a trusted data space, which relates to the technical field of computer and data security, and comprises the following steps: initializing a trusted environment and generating a dynamic identity key for a heterogeneous terminal containing a CPU (Central Processing Unit), a GPU (Graphic Processing Unit) and an FPGA (Field Programmable Gate Array) based on a hardware security module and a physical unclonable function, and generating a challenge value by a verifier by using a quantum random number; the method comprises the following steps of: firstly, transmitting to a proving party through quantum encryption and a neuromorphic photonic network, constructing proving by the proving party by adopting a tensor decomposition zero-knowledge proving protocol, finishing multi-stage verification on a verification party in combination with a space-time cause and effect graph and quantum signature aggregation, and finally realizing dynamic trust evaluation and adaptive strategy adjustment through a quantum Bayesian network, reinforcement learning and biological feedback. According to the method, the remote attestation performance of the trusted data space is improved, dynamic trust evaluation is realized by means of the quantum Bayesian network and biological feedback, attacks are effectively resisted, real-time requirements are met, trust is accurately evaluated, and the development of the trusted data space is promoted.

The invention discloses a multi-mode optical signal transmission method and device, electronic equipment and a storage medium, and relates to the technical field of computers.The transmitted data stream is divided into a control signal and a data signal, the control signal is a visible light wave band, the data signal is an infrared wave band, and the control signal and the data signal are combined to a single multi-core optical fiber through a combiner; the optical network controller allocates subcarrier resources as required according to the change of network flow in a spectrum dynamic allocation mode to perform data transmission, so that the subcarrier resource allocation adapted to the change of network flow improves the dynamic adaptability, and the allocation of the subcarrier resources as required improves the equipment cooperation efficiency, and in the data transmission process, the data transmission efficiency is improved. Clock synchronization and signal encryption are realized through a quantum key distribution mode, and the security is improved.

The invention relates to an unmanned aerial vehicle detection countering method, which comprises the following steps of: deploying a multi-dimensional sensing network to carry out full-band instantaneous scanning, synchronously acquiring noise characteristics of radio signals, material characteristics of a terahertz wave band and Doppler effect characteristics, mapping to a virtual twinborn body, reconstructing physical parameters, a communication protocol and a behavior mode of a target unmanned aerial vehicle, performing depth comparison by combining a disguise sample library generated by the antagonism generation network, and generating a holographic target file containing a three-dimensional motion vector, an energy feature and a potential threat intention; a target quantum encryption communication link is interfered through a quantum entanglement signal, a controllable plasma cloud cluster is generated, navigation and image transmission signals of the controllable plasma cloud cluster are selectively attenuated, the controllability of the target is judged, and an uncontrollable target is repelled through coded sound waves; and sending a control instruction containing a biological heuristic obstacle avoidance algorithm in stages, and guiding the control instruction to an intelligent recovery cabin. According to the invention, accurate detection, intelligent identification, safe countering and reliable takeover of the unmanned aerial vehicle are realized, and the airspace safety guarantee capability is improved.

The invention discloses a 5.5 G network encryption communication method based on quantum key distribution, and relates to the technical field of quantum encryption communication, a channel characteristic data set, an equipment parameter data set and an environment parameter data set are collected in advance, a channel prediction model is constructed based on the channel characteristic data set and the environment parameter data set, and the channel prediction model is constructed based on the equipment parameter data set and the environment parameter data set. And constructing an equipment optimization model based on the equipment parameter data set and the prediction result of the channel prediction model, constructing an error rate optimization model for outputting a key management strategy based on the prediction result of the channel prediction model and the optimization result of the equipment optimization model, and sending the optimized key management strategy. According to the method, a key management strategy is established, quantum key distribution is executed according to the key management strategy, changes of channel parameters and equipment parameters are monitored in real time through a 5.5 G network, quantum signal generation and transmission strategies are adjusted by using a genetic algorithm based on the changes of the channel parameters and the equipment parameters monitored in real time, and the robustness and flexibility of 5.5 G network communication are enhanced.

Optical system for the generation of entangled photons comprising a light source configured to generate a first beam of coherent light, at least one first balanced beam displacement, BBD, element, a nonlinear optical element comprising a nonlinear optical material, and at least one second BBD element, wherein the at least one first BBD element is configured to split the source beam into at least a first pump beam and a second pump beam upstream of the nonlinear optical element, wherein the nonlinear optical material is configured to interact via spontaneous parametric down-conversion, SPDC, with the first pump beam and the second pump beam to generate photon pairs, each photon pair comprising a signal photon and an idler photon, and wherein the at least one second BBD element is configured to combine the trajectories of the generated photon pairs downstream of the nonlinear optical element.

The invention discloses a switch secure communication encryption method based on quantum key distribution. The method comprises the following steps: a service party submits a'security-delay-bandwidth 'intention to a zero-trust brain through a quantum policy intention description language; evaluating the real-time quality, key margin and topology accessibility of an optical fiber quantum channel, a classical ultra-high-speed channel and a radio frequency space channel according to intention requirements; triggering a QKD transmitting end and a receiving end to perform quantum state transmission of polarization and OAM coding along the optimal quantum path, completing basis vector comparison, error code verification and privacy amplification, generating a root quantum key, and injecting the root quantum key into an on-chip quantum memory; when a data packet arrives at a switch port, the assembly line takes out Kroot from the first-level key pool, and derives a one-time session key through the HMAC-SHA3; continuously monitoring a quantum channel bit error rate, a key pool margin and an AI abnormal score; and the transmitting and receiving parties synchronously confirm and destroy the session key, write all key life cycle events into a quantum invariant account book, and realize second-level auditing evidence obtaining through block chain hash anchoring.

An optical communication receiver system for a mobile platform includes: a surface having an entrance aperture for entry of an optical communication signal from a remote source; an optical receiver to receive the optical communication signal through the entrance aperture; a reflective layer over at least a portion of the surface to at least partially reflect an alignment beam that is substantially coincident with the optical communication signal; a camera positioned to detect the reflected alignment beam; a processor to determine alignment information about the alignment beam relative to the entrance aperture based on the reflected alignment beam detected by the camera; and a transmitter to transmit the alignment information to the remote source to enable the remote source to center the optical communication signal in the entrance aperture.

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.

The invention provides a quantum communication system, method and device, and is applied to the technical field of quantum communication. The quantum communication system comprises a first device and a second device which are connected through an optical fiber link, the first device generates an initial optical signal and a local oscillation optical signal, sends the initial optical signal to the second device, receives a quantum optical signal from the second device, and sends the quantum optical signal to the second device. Performing coherent detection and demodulation based on the local oscillator optical signal and the quantum optical signal to generate a quantum key, monitoring a preset parameter in the coherent detection and demodulation process, and adjusting the local oscillator optical signal to enable the preset parameter to reach a preset value; and the second equipment receives the initial optical signal, performs quantum state modulation on the initial optical signal to form a quantum optical signal, and sends the quantum optical signal to the first equipment. According to the embodiment of the invention, the deployment cost of the quantum communication system can be reduced, and the optimization of equipment power consumption and detection efficiency in the key distribution process is realized.

An optical communication system comprises a transmitter optically coupled to a single-mode optical channel, and a multimode optical fibre configured to support transmission of a plurality of guided modes. The plurality of guided modes comprises a target mode. The system further comprises an optical mode converter configured to optically couple the mode of the channel to the target mode of the multimode fibre by gradually changing a transverse profile of propagating light received from the channel to match a transverse profile of the target mode of the multimode fibre.

The invention provides a quantum key generation method and device, equipment and a medium, and relates to the technical field of quantum communication. The method comprises the following steps: negotiating with a first communication party through a classical channel, and determining a coding strategy; receiving a photon sequence sent by the first communication party, randomly selecting a base vector to measure photons of the order recorded in the coding strategy to obtain a first measurement result, and storing the photons which are not measured; after the first communication party publishes the measurement base vector of the photon sequence and the bit string corresponding to the photon of the order recorded in the coding strategy, the bit error rate is calculated based on the bit string and the first measurement result; under the condition that the bit error rate is smaller than or equal to a preset threshold value, measuring unmeasured photons through a base vector published by the first communication party to obtain a second measurement result; a quantum key is generated based on the second measurement. According to the embodiment of the invention, the number of keys generated in unit time can be increased, and the code rate of the quantum key is improved.

The present disclosure relates to a quantum communication system. Particularly, the present disclosure relates to a device and a method for performing two-step quantum secure direct communication (QSDC) with a reduced complexity without measuring a quantum memory and a bell state of a receiver in a quantum communication system.

The invention discloses an oil storage tank oil-water interface measurement system and method and a storage medium, and relates to the technical field of oil-water interface measurement, and the system comprises a data acquisition module, a data processing module, a decision support module and a data security module. According to the oil-water interface measuring system and method for the oil storage tank and the storage medium, a three-dimensional sensing network (distributed sensor network) is constructed by adopting a pressure sensor array and phased array ultrasonic scanning technology and combining dielectric property detection of a microwave dielectric constant sensor; the pressure, the dielectric constant, the liquid level and the vibration data in the tank body are obtained, basic data are provided for subsequent processing, the comprehensiveness of data obtaining can be improved through the sensing network, the pressure data are dynamically calibrated through Takagi-Sugeno fuzzy logic, the influence of temperature drift is effectively eliminated, and the accuracy of data obtaining is improved. The ultrasonic signals are subjected to feature enhancement through the generative adversarial network, and the emulsion layer boundary is accurately recognized.

An entangled quantum state receiver includes an optical detector that generates an electrical signal having a signal characteristic in response to detection of a single photon. A first electrical circuit generating an electrical signal having a predetermined duration when the signal characteristic is present at the input. A clock generates a clock waveform with a period. A second electrical circuit generates a state value when the electrical signal has the predetermined duration during a cycle of the clock waveform. A processor is configured to determine received entangled state information from the state value and configured to adjust the clock period based on a background photon count at the optical detector.

A quantum communications system includes a communications system. A quantum key distribution (QKD) system is operable with the communications system and includes a transmitter node, a receiver node, and a quantum communications channel coupling the transmitter node and receiver node. The transmitter node transmits to the receiver node a bit stream of optical pulses and includes a plurality of different photon sources, each having associated therewith a respective QKD protocol, and a controller configured to select a given photon source from among the plurality thereof.

In a general aspect, a quantum spectrum sensing system is presented. In some implementations, a quantum spectrum sensing system includes a laser system, a vapor cell sensor, and an optical detector. The laser system includes first and second lasers configured to generate a first and second laser signals. The laser system also includes first and second comb generators configured to produce first and second frequency comb signals based on the first and second laser signals, respectively. The laser system includes a frequency separator that can select frequency components of the second frequency comb signal and a frequency shifter that can shift the selected frequency components toward Rydberg states of a vapor. The vapor cell sensor can receive input optical signals from the laser system and produce output optical signals based on interactions of the vapor with the input optical signals. The optical detector can detect the output optical signals.

The invention discloses an underwater platform data acquisition and transmission system. The system comprises the following steps: an underwater data acquisition module acquires underwater environment information through a heterogeneous sensor and performs standardization processing; the channel modeling module analyzes underwater channel characteristics by using a self-adaptive channel model and generates channel estimation parameters; the channel estimation module is combined with a quantum interference measurement method to correct a channel state and optimize a channel model; the channel optimization and data fusion module constructs a joint feature matching network of underwater acoustic signals and quantum state signals to realize signal fusion and channel feature dynamic optimization; the data transmission optimization module adjusts a data transmission strategy based on the optimized transmission parameters, and the transmission stability is improved; and the energy management module adopts a dynamic power control strategy to realize low-power-consumption operation. According to the method, quantum measurement, sparse Bayesian channel modeling and an adaptive optimization method are combined, and the underwater channel estimation precision, the data transmission efficiency and the system stability are improved.

The invention discloses a quantum noise stream signal transmission method and device based on odd-order constellation forming in the technical field of optical transmission communication. The method comprises the following steps: generating four-dimensional chaotic sequences X, Y, Z and W by utilizing a 4D hyperchaotic model according to an initial key; performing serial-to-parallel conversion and up-sampling on the initial key, introducing error bits into a key matrix by utilizing W, and dividing the key matrix into a first state basis matrix and a second state basis matrix; performing specificity comparison or processing on the original data by using the X to obtain first data; dividing the first data into a data matrix and an index bit matrix, and performing joint index modulation to obtain a 9QAM signal; scrambling a subcarrier and a symbol point of the 9QAM signal by using the Y and the Z to obtain a 9QAM scrambled signal; and performing quasi-quantum noise stream encryption processing on the 9QAM scrambling signal by using the first state basis matrix and the second state basis matrix to obtain a 576QAM encrypted signal, performing OFDM modulation, and transmitting the 576QAM encrypted signal in an optical fiber channel.

The invention discloses a multi-modulation-format vector signal modulator based on microwave photonics, and relates to the field of microwave photonics. Comprising an IQ quadrature modulation module, a continuous wave laser, a first power optical splitter, an optical carrier frequency generation module, a polarization beam combiner, an optical amplifier, a polarization beam splitter and a photoelectric balance detector module, the IQ quadrature modulation module comprises a double-parallel Mach-Zehnder modulator, a first forming filter, a second forming filter, a first attenuator, a second attenuator, a first direct current voltage stabilization source and a second direct current voltage stabilization source. According to the invention, the formed and filtered IQ baseband signal is input into the double-parallel Mach-Zehnder modulator for quadrature modulation, the IQ baseband signal and the other path of optical carrier signal subjected to differential MZM frequency multiplication are subjected to polarization beam combination, and then the signal is converted into a radio frequency signal through PD, so that the generation of a high-frequency-band and multi-modulation-format vector signal is realized, and the high-frequency-band multi-modulation-format vector signal is suitable for the fields of high-speed communication, photon radar and the like.

The present invention provides a semiconductor apparatus achieving interconnection by using an on-chip all-optical switching network module and a manufacturing method therefor. The semiconductor apparatus comprises: a circuit board, which has a plurality of electrical connection paths; an on-chip all-optical switching network module, which is disposed on the circuit board, the on-chip all-optical switching network module comprising a photonic chip and a plurality of analog electrical chips for transceiving which are arranged above the photonic chip, the photonic chip comprising a plurality of communication nodes, a plurality of optical connection paths, and at least one on-chip optical switch which are in corresponding communication connection with the plurality of analog electrical chips for transceiving, and the on-chip optical switch being configured to alter the connection topology among the plurality of communication nodes; and a plurality of computing modules, which are arranged on the circuit board and, by means of the electrical connection paths on the circuit board, are in corresponding communication connection with the plurality of analog electrical chips for transceiving of the on-chip all-optical switching network module, so that the connection topology among the plurality of computing modules can be altered by the on-chip optical switch.

The various embodiments described herein include a phase shifter that can have a first electrode that has a distributed shape. The phase shifter can include a second electrode. The phase shifter can include an optical waveguide between the first electrode and the second electrode. Further, the phase shifter can include an active electro-optical material that propagates light, and phase shifts the light.

The invention provides a highway cloud toll collection system data transmission method, and relates to the technical field of data transmission. The highway cloud toll collection system data transmission method specifically comprises the following steps: S1, data acquisition; s2, data preprocessing; s3, transmitting visible light communication data; s4, road side unit data receiving and processing; s5, encrypting the data and transmitting the data to an edge computing node; s6, edge computing node data processing; s7, uploading the data to a cloud platform; and S8, carrying out deep analysis on the cloud platform data. The invention provides an expressway cloud toll collection system data transmission method which has the advantages of efficient data transmission, high safety, high reliability, intelligent data processing, high expansibility, cost effectiveness and the like. The overall performance and the user experience of the highway toll collection system can be obviously improved.

A sender system 2 is equipped with an optical transmitter 20 that transmits an encoded optical signal 40 at a predetermined strength via a line-of-sight (LOS) communication channel 4, and a key distillator 21 that generates a cryptographic key from a random bit sequence outputted by the optical transmitter 20 through a key distillation processing via an authenticated public communication channel 5. A legitimate receiver system 3 is equipped with an optical receiver 30 that receives the optical signal 40 from the optical transmitter 20 via the LOS communication channel 4, and a key distillator 31 that generates a cryptographic key from the random bit sequence outputted by the optical receiver 30 through the key distillation processing via the authenticated public communication channel 5.

The invention relates to the technical field of power system safety monitoring, in particular to a power transmission line online safety monitoring method, system and device based on quantum communication and a storage medium. The multi-modal fusion sensor synchronously collects multi-parameter electric signal data such as current, voltage and temperature of the power transmission line, and performs quantum encryption instantaneous recording on the data; based on quantum encryption instantaneous record extraction data, a deep learning adaptive Kalman filtering algorithm is combined with a neural network to predict the operation state of the power transmission line; generating a new Manchester code according to the multi-parameter electric signal data and the operation state predicted value, and encrypting by adopting quantum key distribution to generate a ciphertext; and transmitting the ciphertext to a client based on a terahertz communication channel, decrypting and recovering the data through the quantum key, and carrying out safety early warning. Theoretically uncracked data security assurance is realized by using the unclonable characteristic of the quantum state, high-rate data transmission is realized by terahertz communication, and the transformation from passive monitoring to active early warning is realized by a prediction algorithm.

A control system for a network of quantum systems operates the network to perform quantum informatics processing. The control system includes an entanglement scheduler configured to identify operations for which entanglement of two or more of the quantum systems is desired, identify plural potential entanglement attempts for generating the entanglement; and schedule at least some of the potential entanglement attempts to be performed to generate the entanglement for at least one of the operations. The entanglement scheduler may use direct entanglement, entanglement swapping and / or quantum teleportation approaches to generate the entanglement. The entanglement scheduler may schedule probabilistic entanglement attempts based at least in part on the probability of success of the entanglement attempts. The entanglement scheduler may generate entanglement to support plural branches of a quantum informatics process and / or to respond to events occurring while the quantum informatics process is executing.

The invention discloses an on-chip optical interconnection and switching chip and an application system thereof. Wherein the on-chip optical interconnection and exchange chip is integrated by a power divider, a bidirectional optical transceiver unit and an optical switch unit; the application system of the on-chip optical interconnection and switching chip comprises a multi-wavelength light source used for generating multi-wavelength optical carrier signals, a transceiving unit control and clock module used for bidirectional transceiving unit feedback / amplifier control and clock synchronization, and an optical switching control module used for switching an optical switching unit switching link. The chips and the modules are used for realizing optical interconnection and optical switching of the special electrical computing chip ASIC. According to the invention, bidirectional optical interconnection and exchange of special computing electric chips such as a CPU, a GPU, a DPU and the like can be realized by utilizing an on-chip optical interconnection and exchange technology, the interconnection rate is high, the exchange switching time is short, computing power cluster networking oriented to artificial intelligence application can be supported, and the application prospect is good.