81 results about "Quantum information" patented technology

The present disclosure relates to a system and a method of performing Gaussian boson sampling via time multiplexing correlation of squeezed vacuum states for quantum information experiments. One embodiment relates to a method for performing Gaussian boson sampling comprising the steps of—generating a set of pulsed pairs of squeezed vacuum states,—performing time 2024 / 038212 multiplexed correlation of multiple of such pairs of squeezed vacuum states,—measuring, via a homodyne detection, a state from the pairs of generated squeezed vacuum states,—feed-forwarding the homodyne result of the measured states to a displacement unit,—performing displacement operations on the remaining state from the pairs of generated squeezed vacuum states, and—counting the states output from the displacement unit.

A photonic integrated circuit comprising one or more waveguides comprising a second order non-linearity configured to operate on optical pulses each having a pulse length shorter than 1000 optical cycles, as measured at their full width at half maximum. The circuit is configured to generate one or more quantum states carried by one or more of the optical pulses, manipulate one or more of the quantum states, and / or measure one or more of the quantum states.

This invention discloses a quantum entangled light spatial correlation imaging method based on iterative deconvolution, belonging to the field of quantum information. The method includes the following steps: illuminating the target sample with a position-momentum entangled light source, and acquiring multiple frames of entangled light carrying sample information using a single-photon camera; performing statistical operations on the acquired multi-frame images to remove irrelevant background noise and obtain a joint probability distribution image of the sample; extracting the correlation width using the spatial distribution image of the joint probability distribution through differential coordinate projection to construct the point spread function of the optical system; using the point spread function for forward convolution projection and backward error projection, updating the image estimate through iterative calculation until the convergence condition is met to obtain the target sample image. This invention utilizes a camera to image with a position-momentum entangled light source under low illumination conditions, which can obtain high-contrast target imaging and has potential advantages in imaging light-sensitive samples.

The application discloses a quantum device and an electronic device and a preparation method thereof, and belongs to the field of quantum information. The quantum device comprises a quantum chip, a signal transmission element formed on the quantum chip, and a connecting part electrically connected with the signal transmission element; a packaging substrate, a lead-out part formed on the packaging substrate, and a lead-out signal line for electrically connecting with a signal connector, the lead-out signal line being electrically connected with the lead-out part; and a ball grid array electrically connecting the corresponding connecting part and the lead-out part. The ball grid array electrically connects the connecting part and the lead-out part corresponding to the signal transmission attribute, thereby realizing the electrical connection between the quantum chip and the transmission line, and further leading out the connecting part to the external signal connector. In the application, the ball grid array does not generate a complex field effect, and the electrical connection of the corresponding connecting part and the lead-out part by the ball grid array can avoid the interference caused by the bonded aluminum wire.

The inventors have developed techniques to facilitate the operation of a quantum oscillator with increased bit-flip lifetimes by inducing an energetic asymmetry between qubit states. The technology may be used for the storage of quantum information or for providing a system for quantum information processing with longer bit flip lifetimes. The technology includes a qubit along with corresponding drives for controlling the energetic barrier and energetic asymmetry between the energetic potentials for each qubit state.

An artificial intelligence based computer security system includes a critical infrastructure protection & penalty (CIPR) through cloud & tiered information security (CTIS), a machine secret intelligence (MACINT) & penalty through clandestine operations in cyberspace, a logical inference zero database (LIZARD) priori real time defense, a critical thinking memory & perception (CTMP), a lexical objectivity mining (LOM), a linear atomic quantum information transfer (LAQIT), and a universal BCHAIN all things connected (UBEC) system with basic connectivity coordination attachment integrated nodes.

A quantum computing system may include a dual-helix quantum encoding structure a multidimensional modulation controller. The dual-helix quantum encoding structure may include a first helix chain and a second helix chain. The multidimensional modulation controller may be configured to modulate quantum information in the first and second helix chains using two or more of frequency modulation, phase modulation, and amplitude modulation. The frequency, phase, and amplitude modulation may enhance information processing, storage, parallel computation, and error correction in quantum computing systems. Alternatively or additionally, embodiments herein may provide a new direction for scaling quantum computers for large-scale, complex tasks, and may offer improvements in speed, accuracy, and efficiency.

The invention relates to the technical field of quantum information, and discloses an integrated superconducting quantum bit radio frequency module, which comprises a distribution board card, a merging board card, a reading board card and a case shell, and is characterized in that the distribution board card and the merging board card are connected and fixed through an inter-board radio frequency connector; the assembling number of the combination board cards is determined by the final distribution number of the distribution board card power division circuit, an IQ signal of an IQ combiner in the distribution board card is connected to the board connection vertical paste connector after passing through the Gaussian filter circuit, and other signals, except the IQ signal, of the IQ combiner in the distribution board card are connected in and out from the side paste radio frequency connector; the function structure of the reading board card is similar to that of the distribution board card, and the reading board card is used for controlling a reading circuit of the superconducting quantum computing chip.

The invention relates to quantum key distribution, in particular to a passive optical network system based on continuous variables and a multi-user key distribution method, and the method comprises the following steps: a provider is used as a network center and is responsible for generating a randomly modulated continuous variable coherent state; the quantum broadcast channel is used for transmitting a coherent state from a provider to the passive optical beam splitter by taking an untrusted single-mode optical fiber as a medium; the passive optical beam splitter is a passive core device and is used for definitely distributing the coherent state into a plurality of parts according to energy and distributing the coherent state to a plurality of user terminals; the user terminal measures the orthogonal component of the received optical signal, extracts the quantum random number of the original code, and completes the receiving and analysis of the quantum information; the classical authentication channel is used for establishing a secure classical communication link between a provider and a user terminal and is used for key post-processing negotiation and compressing coordinated data into a final secure key according to a parameter estimation result and a security protocol; according to the invention, the defect that deterministic and simultaneous multi-user key distribution is difficult to realize can be overcome.

The invention discloses a new-generation cryptographic system and method based on a physics quantum dynamic public key and a cloud entropy synchronous private key, a terminal, a server and a medium, and relates to the technical field of quantum information technology, cryptography and Internet of Things security crossing. The system comprises a terminal, a server and a cloud entropy synchronization private key library, and the terminal is configured to generate a quantum random number by using a quantum random number generation module, generate a synchronization parameter based on the quantum random number, and send the synchronization parameter or a physics quantum dynamic public key exported by the synchronization parameter to the cloud entropy synchronization server; and the terminal and the cloud entropy synchronization server are further configured to determine the same target entropy material from the cloud entropy synchronization private key library by applying the same cloud entropy mapping algorithm based on the synchronization parameter, and generate the same session key based on the target entropy material. According to the key system, non-interactive key establishment, forward secrecy and endogenous quantum computing attack resistance are realized.

A quantum information system comprising a quantum information element and a control line, the quantum information element comprising: a first Josephson element and a second Josephson element, each Josephson element comprising a Josephson junction disposed between two superconducting islands, one of the superconducting islands is shared by the first Josephson element and the second Josephson element; wherein the superconducting island of the first Josephson element is coupled to the superconducting island of the second Josephson element such that the quantum information element comprises a plurality of states, the plurality of states comprising a first state, a second state, and a third state, where there is a single excitation transition between the third state and the first state, and there is a single excitation transition between the third state and the second state; and wherein the control line is configured to encode one of two states of the computing subspace into the quantum information element, a first state of the computing subspace corresponding to the first state, and a second state of the computing subspace corresponding to the second state.

The application provides an optical quantum computing system, an optical quantum chip and an optical quantum computer, and relates to the technical field of quantum computing. The system comprises a plurality of optical waveguides, a plurality of spatial processing modules and a plurality of temporal processing modules are arranged on the plurality of optical waveguides, wherein: the spatial processing module is used for performing quantum state transformation on input optical quantum information to realize spatial parallel processing; the temporal processing module is used for performing time adjustment processing on the input optical quantum information to realize time multiplexing; the spatial processing modules and the temporal processing modules are alternately arranged between the spatial processing modules and the temporal processing modules, and the adjacent spatial processing modules and the temporal processing modules are connected through the plurality of optical waveguides. The embodiment of the application can realize the dual effective expansion of the scale and the depth of quantum computing.

Systems, methods, and apparatus are provided for tracking user interactions in a quantum system. An authentication persona may be routed to a quantum processor. The quantum processor may generate a virtual quantum channel. The virtual quantum channel may execute multiple attribute-based authentication chains concurrently. The quantum processor may dynamically change the attributes in the authentication chains for the duration of a user session. The quantum processor may substantially continuously validate the attributes in each chain for the duration of the user session. The quantum processor may map the virtual authentication channel to a potential state of quantum information. In some embodiments, the system may automatically scale the quantum processor during an authentication task by adding additional quantum circuits to each quantum thread when the authentication task has a duration that is longer than a threshold duration and / or a volume that is larger than a threshold volume.

The invention belongs to the field of quantum information, and discloses a superconducting single-photon detection system, which adopts a parallel vertical compact integrated layout, and comprises a superconducting single-photon detector array arranged in a stable low-temperature area in a low-temperature thermostat; the low-temperature thermostat is used for providing and maintaining a vacuum and low-temperature environment required by the working of the superconducting single-photon detector array; the refrigerating machine compressor unit is coupled with the cryostat through a cold head and used for providing cooling capacity; the electric control module is connected with the superconducting single-photon detector array and the refrigerating machine compressor unit and is used for providing bias, signal processing and state monitoring; wherein the superconducting single-photon detector array, the cryostat, the refrigerator compressor unit and the electric control module are compactly integrated in the vertical direction. By means of the highly integrated and miniaturized system layout, the total height of the system does not exceed 0.5 m, the installation specification of the 11U standard is met, and therefore the problems that a traditional system is large in size and difficult to deploy are solved.

The embodiment of the application relates to the technical field of quantum information, and discloses a novel narrow-line-width entangled light source, a working method and a quantum information processing system. In the application, a pump light source with independently adjustable power and line width is directly combined with an entanglement generation module based on a beam splitter, single-polarization pump light with independently and continuously adjustable power and line width can be generated, and high-quality entangled states are stably generated by using the pump light through a polarization crosstalk-free splitting scheme based on a beam splitter. Therefore, the adaptation capability of the entangled light source to different application scenarios (such as quantum key distribution and entanglement exchange) and the purity of the entangled states are significantly improved.

The invention relates to the technical field of quantum information, in particular to a passive decoy state-based reference system independent quantum key distribution method. A reference frame independent quantum key distribution (RFI-QKD) protocol may still generate a secure key when the reference frame has a slow and unknown drift. In order to solve the potential side information leakage loophole in the active decoy state modulation process, the RFI-QKD protocol based on the passive decoy state is invented. Two beams of weak coherent light are subjected to interference in the beam splitter, and the signal light at the output end is divided into two types of photon number distribution according to the response result of the detector end, so that the risk caused by active modulation of light intensity can be avoided. Considering that single photon avalanche detectors (SPAD) of a transmitting end and a receiving end have inevitable post-pulse effects, a post-pulse compatible analysis model is constructed. A simulation result shows that the method is good in performance in an actual application scene.

This invention relates to the field of network security technology, and in particular to a unified management and key distribution method for encryption machines based on quantum key cloud. The method includes: receiving a registration request and extracting the device name, authentication information, and timestamp; completing identity authentication, authorization management, and generating device quantum information; subsequently collecting online status data and determining the device usage status corresponding to the central processing unit, memory, disk, and network port; generating anomaly status judgment results by comparing authentication information and communication status; then outputting alarm information, blocking illegal connections, verifying permissions, matching key identifiers, and distributing quantum ciphertext data; and completing quantum key acquisition, generating acquisition confirmation messages, data encryption and decryption, key update management, and resetting password verification and factory reset processing. This invention significantly improves the security, real-time performance, and closed-loop autonomous capability of unified management of encryption machines.

The arrangements disclosed herein relate to systems, apparatus, methods, and non-transitory computer readable media for receiving, by a server from a first device via a quantum channel, first verification information associated with a user of the first device. The server determines that the first verification information fails to verify against second verification information. In response to determining that the first verification information fails to verify against second verification information, the server stores the first verification information. In response to receiving, by the server from a second device, the first verification information and device information of the second device, the server flags the device information of the second device as a potential origin of fraud.

The application relates to the technical field of spin electronics devices and quantum information devices, and provides a superconductor-spin switchable device and a superconductor-spin switching method.The device comprises a magnetic layer and a non-magnetic layer; the magnetic layer has perpendicular magnetic anisotropy; and the non-magnetic layer is a layer; the magnetic layer and the non-magnetic layer form a magnetic / non-magnetic heterojunction; under the condition of being lower than a first temperature, the In-Bi-based alloy layer has superconducting characteristics; and under the condition of being higher than the first temperature, the In-Bi-based alloy layer can realize current-spin current conversion.The application can realize a new type of functional material and a device thereof which can exhibit superconducting characteristics and high-efficiency current-spin current conversion capability in the same material system, break through the limitation of separation of traditional superconducting materials and spin materials, and realize integrated and cooperative work of the two.

The present invention relates to a quantum convolutional neural network system and a method of operation for processing quantum states to estimate intrinsic properties. More specifically, the invention relates to a technique for transforming an input quantum state, measuring the first qubit, processing the state based on the measurement result, and calculating the intrinsic properties of the transformed state. The present invention provides a quantum convolutional neural network system composed of a learning unit, a quantum layer structure unit, and a computation unit. The learning unit receives an input quantum state and is designed to maximize the measurement probability of the first qubit by learning a unitary operator based on a local cost function. The learned unitary operator transforms the quantum state through the quantum layer structure unit; the transformed state is then measured by the first qubit, and the residual state is transmitted to the next layer or re-measured based on the measurement result. The present invention provides a technique that efficiently processes input data during the quantum neural network learning process and enables accurate analysis of quantum states and efficient dimensionality reduction. Through this, high performance and reliability can be secured in various application fields such as quantum information theory, quantum data analysis, and quantum machine learning.

Pauli surface codes form a class of two-dimensional codes from which a two-dimensional code may be selected to store quantum information for a particular application. The Pauli surface codes allow more flexibility in selecting a code configuration that bests meets the need of the particular application. For example, Pauli surface codes are not restricted to placing qubits on a square grid, as has been the case in previous surface codes. Additionally, a process for selecting a configuration to be used to implement a two-dimensional code for storing quantum information considers different Pauli codes and May utilize a machine learning algorithm to select a given Pauli code that is well suited for the particular application.

The invention discloses a strong pumping bilateral resonance modulation-demodulation magnetic sensitivity enhancement method of a quantum magnetic compass. The method comprises the following steps: constructing a quantum magnetic compass platform comprising a sensing unit and external optical and microelectronic devices; quantum state enhanced reading containing magnetic vector information is realized by using a pumping enhancement mode; a standard diamond is used, the thermal conductivity and the light transmission of the diamond are utilized, the initialization of a quantum state is realized by using near-saturation external pump light, the line width is narrowed, and the magnetic measurement sensitivity is improved; noise in the environment is filtered out in a modulation and demodulation mode, and high-robustness extraction of quantum information is achieved. By enhancing the laser pumping power, the emission speed of the solid-state quantum color center ensemble fluorescence photons is increased, the full width at half maximum of a magnetic resonance curve is compressed, and the measuring capacity of the solid-state quantum color center to a magnetic field is improved; accurate measurement of external magnetic field signals through the solid quantum color center in the diamond is realized.

Distributed quantum file consolidation is disclosed. A controlling quantum computing system (QCS) determines to consolidate a quantum file that includes a plurality of qubits implemented on a plurality of quantum computing systems (QCSs) onto a target QCS, the plurality of qubits including at least a first qubit implemented on a first QCS of the plurality of QCSs. The controlling QCS causes a transfer of quantum information contained in each qubit of the plurality of qubits that is not currently implemented on the target QCS to a corresponding qubit on the target QCS. Quantum file update information that indicates the qubits that compose the quantum file are located on the target QCS is communicated to at least the first QCS.

The invention relates to the technical field of quantum information, in particular to a phase matching quantum key distribution calculation method compatible with a post-pulse effect. Comprising the following steps: preparing quantum states for an Alice end and a Bob end based on a PM-QKD system, and sending the quantum states to a Charlie end through a quantum channel for state measurement; the Charlie end declares execution of a corresponding event of successful measurement, and a retention event is established through the Alice end and the Bob end; based on a retention event screening key, quantum state channel parameter information considering a post-pulse effect is analyzed; extracting a security key according to the channel parameter information; according to the method, the actual PM-QKD model compatible with the post-pulse is established, errors of numerical simulation and actual experimental observation quantity are effectively corrected, the safety of the PM-QKD system is improved, and technical support with higher reliability is provided for deployment of an actual quantum communication network.

Systems and methods of the disclosed technology relate to hybrid integrated superconducting systems, superconducting components such as quantum wave shutters, quantum multiplexers, quantum wave memories and / or other disclosed aspects. In one example embodiment, a superconductor Metal-Oxide-Semiconductor (SMOS) chip is disclosed containing one or more superconducting components on a single die, wherein the one or more superconducting components may include a classical computing system or devices, a quantum computing system and / or devices that manipulate and control quantum waves, and a signal conversion subsystem that transforms signals between classical subsystems and quantum subsystems in order to establish a connection between classical and quantum information. Additional aspects relate to quantum devices and their structure(s) such as quantum wave shutters, quantum multiplexers and / or quantum wave memories, among other innovative systems, devices, features and functionality disclosed herein.

This invention discloses a method and system for implementing a completely reference-frame-independent quantum key distribution protocol, belonging to the field of quantum information technology. Alice and Bob, the communicating parties, randomly select mutually unbiased basis vectors to prepare quantum states and send them to a third party, Charlie. Charlie performs Bell state projection measurements and announces the success. Both parties publish the basis vector information, divide the dataset, and calculate the gain and bit error rate. A 3×3 correlation tensor matrix is ​​constructed and singular value decomposition is performed to obtain three reference-frame-independent singular values. The secure key rate is calculated based on the bit error rate. Finally, key negotiation and security enhancement are performed to extract the secure key. This invention does not require basis vector alignment, completely eliminating the dependence on reference frame calibration. It can still stably generate keys even with basis vector drift, and the amount of information required by eavesdroppers is lower, significantly improving the practicality and security of the quantum key distribution system.

The invention belongs to the technical field of quantum information, and relates to a non-detection photon imaging system based on a single optical fiber integrated nonlinear waveguide. Comprising a continuous tunable pumping laser source, an optical amplifier, an adjustable optical attenuator, a first beam splitter, a first adjustable optical delay line, a first polarization controller, a second polarization controller, a first optical circulator, a nonlinear straight waveguide, a second optical circulator, a first optical filter, a second optical filter, a third optical filter, a fourth optical filter, a third optical circulator, a second adjustable optical delay line and an optical absorption terminal. The system comprises a first light collimator, a first lens, a three-dimensional scanning platform, a second lens, a second light collimator, a second beam splitter, a third polarization controller, a fourth polarization controller, a first single-photon detector, a second single-photon detector and a coincidence measurement unit. Compared with a traditional non-detection photon imaging system, quantum imaging of a transparent object can be achieved only through half of resource expenditure, and robustness is provided for the imaging system through all-fiber integrated configuration.

The invention discloses a quantum information feature extraction method, computer equipment and a computer readable storage medium. The method comprises the steps of obtaining quantum observation data of a quantum system; performing frequency domain conversion processing on the quantum observation data, and determining frequency domain characteristic data corresponding to the quantum observation data; according to the frequency domain feature data, target feature parameters are determined, and the target feature parameters are used for regulating and controlling the quantum system. Therefore, the frequency domain feature data can be obtained by performing frequency domain conversion processing on the quantum observation data, so that the target feature parameters are accurately obtained according to the frequency domain feature data, high-precision extraction of the target feature parameters is ensured, support is provided for accurate calibration of a quantum system, and automatic extraction of the quantum information feature data is realized. In addition, compared with a mode of judging the regulation and control parameter value of the quantum system only depending on experience, the implementation mode of the invention can eliminate subjective errors and improve the calibration precision of the quantum system.

This application discloses a method and related apparatus for determining quantum state prediction values, relating to the field of quantum information technology. It includes: after determining the first and second quantum state data of the quantum system to be predicted, inputting these two types of data into a quantum system evolution predictor to obtain the third quantum state data. This application captures the time-varying second quantum state data through continuous weak measurements, solving the problem in traditional schemes where projective measurements disrupt the original evolution path of the quantum system, ensuring that the quantum system evolves according to the original path. Simultaneously, after capturing the second quantum state data closely related to spatiotemporal correlation noise through continuous weak measurements, a pre-trained time-series model is used, i.e., the quantum state evolution predictor learns the spatiotemporal correlation characteristics implicit in the second quantum state data, improving prediction accuracy in complex environments and enabling more accurate prediction of quantum state data during the evolution of the quantum system.

According to the low-noise quantum interface device and the corresponding quantum information transmission method, a lithium niobate waveguide and a hollow anti-resonance optical fiber are organically combined together, so that SRS and SBS noise generated in the transmission process of high-power pumping laser and control laser in the prior art can be eliminated by means of an air core transmission mechanism of an HC-ARF; low loss is allowed to be realized on an input / output full link by means of low-loss windows on an atomic wave band, a communication wave band and a pump light wave band, and meanwhile, functional units such as electro-optical modulation, nonlinear frequency conversion and optical routing are allowed to be integrated on a single chip on the basis of taking a lithium niobate waveguide as a platform; according to the quantum interface device, the insertion loss, the packaging complexity and the system size are reduced, and the mechanical stability and the thermal stability of the system are greatly improved, so that the performances of high performance, low noise, high integration and the like are simultaneously realized on the quantum interface device, the quantum interface device can be separated from an optical vibration isolation platform, and the requirement of field deployment is met.