98 results about "Quantum interference" patented technology

The invention relates to the technical field of engine testing, and discloses a reliability test method and system for a small general engine, and the method comprises the steps: collecting an engine vibration signal through a superconducting quantum interferometer, and collecting a temperature distribution parameter through a quantum dot temperature sensor; performing combined testing of cold and hot shock, high-load operation and random working conditions, and synchronously monitoring dynamic response characteristic data; constructing a Weibull probability model, and determining key influence factors through a global sensitivity analysis method; acquiring a surface roughness parameter by adopting a field emission scanning electron microscope, obtaining a material component parameter through energy spectrum analysis, and establishing a parameter mapping relation; establishing a vibration and temperature early warning system, executing a graded sweep frequency excitation and abrasive particle acceleration test, and recording a parameter degradation process; and generating a three-dimensional parameter cloud picture, and outputting a reliability test report. According to the method, the reliability of the small general engine can be comprehensively and efficiently evaluated, and a scientific basis is provided for design, maintenance and improvement of the engine.

A method of method of classifying data is disclosed. The method comprises manipulating quantum states of qubits of a quantum computing device based on a first copy of a test vector, a second copy of the test vector, a first training vector and a second training vector, so as to load a modified first copy of the test vector, a modified second copy of the test vector, a modified first training vector and a modified second training vector onto the quantum computing device, wherein the magnitude of the angle between the modified first copy of the test vector and the modified first training vector is equal to the magnitude of the angle between the first copy of the test vector and the first training vector, and where the magnitude of the angle between the modified second copy of the test vector and the modified second training vector is equal to the magnitude of the angle between the second copy of the test vector and the second training vector. The method also comprises performing quantum interference between the modified first copy of the test vector and the modified second copy of the test vector, and the modified first training vector and the modified second training vector, to provide modified quantum states of the qubits, performing a measurement on one or more of the qubits, and classifying the test vector based on the measurement.

The invention provides a superconducting diode based on superconducting quantum interference, a preparation method thereof and a quantum device. The superconducting diode provided by the invention can realize a one-way conduction function at an extremely low temperature, and has extremely low power consumption, so that basic parts of a low-temperature quantum circuit are greatly expanded. And the required external magnetic field is very small and can be provided by an external magnet and a current circuit prepared on the same chip as the device, so that the application is convenient. In addition, under low-temperature microwave irradiation, the device shows the capacity of small change along with microwave power, and it is indicated that the device also has the stable working capacity in the high-power microwave environment.

The invention provides a quantitative detection method and system for corrosion of steel bars in concrete, and belongs to the technical field of nondestructive testing and health monitoring of civil engineering structures. According to the method, an alternating weak magnetic field is applied to a reinforced concrete structure through a controllable magnetic field excitation device; a superconducting quantum interference magnetic sensor array is adopted to collect magnetic field response signals, and a space magnetic field gradient data set is obtained; performing wavelet packet decomposition and feature extraction on the data set to obtain a corrosion feature frequency band signal; based on a magnetic diffusion-corrosion coupling physical model, inversely calculating steel bar section corrosion rate distribution; and generating and outputting a three-dimensional corrosion distribution cloud picture and a quantitative evaluation report. The system comprises a controllable magnetic field excitation device, a superconducting quantum interference magnetic sensor array, a data processing and inversion calculation device and a result output device which are sequentially connected and cooperatively work. According to the invention, nondestructive, accurate and quantitative detection of corrosion of steel bars in concrete is realized, and the method has the advantages of strong deep penetration ability, high sensitivity to micro-corrosion, good field applicability and the like.

The invention relates to a superconducting quantum interference probe and a manufacturing method thereof. The method comprises the steps that an insulating layer stacked on a chip substrate is formed, and the chip substrate comprises a circuit layer; a needle body stacked on the insulating layer is formed, and the end, away from the insulating layer, of the needle body is provided with a needle point area; forming a prefabricated superconducting layer laminated on the needle body and the insulating layer; and etching the prefabricated superconducting layer to form a hole corresponding to the needle point region, and forming two slits which extend along the direction far away from the hole and are arranged at intervals with the hole, so as to obtain a superconducting quantum interference loop surrounding the hole based on the prefabricated superconducting layer. According to the method, the superconducting quantum interference loop located at the needle point can be integrated on the chip substrate.

The invention provides a path planning method and device, electronic equipment and a computer readable storage medium, and relates to the technical field of path planning. The method comprises the following steps: acquiring environment information required by path planning; determining a Hamiltonian model according to the environment information; determining evolution time of quantum random walk based on a Hamiltonian model; and based on the evolution time and a Hamiltonian model, obtaining an evolution result of the photons after quantum random walking in the waveguide array, and determining an optimal path according to the evolution result. Due to the adoption of a quantum random walking mechanism, path exploration can be carried out in parallel in a quantum superposition state, so that a plurality of paths are searched and evaluated at the same time, and the calculation complexity of path planning is remarkably reduced; moreover, the quantum random walk can more effectively explore the global path space through the quantum interference effect, and the problem that a traditional algorithm is easy to fall into local optimum is avoided, so that the global optimal path is more accurately found, and efficient and global optimal path planning is realized.

A diagnostic circuit includes a superconducting quantum interference device (SQUID) configured to be coupled to a test circuit such that an electronic noise present in the test circuit induces a first current that flows through the SQUID. The diagnostic circuit also includes a current path configured to receive a second current that flows through the SQUID. The SQUID is configured to generate an output in a form of: a first voltage in response to a sum of the first current and the second current being less than a threshold current and a second voltage in response to the sum of the first current and the second current being greater than the threshold current.

The invention relates to the technical field of performance testing, and discloses an equipment reliability testing system which comprises a refrigeration assembly, a testing assembly and a signal processing assembly. The refrigeration assembly comprises a vacuum container and a cold conduction platform arranged in the vacuum container; the test assembly comprises at least one test unit in thermodynamic connection with the cold conduction platform; wherein at least one test unit comprises a magnet exciting coil and a mounting table, and the mounting table is used for mounting tested equipment; the signal processing assembly is connected with the excitation coil; and when the reliability of the tested equipment is tested, the signal processing assembly is also connected with the tested equipment. By arranging the vacuum container, arranging the cold conduction platform in the vacuum container to guide the cold energy to the at least one test unit, and arranging the magnet exciting coil for the at least one test unit, a vacuum, low-temperature and magnetic field multichannel test environment is provided for the superconducting quantum interference device, so that the reliability test of the superconducting quantum interference device is realized.

The application discloses a quantum bit regulation circuit, a quantum chip and a quantum computer, and relates to the field of quantum chip control. Based on different frequency ranges, an external signal generator can output an electric signal including low-frequency control information and / or high-frequency control information to a control matching part through a first integrated control line by using only one control channel; the control matching part couples the electric signal including high-frequency control information with a cross capacitor to make the equivalent coupling capacitance value of the quantum bit equal to a target coupling capacitance value, and / or couples the electric signal including low-frequency control information with a superconducting quantum interference device to form a magnetic field to make the working frequency of the quantum bit equal to a target working frequency. In the case of only one control channel, the control matching part realizes the driving and frequency regulation of the quantum bit, reduces the control channel, provides convenience for the setting of a measurement and control channel, is beneficial to the wiring design and packaging of the quantum chip, and is beneficial to integrated design.

This application discloses a flexible power distribution network AC / DC hybrid control device and method empowered by quantum precision measurement. The device includes an AC / DC hybrid quantum interference measurement module, a quantum measurement control closed-loop linkage module, an adaptive quantum entanglement anti-interference shielding module, and a quantum classical collaborative backup control module. The method includes the following steps: S1, synchronously and precisely measuring the real-time magnetic field signals on the AC and DC sides of the AC / DC hybrid system; S2, amplifying the weak signals in the real-time magnetic field signals; S3, actively canceling external electromagnetic interference through the adaptive quantum entanglement anti-interference shielding module; S4, using the real-time magnetic field signals to solve the optimal power balance solution through the QUBO objective function and variational parameter optimization formula, and monitoring the state of the AC / DC hybrid system in real time, in order to solve the problems of large control delay, weak anti-interference capability, disconnect between measurement and control, and inability to adapt to dynamic topology changes in existing technologies.

The disclosed embodiment is about an adaptive strategy for the optimal photon number of a quantum interferometer radar under a stratocumulus cloud background. It includes: a QIR system generates detection photons and reference photons with preset photon numbers, and directs the detection photons toward the detection target; the QIR system receives the reflected detection photons; a mathematical model is established based on the influence of the scattering, absorption, and other characteristics of the liquid water content of the stratocumulus clouds in the atmospheric environment on the reflected detection photons, and the relationship between the liquid water content of the stratocumulus clouds, the number of radar transmitter signal photons, and the transmission distance of the detection photons is obtained; based on the relationship between the liquid water content of the stratocumulus clouds, the number of transmitter signal photons, and the transmission distance of the detection photons, the number of radar transmitter photons is adaptively adjusted so that the radar system can achieve the optimal average photon number. The disclosed embodiment effectively improves the robustness of the QIR system under the water content of stratocumulus cloud particles by adjusting the average photon number of the QIR system in real time.

One example includes a superconducting analog-to-digital converter (ADC) system. The system includes a control line configured to propagate an interrogation pulse and a superconducting quantum interference device (SQUID) comprising a first Josephson junction and a second Josephson junction. The SQUID can be configured to receive an input current. The first Josephson junction can be configured to trigger to provide a first pulse in response to the interrogation pulse and a first polarity of the input current and the second Josephson junction can be configured to trigger to generate a second pulse in response to the interrogation pulse and a second polarity of the input current. The system further includes an output stage configured to propagate the first pulse to an output to indicate the first polarity of the input current.

An optical path monitoring method comprising the following steps performed by a first node of an optical network: (i) generating photons that are at least partially indistinguishable in frequency, polarization, spatial pattern and temporal distribution; (ii) transmitting a first photon of the generated photons through an optical path to a remote node of the optical network; (iii) receiving the first photon from the remote node through an optical path; and (iv) interfering the received first photon with a second one of the generated photons to generate a quantum interference visibility output; and (v) evaluating the physical integrity of a single or more of the optical paths based on the quantum interference visibility output.

The invention discloses a frequency self-matching frequency domain quantum interference method and system and an intermediate node device, and relates to the technical field of light quantum information. The method comprises the steps that a first signal set from a first user side is received through a first optical fiber, a second signal set from a second user side is received through a second optical fiber, the first signal set comprises a first quantum optical signal and a first reference optical signal, and the second signal set comprises a second quantum optical signal and a second reference optical signal; the first signal group and the second signal group meet a preset wavelength condition; performing wave splitting on the first signal group and the second signal group to obtain a quantum optical signal group and a reference optical signal group; determining a target modulation signal according to the reference optical signal group; and acting the target modulation signal on the first quantum optical signal and the second quantum optical signal to enable the first quantum optical signal and the second quantum optical signal to generate frequency domain non-degenerate quantum interference. According to the method, the intermediate node does not need to deploy a complex feedback control device.

The nonlinear superconducting quantum circuit includes a resonator and a galvanically connected asymmetric thread superconducting quantum interferometer. The nonlinear superconducting quantum circuit has a first mode having a first resonant frequency and a second mode having a second resonant frequency. The ratio of the first and second resonant frequencies is different from 1 / 2. The resonator has a symbolic representation including a linear resonator including an inductance and a capacitor, and a nonlinear resonator including a capacitor and a superconducting quantum interferometer. The linear resonator and the nonlinear resonator are galvanically connected and arranged such that one has components connected in series and the other has components connected in parallel. The resonator is configured with an inductance and a capacitance that induces the first and second modes through the superconducting quantum interferometer such that the nonlinear superconducting quantum circuit has a zero-point variation of 0.05 radians or more in the superconducting phase across the superconducting quantum interferometer in the first and second modes.

The invention relates to a mine transient electromagnetic detection method and system based on a mine superconducting magnetometer, and belongs to the technical field of mine transient electromagnetic exploration. The device comprises a mining transient electromagnetic instrument, a mining superconducting magnetometer, a transmitting antenna and an antenna bracket, wherein the mining transient electromagnetic instrument consists of a control unit, a transmitting unit, a receiving unit and an explosion-proof protection power supply; the mining superconducting magnetometer is composed of a superconducting quantum interference device, a small non-magnetic Dewar, a signal detection unit and an explosion-proof protection power supply. The mining transient electromagnetic instrument, the mining superconducting magnetometer and the transmitting antenna are movably connected in pairs. The mining superconducting magnetometer is adopted to measure mining transient electromagnetic total magnetic field and secondary magnetic field signals, the characteristic of high sensitivity of the superconducting magnetometer to weak magnetic signals is utilized, the mining power supply multi-stage protection technology is combined, the effective length of the secondary field signals collected by mine transient electromagnetism is increased, the detection depth is increased, and the detection accuracy is improved. And safe use of the instrument in the underground coal mine is ensured, and great practical application significance is achieved.

Embodiments of the present application provide a method for determining quantum interference and related equipment. The method comprises: inputting a control signal on a first quantum bit, measuring the second quantum bit and the first quantum bit respectively according to the measurement operator of the second quantum bit and the measurement operator of the first quantum bit, and obtaining a set of measurement expectation values; and determining interference information of the signal acting on the first quantum bit on the second quantum bit according to a Hamiltonian model of a quantum chip and the set of measurement expectation values, the interference information being related to time. The method can determine the interference information of the signal acting on the first quantum bit on the second quantum bit, i.e., the dynamic process of the interference, according to the Hamiltonian of the first quantum bit and the second quantum bit and the measurement expectation values of the first quantum bit and the second quantum bit, thereby providing a reference for how to correct the interference signal, reducing the influence of the interference on quantum gate operation, and improving the accuracy of quantum gate operation.

Methods and systems are provided to generate and use pairs of highly nondegenerate frequency-entangled photons for Hong-Ou-Mandel interferometric measurement of local or remote samples. The use of highly nondegenerate frequency-entangled photon pairs enables ultra-high spatial resolutions even in the presence of background noise, dispersive intermediate media and / or dispersive or multi-interface targets, and high probe photon losses. The use of highly nondegenerate, narrow-band, frequency-entangled photon pairs for interferometric measurement of distance also allows the interferometer to be calibrated more easily for the two (or more) discrete narrow bands of wavelengths represented by the photon pairs. The use of narrow-band nondegenerate frequency-entangled photon pairs also permits improved noise rejection and increased fidelity in coincidence detection.

The quantum optical system changes a phase of quantum interference occurring between a plurality of physical processes, in each of which a quantum entangled photon pair of a signal photon and an idler photon is generated. Each of a plurality of pixels outputs a detection signal of the signal photon in a state where a sample is arranged in an optical path of the idler photon. A processor calculates an absorption spectroscopy characteristic based on an interferogram indicating a variation in a signal intensity acquired from each of the plurality of pixels in accordance with the change in the phase of the quantum interference. The processor: applies a processing to reduce phase difference of the interferogram among the plurality of pixels; spatially integrates, over the plurality of pixels, the interferogram having gone through the processing to reduce phase differences; and calculates the absorption spectroscopy characteristic based on the integrated interferogram.

The invention discloses a non-Arbel arbitrary sub-control system. The time division multiplexing module is configured to analyze the received control instruction, determine a first target radio frequency superconducting quantum interference device and a first control signal corresponding to the first target radio frequency superconducting quantum interference device, and send the first control signal to the first target interference device switch. Then, the first target interference device switch is configured to couple the first electrical parameter pulse signal to the first target radio frequency superconducting quantum interference device according to the first state switching instruction. And then, the first target radio frequency superconducting quantum interference device is configured to generate a target magnetic field according to the received first electrical parameter pulse signal, so that the superconducting vortex array layer forms a target vortex array matched with the topological structure of the radio frequency superconducting quantum interference device under the action of the target magnetic field, and each vortex in the target vortex array is used for constraining one non-Arbel arbitrary sub-. In this way, any non-Arbel sub-array can be formed as required.

The application discloses a soil sampling multi-objective optimization method based on a quantum annealing algorithm, which realizes efficient simplification of an original sampling point set on the premise of maximum reservation of pollution risk characteristics by constructing a comprehensive multi-objective evaluation function. The method innovatively integrates quantum tunneling, multi-state superposition, quantum interference and other quantum computing characteristics, and comprehensively considers four key indexes, i.e. spatial distribution similarity, three-dimensional volume overlap, pollution risk consistency and heavy metal migration mode consistency. The method guarantees sampling accuracy while significantly reducing cost, and provides an efficient and economical integrated solution for three-dimensional visualization of pollutants.

The quantum relay and quantum signal source exploit quantum properties of photon streams. A pair of spatially separated and polarization-entangled photon streams is used. The pair collectively exist in a quantum superposition state by virtue of their mutual entanglement. In the relay, an encoder establishes a modulation control signal corresponding to the information to be conveyed. An optical quantum circuit is placed in the path of one of the pair of streams, so that the first stream passes through it. The optical quantum circuit alters the quantum polarization state of the photon passing through it based on the control signal. In this way information is encoded into quantum probability distributions of the superposition state through quantum parallelism and quantum interference, whereby information is conveyed in the photon streams. In the signal source a second information source is used to modulate the other of the pair of streams, thus enhancing the information density of the system, by encoding both in the probability distribution and in the correlation of the photon arrival times.

The application provides a wind measurement laser radar system and method based on quantum interference, a laser provides pulsed laser and continuous laser; the pulsed laser is emitted to a target airspace and a backscattering signal is received; the continuous laser is divided into first and second interference local oscillation lights; the second interference local oscillation light is adjusted to obtain quantum interference local oscillation light with intensity in a set proportion to the intensity of the backscattering signal; the backscattering signal is switched to a classical or quantum interference detection channel; classical interference detection data are obtained in the classical interference detection channel, and first wind speed information data are calculated according to the classical interference detection data; first and second single-photon detection data are obtained in the quantum interference detection channel, and second wind speed information data are calculated according to the first and second single-photon detection data; the first and second wind speed information data are spliced and spline interpolated to supplement the missing wind speed information data caused by the response time of the optical switch, and the wind speed information of the target airspace is obtained.

A fault-tolerant quantum computer is implemented using hybrid acoustic electrical qubits. A control circuit includes a superconducting quantum interference device (ATS) with an asymmetric screw thread that excites phonons in a mechanical resonator by driving a storage mode of the mechanical resonator and dissipates phonons from the mechanical resonator via an open transmission line coupled to the control circuit, where the open transmission line is configured to absorb photons from a dump mode of the control circuit.

The invention discloses a contour parameter detection system and process for a silicon single crystal crude wafer, and the system comprises a holographic projection scanning module which generates a composite light beam by adopting a multi-wavelength laser beam combination technology, and relates to the technical field of semiconductor material detection. According to the contour parameter detection system and process of the silicon single crystal coarse wafer, all-directional and multi-angle scanning of the silicon single crystal coarse wafer can be realized through the holographic projection scanning module, the whole surface and subsurface area are covered, and the problem of limited detection range in the prior art is effectively solved; the conditions of missing detection of a key area and incomplete coverage of a core area are avoided, and meanwhile, the quantum sensing detection module has extremely high detection sensitivity based on quantum entanglement and quantum interference principles, and can sense tiny magnetic field, electric field and stress changes on the surface and in the silicon single crystal crude wafer, so that microdefects are accurately detected, and the detection accuracy is improved. The problem of insufficient microdefect detection sensitivity in the prior art is solved.

The present application relates to the technical field of laser quantum interference measurement, in particular to a three-degree-of-freedom angle measurement device and method based on radial polarized light, which can realize high-precision simultaneous measurement of three-degree-of-freedom small angles by using the characteristics of radial polarized light, combining advanced optical systems and signal processing technology. By using the self-collimation technology principle, the tight focusing characteristics of radial polarized light and the light splitting characteristics of Wollaston prism are combined, which can effectively improve the angle measurement resolution, angle measurement accuracy and other technical indicators; by using the focusing characteristics of the full-medium super-lens array and the CCD camera, the roll angle measurement system formed can greatly improve the measurement accuracy of the existing method.

The invention provides a space multiplexing light quantum interference device and an adjusting method, the light quantum interference device comprises N + 1 levels of interference assemblies, each level of interference assembly is suitable for receiving M beams of parametric light, the parametric light is pulsed light, each parametric light comprises a plurality of light pulses transmitted according to a time sequence, each stage of interference assembly is also suitable for enabling M light pulses received at the same moment to interfere to obtain M beams of interference light; the system comprises an N-stage optical fiber delay array, the ith-stage optical fiber delay array in the N-stage optical fiber delay array is arranged between the ith-stage interference assembly and the (i + 1) th-stage interference assembly, each stage of optical fiber delay array comprises M delay rings, the M delay rings delay the received M beams of interference light in a one-to-one correspondence mode, and the delay amounts of the M delay rings are different; wherein M beams of delayed interference light output by the ith-level optical fiber delay array serve as M beams of parametric light input to the (i + 1) th-level interference assembly, i is larger than or equal to 1 and smaller than or equal to N, and M is larger than 1.

The embodiment of the specification discloses a coupling control method, device and equipment of an Xmon type superconducting quantum bit and a medium. The method comprises the following steps: coupling two ends of a half-wavelength superconducting cavity with Xmon type superconducting quantum bits based on capacitance, and embedding a superconducting quantum interference device at a middle position of the half-wavelength superconducting cavity, wherein the distance between the Xmon type superconducting quantum bits is greater than a preset threshold, so that the direct coupling between the Xmon type superconducting quantum bits is lower than a preset influence value; acquiring the frequency of each Xmon type superconducting quantum bit through a reading cavity connected with each Xmon type superconducting quantum bit; adjusting the frequency of an adjustable cavity mode of the half-wavelength superconducting cavity according to a preset magnetic flux applied to the superconducting quantum interference device; and controlling the indirect coupling of the Xmon type superconducting quantum bits by adjusting the frequency difference between the adjustable cavity mode of the half-wavelength superconducting cavity and each Xmon type superconducting quantum bit, so as to realize the indirect coupling or disconnection between the Xmon type superconducting quantum bits.

This application provides a rubidium optically pumped magnetometer and its measurement method, belonging to the field of magnetometer technology. The entangled photon component includes a first laser and a nonlinear optical crystal, the nonlinear optical crystal being used to convert photons emitted by the first laser into entangled photon pairs; a rubidium atom gas cell for receiving the entangled photon pairs; a laser cooling system for cooling rubidium atoms to a Bose-Einstein condensate; and an interferometer phase detection system including a second laser, a first beam splitter, a beam combiner, and a signal processor. This application introduces entangled photons to form a quantum entangled state with rubidium atoms. The introduced entangled photons, through coupling with the rubidium atom system, form an enhanced quantum interference effect. Traditional rubidium optically pumped magnetometers are limited in measurement accuracy by quantum noise, but by introducing entangled photons, the system's measurement noise is reduced, thereby achieving higher measurement accuracy.