44 results about "Quantum interference" patented technology

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.

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.

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.

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.

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.

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 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.

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 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.

The invention relates to a polarization entangled photon pair, in particular to a polarization entangled photon pair generation method and device based on a mixed framework, and the method comprises the steps: bidirectional excitation: a dual-wavelength polarization beam splitter (PBS) divides laser into two beams of light which are horizontally and vertically polarized, and the two beams of light are transmitted in the clockwise CW direction and the anticlockwise CCW direction of a Sagnac interference ring respectively; photon pair generation: the two beams of light are coupled into a waveguide, and in the waveguide, horizontal polarized light propagating along the clockwise CW direction and vertical polarized light propagating along the anticlockwise CCW direction respectively generate a pair of photon pairs; quantum interference and entanglement generation: after the two paths of photon pairs are output from the waveguide, the two paths of photon pairs converge at a dual-wavelength polarization beam splitter (PBS) again, the amplitudes of the two paths of photon pairs are coherently superposed by regulating and controlling the phase in a Sagnac interference ring, and an ideal polarization entanglement singlet state is generated at two output ports of the dual-wavelength polarization beam splitter (PBS); according to the invention, the defect that high brightness, high efficiency, high entanglement fidelity, high spectral purity and high photon indistinguishability cannot be synchronously realized can be effectively overcome.

The invention provides a detection system and detection method of a quantum magnetic calorimeter, the quantum magnetic calorimeter comprises a magnetic calorimetric chip and a magnetic shielding cylinder, the magnetic shielding cylinder has a placing space, and the magnetic calorimetric chip is arranged in the placing space; the detection system comprises a superconducting quantum interference chip, a low-temperature platform, a modulation module and a signal processing device. The superconducting quantum interference chip is arranged in the placing space; the magnetic shielding cylinder is fixed to the low-temperature platform; the modulation module is arranged outside the magnetic shielding cylinder, the modulation module is electrically connected with the superconducting quantum interference chip, and the modulation module is used for adjusting bias voltage and bias current of the superconducting quantum interference chip; the signal processing device is arranged outside the magnetic shielding cylinder, the signal processing device is electrically connected with the superconducting quantum interference chip, and the signal processing device can output a noise spectrum, a bias current-bias voltage curve and a bias voltage-magnetic flux curve of the superconducting quantum interference chip. The shielding effect of the magnetic shielding cylinder is detected by obtaining the magnetic flux noise of the superconducting quantum interference chip.

The invention provides a reservoir production dynamic optimization decision method and system, and relates to the fields of physics, machine learning and data mining. According to the global quantum state characterization method based on quantum reservoir parametric modeling and weak Hopf tensor product fusion, a quantum interference fringe-based adaptive regularization parameter dynamic adjustment mechanism, a quantum gradient descent algorithm and a distributed collaborative architecture are combined; the technical bottlenecks of traditional static parameter setting, classical optimization dimension limitation and multi-well-site isolated optimization are broken through, and dynamic global optimal balance of physical fidelity and economic benefits is achieved for the first time in reservoir production optimization.

The application discloses a method for unmanned aerial vehicle cluster to cooperatively detect interference areas and locate the center, which comprises the following steps: activating the airborne quantum-enhanced inertial navigation system to obtain absolute position without drift when the navigation is disturbed; combining the multi-sensor fusion measurement value and the initial credibility evaluated dynamically to encode into a logic quantum bit parameter; constructing a multi-bit global quantum superposition state at the fusion center, executing a quantum consensus algorithm containing a dynamic oracle operator, and using quantum interference to quickly amplify the probability amplitude of the honest node group; measuring the ground state after the wave function collapses to accurately strip the Byzantine malicious nodes; finally, extracting a pure high-trust data set and iteratively locating the interference center based on the particle filtering algorithm. The application breaks away from the dependence on external navigation, improves the computing efficiency of anti-malicious fraud and the positioning robustness in complex nonlinear environments.

The invention provides a bulwark armor block health monitoring method and platform, and relates to the technical field of structure health monitoring. The method comprises the following steps: generating entangled photon pairs comprising detection photons and reference photons based on a quantum entangled photon source; the detection photons are emitted into the armor block and interact with one another; receiving a returned quantum signal; performing quantum interference measurement based on the returned quantum signal and the reference photon to obtain quantum interference data; reconstructing an internal structure image of the armor block through a quantum state tomography algorithm based on the quantum interference data; and identifying defect types and positions based on the internal structure images. According to the invention, the quantum entanglement and interference technology is utilized, high-resolution and high-precision nondestructive detection and intelligent defect identification of the internal structure of the armor block are realized, and the monitoring depth, accuracy and anti-interference capability are effectively improved.

The invention relates to a superconducting quantum testing device which is used for testing a sample in a room temperature environment, the superconducting quantum testing device comprises a liquid helium generating structure, a first liquid helium conveying assembly, a liquid helium storage assembly, a second liquid helium conveying assembly and a testing structure which are connected in sequence, and the testing structure comprises a testing assembly and a containing assembly. The test assembly comprises a test piece and a superconducting quantum interference piece, the test piece is provided with a test cavity, and the superconducting quantum interference piece is arranged in the test cavity. According to the arrangement, through the space separation layout, vibration generated by the refrigeration part in the liquid helium generation process cannot be directly transmitted to the test structure, and the influence of the generated vibration and magnetic noise on the test result of the test structure is avoided; the test assembly and the accommodating assembly are arranged in an up-and-down separated manner, so that the sample can be independently arranged in a room temperature environment.

The invention relates to the technical field of laser quantum interference measurement, in particular to an absolute angle measurement device and method based on compressed light and an etalon, which can realize high-accuracy measurement of an absolute angle so as to obtain angle measurement breaking through a standard quantum limit. According to the invention, the quantum enhancement characteristic of the compressed light source is combined with the Fabry-Perot interference angle measurement principle, so that the technical indexes such as angle measurement resolution and angle measurement precision can be effectively improved; the normalized output quantities of the two Fabry-Perot etalon are utilized to compensate the influence on angle measurement caused by the change of the light intensity of the incident light, and the simultaneous high-accuracy measurement of the relative angle and the absolute angle can be realized.

The invention relates to the technical field of quantum optics and optical fiber communication, and provides an HOM interferometer with an all-fiber structure and a quantum interference method, and the HOM interferometer comprises an optical fiber beam splitter which comprises a first input port, a second input port, a first output port and a second output port; the entangled photon pair source is used for outputting a photon A and a photon B; the input end of the first optical path is used for receiving photons A in the entangled photon pair source, the output end of the first optical path is connected to a first input port of the optical fiber beam splitter, and an optical fiber polarization controller and a first band-pass filter are connected to the first optical path; the input end of the second optical path is used for receiving photons B in the entangled photon pair source, the output end of the second optical path is connected to a second input port of the optical fiber beam splitter, and an optical fiber electric delay line and a second band-pass filter are connected to the second optical path; and the detection system is connected with the first output port and the second output port. According to the invention, crosstalk between control parameters can be avoided, and the measurement stability is improved.

A non-linear superconducting quantum circuit comprising at least one resonant portion and an asymmetrical threaded superconducting quantum interference device connected to said at least one resonant portion galvanically, said non-linear superconducting circuit having a first mode with a first resonant frequency and a second mode with a second resonant frequency, the ratio between said first resonant frequency and said second resonant frequency being different from ½, said at least one resonant portion being configured with inductance and capacitance values of its symbolic representation which induce with said asymmetrical threaded superconducting quantum interference device said first mode and said second mode such that, said non-linear superconducting quantum circuit has zero-point fluctuations of the superconducting phase across the asymmetrical threaded superconducting quantum interference device for the first mode and the second mode which are superior or equal to 0.05 rad.

The invention relates to fault tolerant quantum hardware using hybrid acoustoelectric qubits. A fault tolerant quantum computer is implemented using hybrid acoustoelectric qubits. The control circuit comprises a superconducting quantum interference device (ATS) with asymmetric threads; the superconducting quantum interference device with asymmetric threads excites phonons in a mechanical harmonic oscillator by driving a storage mode of the mechanical harmonic oscillator and dissipates the phonons from the mechanical harmonic oscillator via an open circuit transmission line coupled to the control circuit, wherein the open transmission line is configured to absorb photons from a dump mode of the control circuit.

The present application relates to the technical field of laser quantum interference measurement, in particular to an angular vibration measurement device and method based on a squeezed state light source, which can measure high-frequency angular vibration parameters, and the measurement result is expected to break through the standard quantum limit, and effectively improve the measurement accuracy. The present application uses a continuous variable squeezed state quantum light source combined with linear interference measurement to propose a high-frequency angular vibration measurement device based on a squeezed state light source, which can measure high-frequency angular vibration parameters, and the measurement result is expected to break through the standard quantum limit, effectively improve the measurement accuracy, solve the problem that the measurement result cannot break through the standard quantum limit in the traditional interference measurement process, and thus realize high-sensitivity measurement.

The utility model discloses a three-dimensional adjusting bracket for a superconducting quantum interference device, which is used for adjusting the superconducting quantum interference device and is characterized in that a support frame is arranged on two sides of a quantum chip packaging box; the first adjusting piece can move in the XY horizontal direction relative to the upper end of the supporting frame, and the supporting frame and the first adjusting piece are fixed through the penetrating groove. The second adjusting piece is nested in the first adjusting piece, and the nesting face of the second adjusting piece is a vertical face. The second adjusting piece can move up and down in the Z direction relative to the first adjusting piece, and the second adjusting piece and the first adjusting piece are fixed through the penetrating groove and the threaded hole. The sleeve is rotatably arranged at the bottom of the second adjusting piece. According to the utility model, centimeter-level XYZ three-axis displacement adjustment and omni-directional rotation around the Z axis are realized, and the XYZ-axis positioning precision reaches a hundred-micron level by matching the precise adjusting screw with scale marks and a gradienter tool.

The technology disclosed in this patent document can be implemented to combine quantum computing and classical digital computing in a scalable computing system based on superconducting qubits using Josephson junctions that exhibit low dissipation long coherence times and can be fabricated with well-developed integrated circuit fabrication techniques. More specifically, the disclosed technology can be implemented by using two radio frequency (RF) superconducting quantum interference device (SQUID) circuits coupled in balance to preserve general symmetry and form a quantum readout circuit for reading and digitizing a superconducting qubit state with improved readout fidelity and sensitivity.

The present application relates to the technical field of particle acceleration, in particular to a neutron radiation detection device based on a superconducting quantum interferometer and a particle accelerator, the neutron radiation detection device comprising a neutron conversion mechanism, a magnetic flux coupling mechanism and a superconducting quantum interferometer arranged in sequence, the magnetic flux coupling mechanism comprising a superconducting induction coil adjacent to the neutron conversion mechanism and a magnetic flux concentrator adjacent to the superconducting quantum interferometer, so as to utilize the ultrahigh sensitivity of the superconducting quantum interferometer to the magnetic signal of the order of picotesla, combine the neutron conversion mechanism and the magnetic flux coupling mechanism, and construct an efficient conversion link of "neutron-charged particle-magnetic flux-electrical signal", wherein the superconducting quantum interferometer greatly improves the neutron radiation detection sensitivity, realizes accurate detection of neutron radiation, and is further provided with a signal processing mechanism connected with the electrical signal of the superconducting quantum interferometer, so as to realize real-time monitoring of the neutron flux change and provide early warning for the safety of nuclear facilities.

The application provides a multifunctional chip integrated Mach-Zehnder interferometer, which can support functions such as all-optical quantum path selection, Hong-Ou-Mandel interference, wavelength conversion based on nonlinear effects, all-optical switching based on cross-phase modulation or photo-induced free carriers. Based on the relatively mature chip integrated optical path preparation process at the present stage, the application takes into account the advantages of high modulation rate, low insertion loss, high mechanical stability, high preparation efficiency and the like, and is expected to be widely applied in super-large-scale chip integrated optoelectronic systems, and to provide solid support for various applications such as coding and decoding integrated all-optical communication, communication detection integrated quantum interference, multi-degree-of-freedom multiplexing signal processing and the like.

Provided is a measurement method using a quantum optical system configured to cause quantum interference between a plurality of physical processes in which quantum entangled photon pairs of signal photons and idler photons are generated, the method comprising executing object part quantum measurement for acquiring a quantum interference signal for a measurement object part included in a sample and having unknown reflectance at the wavelength of the idler photons, and calculating the reflectance of the measurement object part from the quantum interference signal acquired by the object part quantum measurement, the object part quantum measurement including sweeping the optical path length difference between the optical path length of the signal photons and the optical path length of the idler photons by adjusting the optical path length of the signal photons, or the optical path length of the idler photons when the idler photons are reflected by the measurement object part.