6002 results about "Quantum electrodynamics" patented technology

The present disclosure discloses a circularly polarized satellite antenna based on a magnetoelectric dipole. A floor is slotted, and an equivalent magnetoelectric dipole is excited using a grounded right-angle folded dipole, while two square parasitic patches are loaded to enhance a radiation performance, thus exciting a broadband high-gain circularly polarized radiation beam. The present disclosure utilizes the L-shaped right-angle folded dipole to simultaneously realize an ingenious combination of an electric dipole and a magnetic dipole, realizing a good circularly polarized radiation performance. At the same time, the present disclosure realizes circularly polarized radiation using a form of the magnetic dipole, which results in a stable pattern and a high gain.

The invention provides a molecular dynamics quantum variation simulation method and device.The molecular dynamics quantum variation simulation method comprises the steps that an initial quantum state of a target molecular system is measured to obtain a position basis vector set, then the position basis vector set and momentum basis vectors of the initial quantum state are used for constructing a parameterized quantum circuit, and the parameterized quantum circuit is obtained; and iteratively updating the parameters in the parameterized quantum circuit until the target evolution time is reached, thereby obtaining the final quantum state of the target molecular system. According to the method, a large-scale molecular simulation problem can be solved on a shallow quantum circuit, it is guaranteed that the circuit depth is only related to the Hamiltonian of a system and does not increase along with simulation time, and due to the fact that the depth of the quantum circuit is not related to evolution time, the quantum circuit depth can be improved. The method provided by the invention can be applied to simulating the processes of structural evolution, phase change and the like of the material under a long time scale.

The technology relates to enhancing performance of quantum sensor operation in a noisy environment. Quantum neural networks are used to pre- and post-process analog signals to which qubits of a quantum sensor are exposed. Intra-processing using additional quantum neural networks may also be employed. This approach filters out noise from both the input analog signal and the system itself to achieve a very high signal to noise ratio. This permits the system to detect induced dynamics associated during exposure of the qubits to the analog signals. This enables the quantum sensor to sense a change in a state of a system under test, which can be beneficial for areas such as imaging, magnetometry, sensing electric fields, optomechanical sensors, quantum radar and other areas where enhanced signal to noise ratios are desired.

In a general aspect, a quantum program can be automatically synthesized or compiled. In some implementations, a discretized state space is obtained. The discretized state space includes a plurality of states for one or more qubits of a quantum processor. A discrete action space is obtained. The discrete action space includes a plurality of unitary operations for the one or more qubits of the quantum processor. A policy that uses the discretized state space and the discrete action space to generate quantum programs for quantum state preparation is defined. A dynamic programming process is used to improve the policy. An initial state and a target state of the one or more qubits is identified. The policy is used to generate a quantum program to produce the target state from the initial state. The quantum program include a subset of the unitary operations in the discrete action space.

A method for quantum error correction includes: trapping and / or manipulating an array of qubits that include encoded neutral atoms or ions and forms a computational space; encoding the array of qubits to a state characterized in that an error during at least one of an idling, gate, or other operation results in a respective qubit transition to a disjointed state where that error can be detected without disturbing the qubits remaining in the computational space; performing a syndrome measurement of a quantum error correcting code; identifying the presence and location of an error by detecting the corresponding neutral atom or ion has left the computational space after performing the operation; identifying a logical error in the quantum error correcting code associated with a loss of qubit information based on the identified error location and results of the syndrome measurement; and adjusting subsequent computational steps based on the identified logical error.

Quantum Phased Array(s) of emitters and receivers that generate, modulate, emit, receive, and detect any quantum field. Quantum phased arrays include particle source(s) sourcing any quantum field, transmit modulator element(s) modulating any quantum observable and the associated quantum field, emitting elements radiating one or more quantum fields spatiotemporally, a propagation medium with one or more modulator elements for complete control of the quantum field, receiver(s) receiving one or more quantum fields, receive modulator element(s) modulating any quantum observable and the associated quantum field, detector(s) resolving one or more received quantum fields. Quantum metrology, communication and computing systems including quantum phased arrays are detailed for leveraging quantum field engineering functionality (complete control of one or more wavefunctions of one or more particles in any one or more orthonormal bases) of quantum phased arrays for quantum metrology, communication and computing applications.

The invention discloses a nut defect detection method based on X-ray imaging, and particularly relates to the field of X-ray nut material internal defect imaging, which comprises the following steps: generating and adjusting an initial light beam of X-rays through a synchronous radiation source, and constructing uniform irradiation field data for nut material detection; acquiring angle scattering light intensity matrix data based on the uniform irradiation field data; and performing phase inversion and sparse constraint optimization on the angle scattering light intensity matrix data to generate electron cloud density optimization distribution data, and constructing density connectivity relation graph data based on the electron cloud density optimization distribution data. By introducing a detection principle of combining high-coherence X-ray scattering imaging based on a synchronous radiation source and electron cloud density disturbance analysis, lossless identification of an early microcosmic physical deterioration region in a nut is realized; the problem that an existing method based on absorption imaging is insufficient in defect detection capacity under the background of weak density gradient and homogeneous component is solved.

The embodiment of the invention relates to a method for ion implantation simulation, electronic equipment and a storage medium. The method comprises: determining an initial position of each ion in an exposed surface of a simulated semiconductor device; determining first collision data generated by collision between specified reference ions in the ions and material atoms of the semiconductor device in the implantation process; determining second collision data of each other ion based on comparison of surrounding material information of the other ions in each ion and surrounding material information of the reference ion; and determining the distribution condition of each ion in the simulated semiconductor material based on the first collision data and the second collision data. According to the technical scheme, the calculation amount in the simulation ion implantation process can be effectively reduced, the calculation time is remarkably shortened, and the simulation efficiency is improved.

A hybrid quantum-classical (HQC) computer system, which includes a classical computer and a quantum computer, solves linear systems. The HQC computer system splits the linear system to be solved into subsystems that are small enough to be solved by the quantum computer, under control of the classical computer. The classical computer synthesizes the outputs of the quantum computer to generate the complete solution to the linear system.

The invention discloses a method and a model for generating a quantum state set, and the method comprises the following steps: adding depolarization noise to any target quantum state through a non-unitary forward process, and converting the target quantum state into a completely mixed state; and de-noising the complete mixed state by using a trainable reverse process, and recovering the complete mixed state to the target quantum state. According to the method, more stable convergence performance is achieved based on the convex optimization method, the pure state and the mixed state can be effectively generated, excellent fidelity is achieved, and the huge potential in the aspect of coping with complex quantum generation tasks is shown.

The invention relates to the technical field of quantum computing, and provides a polariton quantum computing simulation method and related device.The method comprises the steps that parameterized quantum circuits are generated based on micromodels used for describing polaritons for all to-be-computed excitation states respectively, and the parameterized quantum circuits are generated based on initial Hamiltonian of polaritons in a ground state; the target Hamiltonian amount of the polariton in the current excitation state is obtained, then the value of each parameter is adjusted at least once, and the target energy of the corresponding excitation state is obtained. In the primary adjustment process, parameter updating is carried out on the quantum circuit, a reference quantum state of the corresponding excitation state is obtained by utilizing the updated quantum circuit, reference energy of the corresponding excitation state is obtained based on the reference quantum state and in combination with the target Hamiltonian, and then when a set convergence condition is met, the target Hamiltonian is obtained. And taking the reference energy as target energy of the corresponding excited state. The polaritons are simulated through the quantum computer, and the simulation efficiency is improved.

A quantum computing service provides a quantum algorithm development kit that enables a customer to define a quantum task, a quantum algorithm, or a quantum circuit using an intermediate representation. The quantum computing service is then configured to automatically translate the quantum task, quantum algorithm, or quantum circuit into a specific representation specific to a particular quantum computing technology selected by the customer to be used to execute the customer's quantum task, quantum algorithm, or quantum circuit.

The invention discloses a point light source electron accelerator which comprises a sealing box body, a cathode, a laser emitter, a reflecting cover, a grid plate and a mounting plate, the mounting plate is erected in the sealing box body, a mounting hole is formed in the mounting plate, the cathode is mounted in the mounting hole, and the laser emitter is arranged in the sealing box body. The reflecting cover is arranged at the top of the mounting hole; the reflecting cover is a semi-spherical surface, a laser through hole is formed in the top of the semi-spherical surface, and the laser through hole is coaxial with the cathode; the transmitting end of the laser transmitter is aligned with the cathode; the grid plate is mounted below the mounting plate and is aligned with the mounting holes; and an electron outlet is formed below the grid plate. The invention provides a point light source electron accelerator, and the point light source electron accelerator provides a light and miniaturized electron accelerator design, so that the application field of the accelerator is wider.

The invention discloses an ion control method and device, an ion trap system and a related device, and belongs to the technical field of quantum information. A plurality of ions in the ion trap system are in a magnetic field with a magnetic field gradient, the magnetic field gradient enables transition frequencies of the plurality of ions to be different, and each ion is of a multi-energy-level structure. The method comprises the steps that according to the transition frequency of a plurality of first ions, the energy level of the first ions is adjusted so that the first ions irrelevant to quantum control can be transferred from a calculation space to an auxiliary space, and the energy level of the ions in the calculation space is different from the energy level of the ions in the auxiliary space; and performing quantum manipulation on the plurality of second ions in the calculation space to form a plurality of quantum bits. According to the scheme, light finding of ions is not needed, light finding of ions is not needed, multi-ion control can be achieved through global laser or microwaves, and implementation is easy. And moreover, multi-ion control can be realized by using a relatively small magnetic field gradient, and the ion control threshold is reduced.

The invention provides a nonlinear data generation and processing method based on light quantum and a light quantum computer, and the method comprises the steps: obtaining a nonlinear function and attribute information of a nonlinear layer; according to the frequency spectrum number and the attribute information of the nonlinear function, constructing an initial light quantum circuit; measuring the initial light quantum circuit, and determining a target function corresponding to the initial light quantum circuit according to a measurement result; loss information of the target function is determined, whether the initial light quantum circuit is applied or not is determined according to the loss information, and if yes, the initial light quantum circuit serves as a target light quantum circuit; and performing operation on input data of the nonlinear layer based on the target light quantum circuit. According to the method, the low-energy-consumption characteristic of photon calculation, the nonlinear characteristic of light quantum calculation and the general programmable capability of electronic calculation can be fused, and high-energy-efficiency calculation can be carried out on input data of a nonlinear layer. In addition, the method also has the advantages that the complexity of a quantum circuit is smaller, and the participation of a nonlinear optical device is not needed.

A multirail-encoded qubit can be implemented using a quantum system having a state space that includes a number M of distinct modes, where M is an integer greater than 2. The M modes are logically partitioned into two disjoint subsets (or “bands”), with each mode assigned to exactly one of the bands. The multirail encoding is defined such that a state in which any one of the modes in the first band is occupied and all modes in the second band are unoccupied maps to a logical 0 state of the qubit, and a state in which any one of the modes in the second band is occupied and all modes of the first band are unoccupied maps to a logical 1 state. Systems and methods for generating, measuring, and operating on multirail-encoded qubits are disclosed.

Aspects of the present disclosure may include a method and / or a system for identifying an ion chain having a plurality of trapped ions, selecting at least two non-consecutive trapped ions in the ion chain for implementing a qubit, applying at least a first Raman beam to shuttle at least one neighbor ion of the at least two non-consecutive trapped ions from a ground state to a metastable state, and applying at least a second Raman beam to one or more of the at least two non-consecutive trapped ions, after shuttling the at least one neighbor ion to the metastable state, to transition from a first manifold to a second manifold.

The invention discloses a method for improving fusion plasma ion cyclotron heating efficiency, and belongs to the technical field of magnetic confinement fusion. The method comprises coupling use of an ion cyclotron antenna and a helical wave antenna, the ion cyclotron antenna is installed in a Tokamak vacuum chamber, is connected with an external radio frequency power supply through a coaxial line, and is used for exciting an ion cyclotron frequency band electromagnetic wave to heat plasma; and the helical wave antenna is arranged at a Tokamak window adjacent to the ion cyclotron antenna, is connected with a radio frequency power supply through a coaxial line or a rectangular waveguide, and is used for exciting a helical wave to increase the plasma density of a scraping layer and improve the accessibility of the ion cyclotron wave. The plasma is excited through the spiral wave antenna, so that the density of the scraping layer is improved, the coupling efficiency of the ion cyclotron wave and the plasma is improved, and technical support is provided for application of ion cyclotron heating in future high-parameter Tokamak.

The invention provides a motion simulation method and system for charged particles in a magnetic field, and the method comprises the steps: substituting the magnetic vector potential of an electromagnetic field where the charged particles are located into an established kinetic equation, solving the kinetic equation, and obtaining the motion trail of the charged particles; the kinetic equation is a Hamiltonian equation corrected by a narrow relativistic added with Lorentz force. The method has the advantages that a more comprehensive simulation method for the movement of the charged particles in the electromagnetic field is constructed, a simulation model based on energy conservation is considered, the divergence behavior of long-period prediction of a simulation system is improved, and long-period and high-precision simulation of the high-speed charged particles in the earth magnetic field is achieved.

The invention relates to a method and a device (100) for generating a useful signal (11) from a signal (5') emanating from a spin-based quantum system (4), comprising exciting the spin-based quantum system (4) by an electromagnetic field (3) which oscillates between two states at a modulation frequency, detecting the signal (5') emanating from the spin-based quantum system (4) to obtain a measurement signal (7), multiplying the measurement signal (7) with a modulation signal (9) which oscillates between two modulation signal states at the modulation frequency to generate a modulated measurement signal (7'), and demodulating the modulated measurement signal (7') to generate the useful signal (11).

Method for operating a quantum computing element (1) with a network (2) of shuttling lanes (4) having multiple junctions (5) and multiple manipulation zones (7), wherein the method respectively comprises for a plurality of spin qubits (9):a) initializing the qubit (9),b) manipulating the qubit (9) in at least one of the manipulation zones (7),c) reading out the qubit (9),wherein at least one of the qubits (9) is shuttled along the network (2) of the shuttling lanes (4) between steps a) and c) so as to pass at least four different of the junctions (5).

The invention discloses a defect-free neutral atom array preparation method and system based on dynamic optical tweezers rearrangement, and belongs to the technical field of quantum computing. The invention discloses a defect-free neutral atom array preparation method and system based on dynamic optical tweezers rearrangement. A static optical tweezers array is generated through a spatial light modulator to capture initial atoms, an optimal rearrangement path is planned by adopting a Hungary algorithm, and dynamic optical tweezers are generated through an acousto-optic deflector to implement atom grabbing, moving and releasing operation. According to the method, a weighted Gerchberg-Saxton algorithm is innovatively combined with real-time image feedback, so that the precise rearrangement of the atom array is realized. Important experimental technical support is provided for quantum calculation and simulation, and the application progress of the neutral atom array in the fields of quantum error correction, fault-tolerant quantum calculation, quantum simulation and the like is effectively promoted.

The invention discloses a beam four-dimensional emittance measuring instrument and measuring method based on an orthogonal slit, and the method comprises the steps: enabling a charged particle beam to enter a slit assembly from one side, far away from a second slit plate, of a first slit plate, and enabling the charged particle beam to form a first beam cluster to the second slit plate after the charged particle beam is transmitted through the first slit; the first beam group is transmitted by the second slit to form a second beam group to the fluorescence acquisition assembly; the fluorescence acquisition assembly comprises a fluorescent screen and an image acquisition module, the fluorescent screen is used for receiving the second beam group and generating fluorescence, the image acquisition module is used for acquiring a fluorescence pattern emitted by the fluorescent screen bombarded by the second beam group, and the data processing assembly is used for calculating phase space distribution of beams according to the fluorescence image. And measuring the emittance of the charged particle beam according to the phase space distribution. According to the beam four-dimensional emittance measuring instrument provided by the invention, the beam is segmented through the slits in the orthogonal direction, so that more complete four-dimensional phase space distribution can be obtained, and the measurement integrity and precision of the beam emittance are improved.

A method for secure quantum communication includes generating a photon. The method includes modulating at least two quantum state dimensions selected from the group consisting of orbital angular momentum (OAM), polarization, and phase of the photon to form a composite quantum state. The method includes directing the photon to an emission point on a helical structure having a defined spatial coordinate corresponding to classical data. The method includes emitting the photon from the emission point into a quantum channel. The composite quantum state and spatial coordinate together encode secure information.

An x-ray source includes an x-ray transmissive window having an x-ray transmittance greater than or equal to 20% for at least some x-rays having an x-ray energy less than 1 keV. The x-ray source further includes an electron source configured to generate at least one electron beam and an anode assembly configured to generate x-rays in response to electron bombardment by at least some of the electrons of the at least one electron beam from the electron source. The x-ray source further includes at least one x-ray optic is configured to receive at least some of the x-rays from the anode assembly and to direct at least some of the received x-rays to the window to form an x-ray beam.

The invention belongs to the technical field of multistable structures, and particularly relates to a multistable-based repeatable energy absorption structure. The cell comprises a unit cell, the inner-layer bistable energy absorption structure model comprises a bistable unit body; the outer-layer bistable-state energy absorption structure model is arranged on the outer side of the inner-layer bistable-state energy absorption structure model in a sleeving manner; the outer-layer bistable energy absorption structure model comprises a bistable unit body; the two ends of each half bistable unit are connected to the inner-layer bistable energy absorption structure model and the outer-layer bistable energy absorption structure model respectively; according to the invention, the outer-layer bistable-state energy absorption structure model and the inner-layer bistable-state energy absorption structure model which are enclosed by a plurality of unit cells are mutually sleeved to form the repeatable energy absorption structure, and the outer-layer bistable-state energy absorption structure model and the inner-layer bistable-state energy absorption structure model are connected through the semi-bistable-state unit; and the repeatable energy absorption structure is subjected to buckling jump under the action of an impact load, so that the energy absorption characteristic and the impact resistance of the repeatable energy absorption structure are remarkably improved.

An all-to-all coupled, high-fidelity, error-correctable quantum computer can scale to hundreds of qubits within a single cavity of moderate cooperativity with existing neutral atom technology. This quantum processor can enact teleported gates among any pair of qubits using a local Rydberg interaction between each qubit and a separate network of atoms that distribute entanglement via a cavity mode. Small atomic ensembles at network nodes allow for ultrafast, nondestructive readout with high fidelity by substantially shifting the resonance of even a poor-quality cavity. Fast readout enables near-deterministic entanglement distribution among network atoms despite cavity losses as well as syndrome measurements of qubit atoms for error correction.

The invention discloses an optimizer design method and device using a quantum tunneling effect and a medium, and relates to the technical field of computer science and technology and quantum information. The method comprises the following steps: converting an optimization problem into a quantum state through mathematical modeling; iterative optimization of the quantum state is realized through a parameterized quantum circuit, and a quantum tunneling effect mechanism is introduced, so that a local optimal solution is jumped out; after each quantum state evolution, evaluating the quality of a current solution by observing a target function value; a self-adaptive multi-layer optimization strategy is introduced, and the learning rate of parameters is adjusted to gradually converge to a global optimal quantity, so that the capabilities of global search and local optimization are balanced; after the quantum circuit is optimized, an observation value is measured and extracted, and a globally optimal solution is determined according to the observation value. The quantum circuit and the tunneling mechanism are introduced into hardware design, the fast jumping function is achieved through the tunneling phenomenon, the optimization performance can be improved, and a more efficient solution is provided for hardware acceleration.

The invention provides a cold atom gravity measurement method and device based on entangled state enhancement, and belongs to the technical field of cold atom gravity measurement, and the method comprises the steps: carrying out the excitation of a nonlinear crystal, obtaining an entangled photon pair, and enabling the entangled photon pair to comprise a first photon and a second photon in an entangled state; laser parameters of an area where a cold atomic group is located are controlled, the first photons are coupled into the cold atomic group, and a plurality of cold atoms in an entangled state are obtained; and placing the plurality of cold atoms in the entangled state in a gravity field, measuring the phase difference of the cold atoms under the action of the gravity field, and determining a gravity measurement result based on the phase difference. According to the invention, entangled photons are introduced to be coupled with cold atoms, so that the measurement limit is improved to the Heisenberg limit, and higher-precision gravity measurement is realized.

The invention discloses a miniature microwave electric field intensity measurement method based on Rydberg atoms, and belongs to the field of microwave electric field measurement. The implementation method comprises the following steps: scanning through an alkali metal atom gas chamber by using first probe light, scanning through the alkali metal atom gas chamber by using first coupling light, radiating a microwave electric field to be detected to the alkali metal atom gas chamber, obtaining an EIT-AT split spectrum, and obtaining the microwave electric field to be detected; if the EIT-AT splitting spacing is not available, a local oscillation microwave electric field can be radiated to the alkali metal atom gas chamber at the same time, a microwave electric field to be measured is obtained through an atom superheterodyne method, and rapid measurement of the intensity of the miniaturized microwave electric field based on Rydberg atoms is achieved. The device for realizing the method comprises a first laser, a first dichroscope, an alkali metal atom gas chamber, a second laser, a second dichroscope, a photoelectric detector, a first standard gain horn antenna and a second standard gain horn antenna. Frequency locking does not need to be carried out on detection light and coupling light, light path devices can be reduced, and the application range is wide.