235 results about "Energy level" patented technology

The invention discloses a method and a system for determining the reaction activity of material molecules based on quantum computing, and relates to the technical field of material performance analysis based on quantum computing, and the method comprises the following steps: generating UCCSD (Unified Conduction Cathode Spectroscopy) simulation according to an electronic structure of molecules of a target material; obtaining at least one effective excitation operator based on parameters in the coefficient of each excitation operator in UCCSD simulation and by combining all the excitation operators; constructing a quantum circuit according to all the effective excitation operators; determining energy level distribution of molecules of the target material based on the quantum circuit; and determining the reaction activity of the molecules of the target material according to the energy level distribution of the molecules of the target material. According to the method, in the process of obtaining the effective excitation operator, an ADAPT-VQE algorithm does not need to be executed, so that the analysis cost of the physical and chemical properties of the material can be reduced, and the analysis efficiency of the physical and chemical properties of the material can also be improved.

The invention discloses a Rydberg atom microwave measurement sensitivity improving method based on atom velocity selection, and relates to the field of Rydberg atom microwave measurement, and the method comprises the steps: moving the frequency of probe light to an energy level resonance transition position of cesium atoms from a ground state to an excited state, scanning the frequency of the coupled light within a Rydberg state energy level preset range, and observing an EIT signal; the frequency of the detection light is changed, the detuning amount of the detection light is selected to enable the EIT signal to reach the maximum, and the frequency of the detection light is locked to the frequency corresponding to the maximum position of the EIT signal; meanwhile, a local oscillation field signal generator in the Rydberg atomic microwave sensitivity measurement device is turned on, and corresponding EIT-AT splitting is generated; the frequency of the coupling light is locked to the coupling light laser frequency corresponding to the lowest point of EIT-AT splitting, and the Rydberg atom microwave measurement sensitivity reaches the maximum. The cesium atom speed is screened and controlled, and the signal-to-noise ratio of the measurement signal is improved, so that the measurement sensitivity is improved.

Systems and methods for determining a target multi-source model of a radiation source corresponding to an energy spectrum is provided. The systems may obtain an initial multi-source model of the radiation source, which includes an initial phase space file that includes information of a plurality of simulated particles of a plurality of energy levels. The systems may estimate, based on the initial phase space file, a plurality of component PDD curves corresponding to the plurality of energy levels. The systems may obtain a measured PDD curve corresponding to radiation of the energy spectrum. For each energy level, the systems may determine, based on the plurality of component PDD curves and the measured PDD curve, a weight for the each energy level. The systems may further determine the target multi-source model of the radiation source based at least in part on the initial multi-source model and the weights.

The invention relates to the technical field of spectrum detection and optical imaging, and provides a time domain stimulated Raman scattering method and system.The method comprises the steps that pumping pulses or Stokes pulses are modulated, two stimulated Raman excitation pulse pairs with adjustable relative delay are introduced, a to-be-detected sample is excited to generate transient stimulated Raman scattering, and the time domain stimulated Raman scattering is obtained; transient stimulated Raman scattering signals can be obtained, acquisition of hyperspectral data covering hundreds of wave numbers can be achieved only through single excitation, and the method has the advantage of being high in time resolution. Meanwhile, the spectral resolution of the vibration level life broadening limit can be obtained through the method, and the main technical bottleneck faced by the traditional stimulated Raman scattering spectrum technology can be solved at a time. The method can be applied to the fields of Raman scattering imaging, spectrum detection, related Raman probes and the like.

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.

To provide a cold fusion device which offers a practical output level.SOLUTION: A capacitor consisting of a hydrogen-containing metal, which serves as a cold fusion target, and an opposing electrode is subjected to LC resonance, and the hydrogen-containing metal is irradiated with electrons with an energy level of 0.78 MeV or greater, generated in the capacitor, to promote nuclear fusion.SELECTED DRAWING: Figure 1

The invention discloses a microwave electric field measurement method and device based on Rydberg atom Rabian resonance, and the key point of the technical scheme is that the microwave electric field measurement device comprises an alkali metal atom gas chamber, a static magnetic field generation device, detection light, coupling light, a dichroscope, a photoelectric detector, an arbitrary waveform generator (AWG) and a horn antenna; sinusoidal phase modulation is applied to the microwave, the modulation frequency is variable, the Labir frequency of the microwave to be measured is obtained through a Labir resonance curve by utilizing Labir resonance generated between the phase modulation microwave and the three-energy-level Rydberg atoms, finally the electric field intensity of the microwave to be measured can be obtained through a microwave electric field intensity traceability formula, and under the action of a static magnetic field, the electric field intensity of the microwave to be measured can be measured. And the degeneracy of the atomic hyperfine energy level is destroyed, so that the measurement result is more accurate, and the measurement frequency band is wider. Moreover, the method can achieve the self-calibration measurement of the microwave electric field, and enables the magnitude of the amplitude of the electric field to be directly traced to the international unit system (SI system).

The invention discloses a short-path optical pulse based on a three-energy-level system, a generation method and application. Specific forms of Hamiltonian and Rabian frequency parameters thereof are constructed in a three-level quantum system, and the parameters are optimized to obtain a light pulse which enables an evolution path of a quantum state on a Bloch sphere to be shortest and is high in fidelity. According to the optical pulse obtained by the technical scheme, the quantum state can be changed into a target state from any initial state through a circular evolution path, and logic gate operation is executed. The evolution time of the gate can be effectively shortened through the circular evolution trajectory, and the quantum gate reduces the influence of environmental noise while keeping the robustness of the control error. According to the quantum logic gate, multi-parameter optimization is carried out on the optical pulse waveform, the quantum logic gate is suitable for a rare earth ion Pr < 3 + >: Y2SiO5 quantum bit system device and an inverted-V-shaped three-energy-level system, and the high-fidelity quantum logic gate is obtained.

The invention provides a method for detecting furfural in insulating oil based on terahertz time-domain spectroscopy, and relates to the technical field of aging detection of insulating oil of electrical equipment, and the method comprises the following steps: determining the content of furfural in insulating oil in different aging states through a chromatographic analysis method, and preparing samples with corresponding concentrations; the method comprises the following steps: scanning a sample by using a transmission-type terahertz time-domain spectroscopy system according to liquid characteristics and terahertz spectral characteristics of the insulating oil to obtain time-domain spectral data of the sample; adopting a quantum chemistry simulation method to simulate absorption and reflection characteristics of furfural molecules in a terahertz frequency band, and matching a vibration mode, a rotation energy level and terahertz wave band absorption characteristics in a real spectral signal; and the content of furfural in the insulating oil is quantitatively detected by reconstructing the terahertz time-domain signal. According to the method, rapid and non-contact detection of trace furfural in the insulating oil is realized by analyzing the terahertz spectrum characteristics, and an effective evaluation means is provided for the insulation aging degree of the transformer.

The invention provides a Rydberg atom microwave detection system and method based on entangled light noise reduction, and relates to the technical field of microwave quantum. The method comprises the steps that idler frequency light and probe light with entanglement characteristics are generated, the probe light excites Rydberg atoms from a ground state to an excited state, and the idler frequency light is used for carrying noise information; the idle frequency light and the detection light are reflected into an atomic gas chamber in a non-coaxial mode, the coupling light is reflected into the atomic gas chamber, and Rydberg atoms are excited to a Rydberg first energy level from an excited state; microwaves carrying microwave information are emitted into the atom gas chamber, the microwaves are used for exciting Rydberg atoms from the first Rydberg energy level to the second Rydberg energy level so that the detection light can carry the microwave information, and finally the idler frequency light and the detection light enter the detection device so that noise information can be filtered out, and the detected microwave information can be obtained. According to the invention, loss of entanglement characteristics of the two beams of light can be effectively avoided, Rydberg atom microwave detection based on entangled light is realized, and the sensitivity of Rydberg atom microwave detection is improved.

The invention belongs to the technical field of radio frequency electromagnetic field measurement, and particularly discloses a quantum field intensity measurement method and system regulated and controlled by an offset electric field, and the method comprises the steps: selecting a Rydberg atomic energy level close to resonance according to the microwave frequency of a measured signal; according to the energy level of the Rydberg atom, determining the wavelength of coupled light and preparing the Rydberg atom, meanwhile, obtaining the difference value between the microwave frequency and the resonance transition frequency of the measured signal, and obtaining the energy level offset according to the difference value; acquiring the polarizability of the Rydberg atomic energy level, and acquiring a to-be-applied offset electric field value according to the energy level offset and the polarizability; according to the offset electric field value, an offset electric field is started, so that the related energy level of the Rydberg atoms moves in the offset electric field, when the energy difference between the offset Rydberg energy level and the adjacent energy level resonates with the microwave frequency of the measured signal, the offset sub-energy level forms energy level splitting and generates frequency splitting, and the frequency splitting is generated; and the electric field of the measured signal is measured according to the interval between the frequency splitting.

The invention relates to the field of nano photonics and optical materials, in particular to an exciton state energy level detection method based on a plasmon enhanced nonlinear spectrum, which comprises the following steps: constructing a mixed nano cavity structure in which a single-layer two-dimensional material is coupled with a plasmon cavity; collecting a two-photon photoluminescence spectrum, a second harmonic spectrum and a third harmonic spectrum of the single-layer two-dimensional material in the mixed nanocavity structure; the intensity of a nonlinear optical signal is improved through a local enhancement effect of plasmons; according to the two-photon photoluminescence spectrum, the second harmonic spectrum and the third harmonic spectrum of the single-layer two-dimensional material, the dark exciton state energy level, the bright state energy level, the dark exciton state energy level and the high-energy exciton state energy level of the single-layer two-dimensional material are determined. According to the method, the energy level of the Rydberg exciton state of the semiconductor material with the nanoscale thickness can be accurately detected.

The invention provides a partial discharge detection system based on a Rydberg atom quantum coherence effect, and the system comprises an optical excitation module which is used for transmitting two-photon laser to excite hot atoms to enter a Rydberg state; the atomic gas chamber is used for accommodating hot atoms and is coupled with an electromagnetic field generated by the partial discharge signal, so that the hot atoms generate energy level response change under the action of the electromagnetic field; the detection light path module is used for detecting a change signal of light signal intensity in the atomic gas chamber and converting the change signal into an electromagnetic response characteristic of an electromagnetic field; the signal acquisition and processing module is used for receiving the electromagnetic response characteristics, demodulating and analyzing the electromagnetic response characteristics and extracting characteristic parameters of the partial discharge signals; and the control and calibration module is used for receiving the characteristic parameters of the partial discharge signal, performing calibration based on an energy level frequency shift rule of Rydberg atoms, and outputting electric field intensity subjected to quantization calibration. The system can realize high-sensitivity, anti-interference and traceable detection of weak partial discharge signals.

The invention discloses a time-resolved LIBS (laser-induced breakdown spectroscopy) system and a sample component analysis method and product thereof, and relates to the field of laser-induced breakdown spectroscopy. After the sample is irradiated by the ablation laser, plasma is generated; in the plasma expansion and cooling process, excited state atoms and ions are subjected to energy level transition, and a characteristic radiation spectrum is released; the delay control module sets different delay time so as to control the working time interval of the laser generator and the spectrograph; the spectrograph receives the characteristic radiation spectrums at different delay times by using an optical fiber probe, stimulates the characteristic radiation spectrums at the integration time, and determines characteristic radiation spectral lines of different elements; and the computer analyzes the characteristic radiation spectral lines, determines spectral line intensities of different elements, and determines a component result of the sample in combination with the calibrated spectral line intensities and the element content function curve so as to improve the accuracy of the component result of the sample.

The invention discloses a compound and a preparation method thereof and an electronic device, the molecular structure general formula of the compound is shown in the specification, R is selected from one of the following structures, X1-X2 are respectively and independently selected from one of oxygen atoms, sulfur atoms, selenium atoms and nitrogen atoms, and X is a positive integer. X < 3 > to X < 4 > are respectively and independently selected from one of the following structures; and X < 5 > to X < 6 > are respectively and independently selected from any one of alkyl groups. According to the compound provided by the invention, the electron pushing and pulling capability in the compound is adjusted by changing the structures of a donor and an acceptor, so that the purpose of regulating and controlling molecular electron cloud distribution and energy level is achieved, and key physical properties such as emission wavelength, radiative transition rate (kr) and backlash crossing rate (kRISC) of a material are systematically regulated and controlled. The compound as a guest material of a luminescent layer has good comprehensive performance when being applied to organic electroluminescent devices for solution processing and vacuum evaporation.

Systems and methods of imaging a sample using a charged-particle beam apparatus are disclosed. The charged-particle beam apparatus may include a charged-particle source configured to generate primary charged particles, the primary charged particles forming a primary charged-particle beam along a primary optical axis, and a charged-particle detector comprising a plurality of con-centric segments of a charged-particle sensitive material configured to detect charged particles emitting from a sample after interaction of the primary charged-particle beam with the sample, wherein each segment of the plurality of concentric segments is configured to collect the emitted charged particles having a range of energy levels and a dominant energy level.

The invention provides a quantum dot light source and a preparation method thereof. The quantum dot light source can be applied to the technical field of semiconductors and quantum information. The quantum dot light source comprises a first doping layer, a quantum dot layer, a barrier layer, an energy level matching layer and a second doping layer which are sequentially stacked, the first doping layer is used for providing holes under electrical excitation; the quantum dot layer comprises a plurality of quantum dots, and the quantum dots are used for emitting fluorescence when holes from the first doped layer and electrons which are from the second doped layer and pass through the barrier layer are compounded in the quantum dots; the barrier layer is used for preventing holes from the quantum dot layer from passing through under electrical excitation and enabling electrons which come from the energy level matching layer and have energy equal to preset energy to pass through; the energy level matching layer is used for adjusting the energy of the electrons from the second doping layer to preset energy under electrical excitation; and the second doping layer is used for providing electrons under electrical excitation.

The invention provides a quantum state preparation method of a continuous cold cesium atom beam, and relates to the field of cold atom physics and quantum frequency standards. According to the method, an external magnetic field is arranged in a quantum state preparation area, when an atomic beam penetrates through the preparation area, the atomic beam interacts with two beams of orthogonal laser at the same time, and therefore quantum state preparation is completed. The first laser beam is unpolarized, and the frequency of the first laser beam is locked on a cesium atom D2 line F = 4gt; f '= 3gt; on the transition frequency, the frequency of the second laser beam is locked on the cesium atom D2 line F = 3gt; f '= 3gt; in the transition frequency, the polarization direction is parallel to the direction of the external magnetic field. The cesium atoms are pumped to the energy level F = 3 through the first laser beam, the cesium atoms are prepared to the energy level F = 3 through the second laser beam, and m = 0gt; and quantum states. A reflector is arranged in the incident direction of each beam of laser, and incident light returns along the same path to form correlation, so that scattering force in two directions is balanced, a one-dimensional optical cohesive group is formed to cool atoms again, and stability of cold atom beams is guaranteed.

This provides a structure that exhibits a high degree of balance between durability, conductivity, and quantum efficiency. [Solution] A layered structure comprising a substrate and a high-density particle layer on the substrate, wherein the high-density particle layer contains nanoparticles with an inorganic film formed on its surface, the nanoparticles having a particle size of 1 nm to 50 nm, the high-density particle layer having a packing density of nanoparticles per unit volume of 30 vol% to 80 vol%, the inorganic film having a thickness of 0.1 nm to 5 nm, the energy level at the upper end of the valence band of the inorganic film being the same as or lower than the energy level at the upper end of the valence band of the nanoparticles, and the energy level at the lower end of the conduction band of the inorganic film being the same as or higher than the energy level at the lower end of the conduction band of the nanoparticles.

Systems and methods of imaging a sample using a charged-particle beam apparatus are disclosed. The charged-particle beam apparatus may comprise an energy discrimination device configured to filter incoming signal charged-particles having a plurality of ranges of energy levels. The energy discrimination device may include an electromagnetic charged-particle deflector configured to deflect a path of the incoming signal charged-particles based on an energy level of the incoming signal charged-particles; an aperture formed on an aperture plane, the aperture configured to allow a portion of the incoming signal charged-particles exiting the electromagnetic charged-particle deflector to pass through based on the deflection; and a control lens located upstream from the electromagnetic charged-particle deflector and configured to focus the incoming signal charged-particles on the aperture plane.

The invention provides an optical resonant cavity enhanced high-sensitivity microwave receiving system and method. The system comprises a first laser, an atomic gas chamber, an optical resonant cavity, a second laser, a photoelectric detector and an upper computer, the atomic gas chamber is arranged in a microwave field to be measured, the optical resonant cavity comprises a first reflecting mirror and a second reflecting mirror which are arranged on the two opposite sides of the atomic gas chamber, probe light generated by the first laser is transmitted in the atomic gas chamber in an oscillation mode under the reflecting action of the first reflecting mirror and the second reflecting mirror, and positive feedback is formed; the probe light excites atoms in the atomic gas chamber from a ground state energy level to a metastable state energy level, and the coupling light generated by the second laser excites the atoms from the metastable state energy level to a Rydberg energy level; the photoelectric detector is used for detecting the detection light output from the optical resonant cavity, and the upper computer is used for calculating field intensity information of the microwave field to be detected based on a detection result. By adopting the microwave receiving system provided by the invention, the number of atoms interacting with probe light can be increased, and the microwave receiving performance is improved.

The invention discloses a gas detection device and method based on absorbed electron energy, and belongs to the technical field of gas sensing and detection. According to the method, electrons emitted by an electron emission source enter a gas chamber containing mixed gas to be detected, the gas absorbs the electrons with specific energy, particles at a lower energy level jump to an upper energy level, the absorbed specific electron energy is used for marking the gas, and the gas concentration is reversely deduced according to the energy variation. The method has the remarkable advantages that the electron energy is used for exciting the gas to complete the transition of the gas energy level, different energy electrons emitted by the electron emission source have continuity, the change of the current representation number corresponds to the change of the electron energy absorbed by the gas, and the gas is distinguished according to the difference of the absorbed electron energy.

A computer implemented method (200) comprising selecting one or more pairs of energy levels of an isotope of an ion for a qubit for a quantum computer, wherein each of the one or more pairs of energy levels comprises a first metastable state and a second metastable state.

The application discloses a crude oil water content analysis method and device. The method comprises the following steps: obtaining low, medium and high energy level light quantum detection data of a penetrating crude oil sample; calculating photoelectric effect cross section coefficients of low and medium energy levels, simultaneously solving oil, gas and water phase fractions and calculating a first mixed density; combining Compton reaction cross section coefficient of high energy level data to calculate a second mixed density; comparing the deviation of the two mixed densities, if the deviation is greater than a preset threshold, the detection time is automatically extended for re-measurement; if the deviation is still greater than the preset threshold, it is determined that the sample is in a gas-containing or non-full-liquid state, the high energy level calculation result is actively removed, and only the low and medium energy level data are used to solve the phase fraction and normalized output the final water content. The application innovatively introduces a density deviation check and a dynamic delay mechanism, effectively distinguishes and separates the gas phase interference, and realizes non-contact and high-precision automatic water content detection.

Systems and methods for imaging a sample using a charged particle beam device are disclosed. The charged particle beam apparatus may include: a charged particle source configured to generate primary charged particles, the primary charged particles forming a primary charged particle beam along a primary optical axis; and a charged particle detector comprising a plurality of concentric segments of charged particle sensitive material, the plurality of concentric segments configured to detect charged particles emitted from the sample after the primary charged particle beam interacts with the sample, wherein each segment of the plurality of concentric segments is configured to collect the emitted charged particles having a range of energy levels and a primary energy level.

The invention belongs to the technical field of fluorescence detection, and particularly relates to a method for detecting trace water in an organic solvent. In the invention, the sodium erbium tetrafluoride serving as the probe can emit light under the irradiation of exciting light, and the detection of trace water in an organic solvent can be realized through the change of the intensity ratio of two specific light-emitting peaks along with the water content by utilizing the difference of the multi-phonon relaxation probability influence degrees of water molecules on the light-emitting energy levels of all excited states of erbium ions. The trace water detection nanoprobe adopted by the invention is non-toxic, stable in photochemical property, strong in anti-interference capability, easy to store, high in detection sensitivity and simple to operate, and is expected to be used in the fields of industrial production, drug synthesis, food processing, environmental monitoring and the like.

This invention discloses a quantum cascade laser and its fabrication method, relating to the field of laser technology. The quantum cascade laser includes a substrate layer; a lower waveguide layer located on the substrate layer; an active layer located on the lower waveguide layer and including multiple injection layers located on the lower waveguide layer; and multiple light-emitting layers, wherein electrons in the light-emitting layers transition from high energy levels to low energy levels, suitable for exciting electrons to generate excitation light; wherein the light-emitting layers and injection layers are periodically stacked in an alternating cascade structure, each injection layer extracts low-energy electrons from the adjacent light-emitting layer above the injection layer and transports the low-energy electrons to the light-emitting layer of the previous period adjacent to the injection layer to form high-energy electrons, thereby transporting electrons between light-emitting layers belonging to two adjacent periods; and an upper waveguide layer located on the light-emitting layers, which can achieve a highly concentrated number of high-energy electrons, thereby realizing a large-scale, high-power quantum cascade laser.

The application belongs to the technical field of radio frequency electromagnetic field measurement, and particularly discloses a quantum field intensity measurement method and system of offset electric field regulation, which comprises the following steps: selecting a Rydberg atomic energy level close to resonance according to the microwave frequency of a measured signal; determining a coupling light wavelength according to the Rydberg atomic energy level, preparing a Rydberg atom, simultaneously obtaining a difference value between the microwave frequency of the measured signal and a resonance transition frequency, and obtaining an energy level offset value according to the difference value; obtaining a polarizability of the Rydberg atomic energy level, obtaining an offset electric field value to be applied according to the energy level offset value and the polarizability; and starting the offset electric field according to the offset electric field value, so that the relevant energy level of the Rydberg atom produces a movement in the offset electric field; when the energy difference between the offset Rydberg energy level and the adjacent energy level resonates with the microwave frequency of the measured signal, the offset sub-energy level forms an energy level splitting, and a frequency splitting is generated, and the electric field of the measured signal is measured according to the interval between the frequency splittings.

The invention relates to an organic compound, an organic light-emitting device and a display panel. The organic compound has a structural formula as shown in a formula (1): # imgabs0 #. The conjugate length and electron distribution of molecules are effectively adjusted in a nitrogen atom para-position connection mode, so that a higher first singlet excited state energy level is favorably formed, the structure is also favorable for constructing good coplanarity, and a higher glass transition temperature is further realized; in addition, a benzene ring of the phthalimide is easy to introduce a plurality of functional groups, which is beneficial for obtaining a lower refractive index; when a film layer formed by the organic compound and a high-refractive-index film layer are combined to form a covering layer, and the covering layer is applied to the organic light-emitting device, the light-emitting efficiency and the color purity of the organic light-emitting device can be remarkably improved.

Organic emissive devices are provided that include host structures with electron and / or hole transporting components having specific energy levels that promote good charge balance and enhanced charge capture. The disclosed energy level structures provide host systems that reduce exciplex formation and thereby promote improved device internal quantum efficiency and stability, or which intentionally include exciplex formation so as to modify the average orientation of the dipole.