74 results about "Excited state" patented technology

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.

Techniques are provided for performing an optically heralded entanglement process to entangle states of a first data quantum bit and a second data quantum bit into an entangled state of computational basis states comprising a ground state and a first excited state. An optically heralded entanglement process comprises performing a first optically heralded entanglement process to determine whether the entangled state of the first data quantum bit and the second data quantum bit excludes a state in which both the first data quantum bit and the second data quantum bit can be in the ground state, and performing a second optically heralded entanglement process to determine whether the entangled state of the first data quantum bit and the second data quantum bit excludes a state in which both the first data quantum bit and the second data quantum bit can be in the first excited state.

A molecular-spin qubit includes a molecular color center having a ground state and an excited state. The ground state has non-zero spin with at least first and second sublevels. The molecular-spin qubit also includes a host matrix that is non-isostructural with the molecular color center. The molecular color center is diluted in the host matrix. An optical transition between the ground and excited states lies in the optical region of the electromagnetic spectrum. A spin transition between the first and second sublevels lies in the microwave or millimeter-wave regions of the electromagnetic spectrum. Each of the first and second sublevels is first-order insensitive to magnetic fields near zero magnetic. The molecular color center and host matrix may each be formed from strong-field ligands bound to a metal-atom center. One example of the molecular-spin qubit is Cr(IV)(o-toyl)4 diluted in a host matrix of Sn(IV)(4-fluoro-2-methylphenyl)4.

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 disclosure is directed to a quantum processor system. The system includes a transmission line, a resonator, a qubit coupled to the resonator, and a switching device that couples and decouples the resonator to the transmission line. The resonator stores a range of energies based on a frequency that characterizes the resonator. When a quantum state of the qubit is equivalent to an excited state and the qubit is tuned in accordance with the frequency, energy is transferred from the qubit to the resonator, which stores the energy. The quantum state of the qubit is transitioned to a ground state. When the switching device is closed, the resonator is coupled to the transmission line such that the energy is transferred to the transmission line. When the switching device is opened, the resonator is decoupled from the transmission line.

The invention discloses a quantum phase-locked detection method based on entanglement enhancement, and the method comprises the steps: encoding quantum bits in a ground state and an excited state, and preparing the quantum bits into an initialized quantum state; loading a periodic multi-pulse sequence to act on the quantum bits; and loading a carrier pulse resonating with the ground state and the excited state, detecting the final quantum state of the quantum bit, and comparing curves of each component of the measurement density matrix and the theoretical density matrix changing along with the pulse time interval of the periodic multi-pulse sequence to obtain the half cycle and the amplitude of the sine wave to be measured. According to the method, measurement noise under the condition that the rotation angle and the detuning error exist can be effectively restrained, high measurement precision is kept under the condition that the rotation angle and the detuning error exist, and the robustness enables the method to be more reliable in practical application.

Aspects of the present disclosure may include methods and systems for applying a first light to transition at least one trapped ion of a first quantum processing unit from a ground state to an intermediate state via a narrow quadrupole transition, applying a second light to transition the at least one trapped ion from the intermediate state to an excited state, and directing at least one photon, emitted from the trapped ion relaxing from the excited state back to the ground state, toward a second quantum processing unit to entangle the first quantum processing unit and the second quantum processing unit.

The invention relates to the technical field of fluorescent probes, and provides a fluorescent probe luminescence brightness quantification method and system for coupling excitation wavelength detuning. The fluorescence probe luminescence brightness quantification method for coupling excitation wavelength detuning comprises the following steps: constructing an initial structure of a probe molecule, and optimizing a geometric structure of a ground state of the probe molecule to obtain a stable configuration of the ground state of the probe molecule; based on the stable configuration of the ground state of the probe molecule, the excitation states are calculated, and the excitation energy of the lowest n excitation states of the probe molecule and the absorption transition dipole moments of the probe molecule in the X, Y and Z directions are obtained; based on the stable configuration of the ground state of the probe molecule, optimizing the geometric structure of the lowest excited state of the probe molecule to obtain the emission energy of the lowest excited state of the probe molecule and the emission transition dipole moments of the probe molecule in the X, Y and Z directions; and calculating a luminance index in combination with the energy parameter and the transition dipole moment parameter so as to select an optimal probe. Therefore, accurate and rapid prediction of the luminescence brightness of the probe is realized.

This invention provides a highly efficient method for separating or concentrating lattice defect-containing nanoparticles (NDs). [Solution] A method for separating or concentrating lattice defect-containing ND particles, comprising irradiating a dispersion containing at least two types of ND particles selected from nanodiamond (ND) particles having at least one type of lattice defect and ND particles without the lattice defect with at least one type of excitation laser light having an energy greater than or equal to the resonance absorption energy of the lattice defect and at least one type of stimulated emission laser light, thereby selectively moving the ND particles having the lattice defect by the absorption optical pressure generated by the absorption of at least one type of excitation laser light and the stimulated recoil force generated by the action of at least one type of stimulated emission laser light, wherein the excitation laser light transitions electrons in the ground state of the ND particles to an excited state, and the stimulated emission laser light transitions electrons in the excited state to the ground state faster than spontaneous emission to generate stimulated recoil force.

The present invention belongs to the technical field of synthesis of special functional inorganic fluorescent materials, and relates to a zero / negative thermal quenching near-infrared photoluminescent material, a preparation method thereof and an application. The material is obtained by a solvothermal reaction of 1,2-bis((2-methyl-1H-imidazol-1-yl)methyl)benzene obtained by reacting imidazole with α,α'-dichloro-o-xylene with cuprous iodide. The luminescence of this material is composed of metal-to-ligand charge transfer (MLCT) and cluster center triplet excited state ( 3 CC). This material (λ ex = 400 nm) exhibits a fluorescence thermal quenching effect at 295K - 385K and a fluorescence negative thermal quenching effect at 385K - 475K, and the fluorescence intensity is very stable in the high-temperature region. Its external quantum efficiency is as high as 22.07%, and it is a rare copper cluster that can emit light in the near-infrared region. It is a new type of high-efficiency OLED photoluminescent material with broad application prospects.

A transition metal dichalcogenides device includes a substrate, at least one layer of boron nitride, a tungsten diselenide monolayer positioned such that the at least one layer of boron nitride at least partially encapsulates the tungsten diselenide monolayer, and a plurality of electrodes. Each of the plurality of electrodes includes gold and few-layer graphene, and the at least one layer of boron nitride includes hexagonal few-layer boron nitride. The tungsten diselenide monolayer is configured to reveal excitons when at least one of a K valley and a K′ valley of the tungsten diselenide monolayer is exposed to excitation photon energy and an external magnetic field. The excitons are giant valley-polarized Rydberg excitons in excited states ranging from 2 s to 11 s when the external magnetic field is in the range of about −17 T to about 17 T.

The present invention provides a luminescent material, preparation method, and application thereof, belonging to the field of luminescent functional complexes. Ruthenium complexes contain a greater number of low-light-excited states and high-light-excited states, increasing the number of photons generated when the luminescent material transitions from the low-light-excited state to the ground state and vice versa. This reduces the peak of light intensity, increases the peak of light intensity, and increases the energy difference. Experimental results demonstrate that the energy difference of the luminescent material of the present invention exceeds 146 nm.

The present invention discloses a preparation method and application of a hybrid local-charge transfer excited state scintillator, belonging to the technical field of organic functional materials. The hybrid local-charge transfer excited state scintillator of the present invention overcomes the problems of weak X-ray absorption, low light yield and low X-ray imaging spatial resolution existing in the existing organic functional materials, and broadens the application of HLCT organic fluorescent materials in X-ray imaging. The hybrid local-charge transfer excited state scintillator of the present invention has a short synthesis step, high yield and novel structure, and for the first time, the interaction between the heavy atom and π electron in the molecule is regulated by the strategy of spatial heavy atoms, realizing the preparation of materials with HLCT luminescence mechanism.

The invention discloses a method for detecting a quantum state of a single rare earth ion. The method is based on photonic crystal microcavity enhancement and microwave-light pulse collaborative excitation. A one-dimensional photonic crystal microcavity is arranged in a rare earth ion-doped yttrium silicate crystal, a defect is introduced to enable a resonant wavelength to be matched with a target transition wavelength, and a Purcell effect is utilized to shorten the lifetime of an excited state, improve a target transition branching ratio and enhance fluorescence radiation. Rare earth ions are excited by comprehensively using microwave pulse and light pulse, the quantum state is preprocessed by the microwave pulse, then fluorescence photons are excited and collected by the light pulse, the quantum state is judged according to the change of fluorescence intensity along with integral time, and if the quantum state is obviously increased, the quantum state is the state. According to the detection method provided by the invention, the problems of weak signal and low efficiency of the traditional detection are solved, and an efficient scheme is provided for quantum state reading.

The invention particularly relates to a method for calculating non-equilibrium shock wave layer infrared spectrum radiation based on an NO vibration excited state collision-radiation model. The method comprises the following steps: constructing an NO infrared vibration excited state collision-radiation model; extracting flow field data along a certain specific direction, inputting the flow field data into the NO infrared vibration excited state collision-radiation model, and calculating NO vibration excited state particle number density; calculating each vibration state absorption coefficient of NO based on the NO vibration excited state particle number density; and calculating the absorptivity in any layer on the detection path based on each vibration state absorption coefficient in combination with an apparent ray method, and calculating the NO infrared spectrum radiance based on the absorptivity. The method solves the problems that the spectral radiation calculation precision in hypersonic thermodynamics and chemical unbalanced flow is not high, the unbalanced state is not considered in the calculation, and the excited state particle number density adopted in the calculation of the infrared spectral radiation of NO is inaccurate.

The application discloses a quantum phase-locked detection method based on entanglement enhancement, encodes quantum bits in a ground state and an excited state, and prepares the quantum bits as initial quantum states; a periodic multi-pulse sequence is loaded on the quantum bits; a carrier wave pulse resonating with the ground state and the excited state is loaded; a final quantum state of the quantum bits is detected; curves of each component of a measured density matrix and a theoretical density matrix changing with a pulse time interval of the periodic multi-pulse sequence are compared; and a half period and an amplitude of a to-be-measured sinusoidal wave are obtained. The application can effectively suppress measurement noise under the condition of existing rotation angles and detuning errors, and can maintain high measurement precision under the condition of existing rotation angles and detuning errors. The robustness makes the application more reliable in practical application.

The invention discloses a quantum fidelity estimation method based on a resonance algorithm, and relates to the technical field of quantum computing, and the method comprises the steps: providing a target quantum system with the fidelity to be estimated and a detection quantum bit, initializing the detection quantum bit into a preset energy eigenstate, and enabling the target quantum system to be a quantum state prepared by an experiment; coupling the two to form a coupling system; controlling the coupling system to evolve for a preset time under a preset resonance Hamiltonian; measuring the probability that the detection quantum bit is in a preset excited state; frequency sweeping parameters in the resonance Hamiltonian are adjusted, evolution and measurement are repeated, when the frequency sweeping parameters are matched with the target energy level corresponding to the target quantum system, a peak value appears in the excited state probability, and the peak value is the fidelity of the target quantum system and the quantum state corresponding to the target energy level. According to the method, a large amount of multi-bit measurement is not needed, quantum fidelity estimation can be realized only through single-bit measurement, the measurement times are reduced, and the measurement realization difficulty is reduced.

Embodiments of the present disclosure relate to flux qubit readout of TRANSMON qubits, and provide a method comprising: providing a data qubit and a flux qubit for measuring a state of the data qubit; exciting the data quantum bits to an excited state; biasing the flux qubits into a single well potential energy configuration; tuning the flux qubits such that photons from the excited state of the data qubits are transferred to the flux qubits; biasing the flux qubits containing the transferred photons into a dual well potential energy configuration; and raising a potential barrier between the first well and the second well of the dual-well potential energy configuration, where either the first well or the second well includes the transferred photons, and where the raised potential well prevents the transferred photons from leaking into adjacent wells of the dual-well potential energy configuration.

Provided herein are systems, methods, techniques and computer-readable media for reducing incoherent scattering, which may include: obtaining a plurality of atoms in an array of spatially distinct optical trapping sites, and wherein a selected atom of the atoms comprises a transition energy between a first state and a second state of the selected atom; and applying a first optical energy to the selected atom to shift the transition energy off-resonant with a second optical energy. The systems, the methods, the computer-readable media, and the techniques may further include: obtaining a plurality of atoms in an array of spatially distinct optical trapping sites, wherein the atoms comprise a plurality of qubits; and applying a first optical energy to a selected atom of the atoms to shift an excited state of the selected atom, wherein the shift is configured to suppress scattering of the selected atom by a transition of the qubits.

This application discloses a rare-earth upconversion luminescent material, which comprises a multi-component complex; the multi-component complex comprises a rare-earth metal ion center and an organic ligand chelated and coordinated with the rare-earth metal ion center; the rare-earth metal ion center comprises at least two Yb atoms. 3+ Sensitizer; the upconversion luminescence excitation wavelength of the rare earth upconversion luminescent material is 980 nm; the multi-component complex contains less than or equal to 20408 cm⁻¹ ‑1 The energy levels of the excited state; the rare earth upconversion luminescence is the Yb 3+ Upon excitation, the sensitizer co-transfers energy to the excited state of the organic ligand, which then undergoes upconversion luminescence. This application represents the first realization of upconversion luminescence in rare-earth molecular cages, potentially enabling lanthanide organic components to become novel upconversion luminescent materials for biological applications.

Systems and methods are disclosed for determining interaction parameters for multiple particles, each particle having a ground state, an excited state, and one or more intermediate states The multiple particles are configured to interact with a plurality of electromagnetic fields associated with a (different) transition between two states. The method comprises performing a spectroscopy measurement, measuring an effective Rabi frequency Ωeff, measuring a single-photon Ramsey frequency ΩR i , and determining the interaction parameters based on the measured effective detuning δ eff, the measured effective Rabi frequency Ωeff, and the measured single-photon Ramsey frequencies ΩR i . The interaction parameters may be determined for each of the multiple particles. The interaction parameters may comprise a single-photon Rabi frequency Ω i for each electromagnetic field, which may be used to align the electromagnetic fields with respect to the particles.

A method for improving the operation of an OLED includes maximizing non-radiative transfer of excited state energy from the OLED's organic emissive material to surface plasmon polaritons in an enhancement layer by providing the enhancement layer no more than a threshold distance away from the organic emissive layer; and emitting light into free space from the enhancement layer by scattering the energy from the surface plasmon polaritons through an outcoupling layer that is provided proximate to the enhancement layer but opposite from the organic emissive layer.

The invention provides a broadband frequency hopping device based on high-orbital angular momentum Rydberg atoms. An atomic air chamber comprises the high-orbital angular momentum Rydberg atoms; the first reflecting mirror and the second reflecting mirror are respectively used for reflecting the detection light and the coupling light to the atom gas chamber so as to excite high-orbital angular momentum Rydberg atoms from a ground state to an excited state and pump the high-orbital angular momentum Rydberg atoms to a first Rydberg state; the first microwave generator, the second microwave generator and the third microwave generator are used for enabling high-orbital angular momentum Rydberg atoms to be transited to a second Rydberg state, a third Rydberg state and a fourth Rydberg state respectively; and the photoelectric detector is used for receiving the detection light passing through the atomic gas chamber. According to the invention, frequency hopping crossing 6 octaves can be realized, the frequency hopping speed is 60khops / s, and the frequency hopping point number is expanded under the limited instantaneous bandwidth by using the microwave frequency comb. The method has potential application value in the field of secret radio communication.

The invention relates to the technical field of molecular measurement, in particular to a molecular dynamics measurement method based on quantum coherence control, which comprises the following steps of: acquiring molecular dynamics transition trajectory and electric dipole moment vector data, calculating and recording a transition direction difference scalar, extracting particle momentum change, executing reverse detection to generate a delay trajectory set, and calculating the molecular dynamics transition trajectory and electric dipole moment vector data; the method comprises the following steps of: extracting an included angle cosine value between an electric dipole moment direction vector group and an atomic centroid spacing vector group in electron excited state transition, analyzing an energy level spectrum band offset screening path number, judging transition direction trend matching to obtain a splicable track, and generating a spectrum band interference verification index group. The method comprises the following steps: extracting an included angle cosine value between an electric dipole moment direction vector group and an atomic centroid spacing vector group in electron excited state transition; based on spectral band dynamic screening of energy level numbers, energy gap difference values and transition step length changes, non-continuous changes in the spectral band energy evolution process can be captured with high sensitivity, and the obtained spectral band interference index has the capability of composite evaluation on energy path continuity and direction change consistency.

Embodiments of the microwave amplification system are described. In an embodiment, a microwave amplification system includes a microwave amplifier that contains a paramagnetic material with an impurity. The impurity has a plurality of nuclear spin and electron spin-based energy levels. The system includes an input to receive a pumping signal which is transmitted to the microwave amplifier to cause a population inversion in the impurity and excite it to one of the nuclear spin and electron spin-based energy levels. The system further includes another input to receive an input signal to be amplified by the microwave amplifier, the input signal having a lower power than the pumping signal. Once transmitted to the microwave amplifier, the input signal is amplified by the excited state of the impurity in the microwave amplifier thereby generating an amplified signal.

A system for generating photon emission from atomic nuclei includes a device for generating phonons, and a condensed matter medium comprising atomic nuclei. The phonons interact with the atomic nuclei and affect nuclear states of some of the atomic nuclei by transferring energy to the nuclei and causing the nuclei to emit photons. The condensed matter medium includes excited Fe-57* nuclei and ground state Fe-57 nuclei, and the device for generating phonons comprises one of laser irradiation, electric current, diffusion of solutes in solid solutions, or particle beam bombardment.

The invention provides a substance detection system and method and diagnostic equipment, and belongs to the technical field of electron diffraction, and the substance detection system comprises an electron emission module, a laser emission module and a detection module. The electron emission module comprises an electron emitter and a grid electrode. The electron emission module is used for emitting electronic pulses to the to-be-detected sample in the excited state. The grid electrode is arranged on the periphery of the electron emitter and regulates and controls electron beams emitted by the electron emitter. The laser emission module is used for emitting laser pulses to a to-be-detected sample, so that the to-be-detected sample reaches an excited state. And the detection module is used for detecting detection signals obtained by the laser emission module and the electron emission module acting on the to-be-detected sample. The electronic emission module, the laser emission module and the detection module are arranged to be in mutual time synchronization. According to the substance detection system and method provided by the invention, the dynamic process of different substances in different time scales can be represented, and the technical problem that the application range of a traditional system is narrow is solved.

Selective frequency dissipation is implemented that enables cooling of energy gap protected qubits such that excited energy states resulting from heating or other undesired processes are returned to a lower excited energy state or a ground state manifold, thus reducing the probability of errors. Also, the selective frequency dissipation inhibits leakage from the energy gap protected qubits when in the ground state. Additionally or alternatively, Hamiltonian engineering by inducing parity rotations is implemented to decouple the wells of the energy gap protected qubit to further reduce errors when leakage does happen.

A method for optimizing a quantum operation to be applied on at least two quantum objects of a system of quantum objects, the method including the determination of an optimized pulse to be generated by at least one controlled laser for implementing the quantum operation on the at least two quantum objects while fulfilling a robustness criterion, the at least two quantum objects having a quantum state depending on the excitation level of the at least two quantum objects, the excitation level being chosen between 01, 10 and 11, 0 defining a de-excited state for a quantum object and 1 defining an excited state for a quantum object, the quantum state having a zero order term and a first order term.