20 results about "Atomic state" patented technology

The invention relates to a method for realizing a rapid Rydberg blocking SWAP quantum gate based on continuous modulation laser driving. According to the method, laser is continuously modulated by adopting an analytic waveform generated based on Fourier series calculation, high-coherence Rydberg state transition of atomic quantum bits is driven, and accurate atomic state regulation and control meeting the operation requirements of an SWAP quantum gate are achieved. According to the method, errors are effectively reduced by suppressing high-frequency noise, meanwhile, defects related to mechanical motion are avoided, the heating effect generated in the operation process is prevented, the connectivity and fidelity of neutral atom bits in a large-scale system are remarkably improved, and rapid and high-fidelity SWAP quantum gate operation is achieved. And the method is suitable for low Rydberg blocking intensity, can effectively resist adverse effects such as laser fluctuation, and is compatible with a buffer atom framework, so that the intensity of quantum entanglement connection is enhanced.

This invention relates to an ultra-miniature cold atom inertial sensor with extended interference time, comprising a Raman optical path, a cooling optical path, a MOT coil assembly, a detector chip, and an ultra-miniature passive vacuum cavity. The MOT coil assembly is symmetrically arranged around the outer periphery of the ultra-miniature passive vacuum cavity to trap atomic clusters within the cavity using a magnetic field and to adjust the free fall distance of the atomic clusters. The cooling optical path penetrates both the MOT coil assembly and the ultra-miniature passive vacuum cavity to cool, trap, and prepare the atomic clusters. The Raman optical path is vertically incident on the ultra-miniature passive vacuum cavity to manipulate the cooled and trapped cold atomic clusters for interference. The detector chip is positioned adjacent to the ultra-miniature passive vacuum cavity to detect the atomic state signals after interference. This invention reduces the complexity, size, and weight of the sensor. By modulating the magnetic field to change the position of the trapped cold atomic clusters, adjusting the free fall distance of the atomic clusters, and extending the interference distance and time, it improves the accuracy of inertial measurement.

Some embodiments of the present disclosure provide atom beam interferometry. MTL beams are directed to respective MTL regions along a 3D-cooled atom beam. Within each MTL region, the respective MTL beam coherently imparts photon recoil momenta to atoms of the atom beam to produce an interference signal in the atom beam. The MTL beams are switched between first and second cases providing first and second interfering trajectory paths for the atom beam, and the atom beam is continuously directed through the MTL regions while switching the MTL beams. Atoms from the atom beam are received along the first and second interfering trajectory paths at a detection region. State-dependent responses from the atoms of the atom beam are induced in the detection region to provide data of atomic states occupied by the atoms. The data of the atomic states is translated into an interferometry measurement. Related interferometers are also disclosed.

The application discloses an acceleration measurement method and device based on optical suspended microparticle centroid motion quantum state, which utilizes optical tweezers to trap a four-level atom and a nanometer microparticle in an optical cavity simultaneously, the optical cavity is driven by driving laser LC, a stable cavity optical field, i.e., cavity mode, is excited and formed in the cavity; the cavity optical field is coupled with the internal energy level transition of the atom and the centroid motion of the nanometer microparticle simultaneously, and three control lasers LES, LER and LGR are used to drive three energy level transition processes of the atom; by controlling the three control lasers LES, LER and LGR, a rapid adiabatic process and an atomic state inversion process are realized; wherein, in the process of preparing the centroid motion of the nanometer microparticle to a target Fock state, the forward rapid adiabatic process and the atomic state inversion process are iteratively executed in sequence; in the acceleration measurement process, the reverse rapid adiabatic process, the atomic state inversion process and the population transfer process based on a pi pulse are comprehensively utilized. The application can further improve the measurement sensitivity.

A method for atom-based closed-loop control includes exciting atoms of a gas into one or more Rydberg states, applying one or more signal processing functions to the one or more Rydberg states, and regulating a characteristic of the applied one or more signal processing functions based on, at least in part, a response of the one or more Rydberg states to the one or more signal processing functions. A system for internal quantum-state-space interferometry includes an atomic receiver, an interferometric pathway, and a detector. The interferometer includes an atomic vapor with first atomic states and second atomic states. The interferometric pathway from RF phases between the first and second atomic states is closed by a quantum-state-space. The detector is configured to detect a readout of an interferometric signal. Embodiments include atom-based automatic level control, baseband processors, phase-locked loops, voltage transducers, raster RF imagers and waveform analyzers.

A method for atom-based closed-loop control includes exciting atoms of a gas into one or more Rydberg states, applying one or more signal processing functions to the one or more Rydberg states, and regulating a characteristic of the applied one or more signal processing functions based on, at least in part, a response of the one or more Rydberg states to the one or more signal processing functions. A system for internal quantum-state-space interferometry includes an atomic receiver, an interferometric pathway, and a detector. The interferometer includes an atomic vapor with first atomic states and second atomic states. The interferometric pathway from RF phases between the first and second atomic states is closed by a quantum-state-space. The detector is configured to detect a readout of an interferometric signal. Embodiments include atom-based automatic level control, baseband processors, phase-locked loops, voltage transducers, raster RF imagers and waveform analyzers.

The present disclosure provides methods and systems for performing non-classical computations. The methods and systems generally use a plurality of spatially distinct optical trapping sites to trap a plurality of atoms, one or more electromagnetic delivery units to apply electromagnetic energy to one or more atoms of the plurality to induce the atoms to adopt one or more superposition states of a first atomic state and a second atomic state, one or more entanglement units to quantum mechanically entangle at least a subset of the one or more atoms in the one or more superposition states with at least another atom of the plurality, and one or more readout optical units to perform measurements of the superposition states to obtain the non-classical computation.

To provide a method and system for performing non-classical computations.SOLUTION: An optical system 200 use, as a whole, a plurality of spatially distinct optical trapping sites to trap a plurality of atoms, one or more electromagnetic delivery units 220 to apply electromagnetic energy to one or more atoms of the plurality to induce the atoms to adopt one or more superposition states of a first atomic state and a second atomic state, one or more entanglement units to quantum mechanically entangle at least a subset of the one or more atoms in the one or more superposition states with at least another atom of the plurality, and one or more readout optical units 230 to perform measurements of the superposition states to obtain the non-classical computation.SELECTED DRAWING: Figure 2

To improve EM sensing, detection, measurement, imaging, reception, communication, and source generation by extending capabilities beyond those achievable with conventional sensor technologies and using atom-based quantum sensor technologies.SOLUTION: A method for atom-based closed-loop control includes exciting atoms of a gas into one or more Rydberg states, applying one or more signal processing functions to the one or more Rydberg states, and adjusting characteristics of the applied one or more signal processing functions based at least in part on a response of the one or more Rydberg states to the one or more signal processing functions. A system for internal quantum state space interferometry includes an atomic receiver, an interference path, and a detector. The interferometer includes an atomic vapor having a first atomic state and a second atomic state. The interference path from an RF phase between the first and second atomic states is closed by a quantum state space. The detector is configured to detect a readout of an interference signal.SELECTED DRAWING: Figure 1

The invention relates to a tunable laser frequency stabilization system and method based on Rydberg atom direct current stark, and belongs to the technical field of laser frequency stabilization. The tuned frequency is determined by the atomic state and the voltage at the two ends of the polar plate and can be calculated through a theoretical model, the locked laser frequency has high precision and long-term stability, and the precision and the long-term stability are within MHz. In the invention, the atomic gas chamber with the built-in electrode plate is adopted to avoid the problem that a traditional gas chamber can shield a direct-current electric field, a direct-current electric field can be generated in the atomic gas chamber by applying a voltage to the two ends of the electrode plate, and an atomic energy level moves due to a direct-current stark effect, so that the tuning of the frequency of the coupled laser can be completed; the applied voltage is generally below 10V, the tuning range is between GHz and dozens of GHz according to different selected Rydberg states, and the operation is relatively convenient and simple.

A method for implementing a fast Rydberg blockade SWAP quantum gate based on continuous modulation of a laser. This method uses an analytical waveform generated by Fourier series calculation to continuously modulate the laser, driving the highly coherent Rydberg state transition of atomic qubits to achieve precise atomic state control that meets the operation requirements of the SWAP quantum gate. The present invention effectively reduces errors by suppressing high-frequency noise, while avoiding defects related to mechanical motion and preventing heating effects generated during operation, significantly improving the connectivity and fidelity of neutral atomic qubits in large-scale systems and achieving fast and high-fidelity SWAP quantum gate operations. Moreover, it is applicable to low Rydberg blockade intensities, can effectively resist adverse effects such as laser fluctuations, and is compatible with the buffer atom framework, thereby enhancing the strength of quantum entanglement connections.

The present disclosure provides methods and systems for performing non-classical computation. The methods and systems generally use: a plurality of optically distinct optical trapping sites to trap a plurality of atoms; one or more electromagnetic delivery units to apply electromagnetic energy to one or more of the plurality of atoms to induce the atom to adopt one or more superposition states of a first atomic state and a second atomic state; one or more entangling units to quantum mechanically entangle at least a subset of the one or more atoms in the one or more superposition states with at least another atom of the plurality of atoms; and one or more readout optical units to perform a measurement of the superposition state to obtain a non-classical computation.

A method for atom-based closed-loop control includes exciting atoms of a gas into one or more Rydberg states, applying one or more signal processing functions to the one or more Rydberg states, and regulating a characteristic of the applied one or more signal processing functions based on, at least in part, a response of the one or more Rydberg states to the one or more signal processing functions. A system for internal quantum-state-space interferometry includes an atomic receiver, an interferometric pathway, and a detector. The interferometer includes an atomic vapor with first atomic states and second atomic states. The interferometric pathway from RF phases between the first and second atomic states is closed by a quantum-state-space. The detector is configured to detect a readout of an interferometric signal. Embodiments include atom-based automatic level control, baseband processors, phase-locked loops, voltage transducers, raster RF imagers and waveform analyzers.

The invention relates to a subminiature cold atom inertial sensor with prolonged interference time, which comprises a Raman light path, a cooling light path, MOT coil groups, a detection chip and a subminiature passive vacuum cavity, and is characterized in that the MOT coil groups are symmetrically arranged on the periphery of the subminiature passive vacuum cavity so as to trap atomic groups in the subminiature passive vacuum cavity through a magnetic field; the free falling stroke of the atomic group is adjusted; the light path of the cooling light penetrates through the MOT coil assembly and the ultra-small passive vacuum cavity so as to cool, trap and prepare atomic groups; a Raman light path vertically enters the ultra-small passive vacuum cavity so as to control the cooled and imprisoned cold atomic group to interfere; and the detection chip is arranged adjacent to the subminiature passive vacuum cavity so as to detect the interfered atomic state signal. According to the invention, the complexity, volume and weight of the sensor are reduced, the position for trapping the cold atomic group is changed by modulating the magnetic field, the free falling stroke length of the atomic group is adjusted, the interference distance and interference time of the cold atomic group are prolonged, and the precision of inertial measurement is improved.

The present invention discloses a double-T composite high-dynamic range atomic interferometry gravity measurement method and device, comprising: S1. Atom cooling: preparing a cold atomic cluster using a magneto-optical trap unit; S2. Atom initial state preparation: preparing an atomic ensemble in a single-component dual-momentum domain using an atomic velocity and state selection unit; S3. Double-T composite interference: after atoms enter an interference cavity, two groups of narrow-band Raman pulse sequences are used to respectively manipulate the atoms in two velocity domains to form a double-T composite interferometer; S4. Four-channel decoupling detection: using a combination of velocity-selective Raman pulses and energy-state-selective fluorescence resonance pulses to form a composite detection sequence, and using a photodetector to realize decoupling measurement of the atomic states of four output channels; S5. Raman light frequency or phase scanning: scanning the frequency or phase of the two groups of Raman light pulses of the double-T interferometer to form interference fringes; S6. Four-channel signal joint analysis: performing a joint analysis on the output signals of the four channels to calculate the gravitational acceleration value.

To provide a method and system for performing non-classical computations.SOLUTION: A system 200 generally uses: a plurality of spatially-distinct optical capturing sites for capturing a plurality of atoms; one or more electromagnetic delivery units 220 for applying electromagnetic energy to one or more atoms of the plurality of atoms to induce the atoms to adopt one or more superposition states of a first atomic state and a second atomic state; one or more entanglement units for quantum-mechanically entangling at least a subset of the one or more atoms in the one or more superposition states with at least another one of the plurality of atoms; and one or more readout optical units 230 for performing measurements of the superposition states to obtain non-classical computations.SELECTED DRAWING: Figure 2

The present disclosure provides methods and systems for performing non-classical computations. The methods and systems generally use a plurality of spatially distinct optical trapping sites to trap a plurality of atoms, one or more electromagnetic delivery units to apply electromagnetic energy to one or more atoms of the plurality to induce the atoms to adopt one or more superposition states of a first atomic state and a second atomic state, one or more entanglement units to quantum mechanically entangle at least a subset of the one or more atoms in the one or more superposition states with at least another atom of the plurality, and one or more readout optical units to perform measurements of the superposition states to obtain the non-classical computation.

The invention relates to the technical field of equipment control, and provides an equipment control method and device, equipment and a computer storage medium. The method comprises the following steps: acquiring equipment state information, collected by a multi-mode sensor, of the electronic equipment; identifying the equipment state information to obtain a plurality of atomic states; according to the multiple atomic states, a pre-constructed state map is inquired, multiple state sequences are obtained, nodes of the state map represent the atomic states, edges of the state map represent the incidence relation between the states, and weights of the edges represent the historical execution effect of a task corresponding to the conversion from the precursor state to the subsequent state; determining a target state sequence from the plurality of state sequences; the target state sequence is analyzed into at least one equipment control task, and the equipment control task is used for indicating a control action executed by the electronic equipment so as to achieve a state evolution target defined by the target state sequence; and controlling the electronic equipment according to the equipment control task.

A method for controlling an atomic clock is described. The method includes receiving, at a processor, a request including an operational mode of multiple operational modes for the atomic clock. The atomic clock includes a local oscillator, a vapor cell, a detector, and a local oscillator controller. The vapor cell includes atoms and receives from the local oscillator a signal having a frequency. The signal causes transitions of the atoms between atomic energy states. The detector detects the transitions and provides to the local oscillator controller an error signal based on the transitions. The error signal indicates a difference between the frequency and a target frequency. The local oscillator controller controls the local oscillator based on the error signal. The processor determines, based on the operational mode, values for control parameters for the atomic clock. The atomic clock is controlled using the values of the parameters.

A method for simulating and calculating material radiation damage calculates the angular flux function of irradiated particles and uses this angular flux function to simulate the primary dissociated atomic states of different elements within the target material under irradiation, thereby obtaining the spatial distribution of maximum radiation damage and establishing a functional relationship between the spatial distribution of radiation damage and the transport distance of the irradiated particles. A finite element model of the target material is established, and the radiation source distribution and source intensity are defined within the finite element model. The radiation damage state within each finite element is calculated, thereby obtaining the spatial distribution of radiation damage within the target material model. This method can accurately simulate the radiation damage behavior of materials with multiphase and polycrystalline structures, improving the accuracy of nuclear engineering safety assessments. The present invention also provides a calculation device.