23 results about "Optical lattice" patented technology

To achieve Ramsey spectroscopy while effectively suppressing the Doppler effect.SOLUTION: A Ramsey spectroscopic device 1 includes: an optical path 10; an optical path length stabilizing circuit 30 that stabilizes the length of the optical path 10; a modulator 20 that is optically connected to the optical path 10, generates, in a pulse shape multiple times, a resonant laser beam at a first frequency f1 that causes resonance of atoms, molecules, or ions, which are a spectroscopic target, and generates a non-resonant laser beam at a second frequency f2 that does not cause resonance; and a spectroscopic unit 200 that spectroscopically disperses the spectroscopic target. The spectroscopic unit detects a state change of the spectroscopic target according to the frequency f1 by irradiating the spectroscopic target with the resonant laser beam.SELECTED DRAWING: Figure 1

Provided is an apparatus and method in which, in a first region that traps atoms in a first state by a first light and a magnetic field, atoms are optically pumped into a second state and thereby trapped by magnetic force. The atoms in the second state trapped in the first region are moved from the first region to a second region by force of gravity or the radiation pressure from second light. In the second region, the second light is radiated on the atoms in the second state, and the atoms in the second state are thereby cooled. The atoms are optically pumped into a third state that is insensitive to magnetic fields and thereby released from a magnetic trap and transported to a post device by a moving optical lattice or an optical dipole guide.

The invention relates to the technical field of optical clock metering instruments, in particular to a microscopic particle mass measurement method and system based on an optical lattice clock, and the method comprises the steps: forming a one-dimensional horizontal shallow light lattice to constrain a to-be-measured microscopic particle based on an optical lattice clock platform; firstly, to-be-measured particles are subjected to laser cooling and then loaded to optical lattices, and the to-be-measured particles are prepared to a ground state single Zeeman sub-energy level through optical pumping. Then, modulating a beam of lattice light in the one-dimensional horizontal shallow light lattice to enable the lattice light to periodically shake; then, determining the line widths of clock transition spectral lines of the particles to be measured under different modulation amplitudes, and finding out the critical modulation amplitude corresponding to the minimum line width; and finally, according to the critical modulation amplitude and the lattice light wavelength, accurately deducing the absolute mass of the microscopic particles imprisoned by the light lattice.

In the current space navigation, communication, and defense technologies, it is difficult to integrate local control of time, gravity operation, use of dark matters, and communication with the outer space (the Buddhist monk Tenkai's gyrus), and intergalaxy communication, ultrahigh-speed movement, and creation of a time acceleration / deceleration space cannot be realized by modern technologies.SOLUTION: The present invention is a future note related to an ultra-future space technology capable of integrally operating time, gravity, and material behavior by performing local and large-scale dark matter control by a BHc / WHc gate based on a dark matter fluid space model and a space gate theory.SELECTED DRAWING: None

A method for changing an inter-particle distance (D) between particles (1) arranged in a particle array (2) is provided, the method comprises creating a primary optical lattice (10), loading the particles (1) into the primary optical lattice (10) such that the particles (1) are trapped in the primary optical lattice (10), changing a primary-lattice spacing (L1) of the primary optical lattice (10) to change the inter-particle distance (D), creating an auxiliary optical lattice (20), ramping up the auxiliary-lattice and ramping down the primary optical lattice until the particles (1) are trapped in the auxiliary optical lattice (20), setting the primary-lattice spacing (L1) to a different primary-lattice spacing value, ramping up the primary-lattice and ramping down the auxiliary lattice (20) until the particles are trapped in the primary optical lattice (10) again.

An electronic state splitter for atoms comprises an atom supplier, an atom movement path, a probe laser source, and a magnetic field generator. The atom supplier supplies atoms moving at a constant velocity along the atom movement path. The probe laser source supplies a probe laser propagating in the atom movement path in the same direction as or opposite to the motion of the atoms on the same axis as the atom movement path. The magnetic field generator generates a magnetic field orthogonal to the atom movement path in the atom movement path to mix the wave function of the clock upper state with the electronic state allowing electric dipole transitions, allowing pulsed excitation of clock transitions by the probe laser uniform in time and space. Accordingly, continuous spectroscopy of atomic transitions and frequency control of the probe laser are possible, which improves the stability of the atomic clock.

The present application relates to a kind of gravity potential measurement system, method and ore body detection method, wherein the method includes: reference station optical lattice clock is used to generate reference light frequency signal;At least one mobile station optical lattice clock is used to generate local light frequency signal;Reference station optical frequency comb is used to coherently map reference light frequency signal to radio frequency band, and output reference frequency signal;Transmission link is used to coherently transfer reference frequency signal to mobile station optical frequency comb;Mobile station optical frequency comb is used to coherently restore received reference frequency signal, obtain the restored light frequency signal consistent with the frequency of reference light frequency signal, restore light frequency signal and local light frequency signal are frequency-mixed, and the frequency offset generated by gravitational redshift effect is output;Data processing module is used to convert the frequency offset into the gravitational potential difference between the position of reference station optical lattice clock and mobile station optical lattice clock.The present application can improve the reliability and practicality of gravity potential measurement.

Systems, methods, and computer-readable media for implementing non-classical computing may comprise generating an array of atoms comprising greater than 150 atoms and a fill factor of greater than 95% occupancy, wherein the plurality of atoms are trapped by a cavity-enhanced optical lattice and one or more optical tweezers.

A sample reservoir (104) containing a sample (118), a nozzle (106), and a heated element (108) are arranged in a vacuum chamber (102). An induction coil (114) is located on the outside of the vacuum chamber (102). The heated element (108) is located around the sample reservoir (104) and the nozzle (106). Electromagnetic power is wirelessly transferred from the induction coil (114) to the heated element (108), whereby the heated element (108) is heated. Heating of the heated element (108) causes the sample reservoir (104) and the nozzle (106) to be heated, whereby the sample (118) in the sample reservoir (104) is heated. An atomic beam generated by the heating of the sample (118) is emitted from the nozzle (106).

The atomic electronic state separator (1) of the present invention includes: an atomic supply unit (11), an atomic movement path (12), a probe laser source (13), and a magnetic field generating unit (M). The atomic supply unit (11) supplies atoms that move in the atomic movement path (12) at a certain speed. The probe laser source (13) supplies a probe laser that propagates coaxially with the atomic movement path (12) in a direction opposite to or the same as the direction of atomic movement. The magnetic field generating unit (M) generates a magnetic field orthogonal to the atomic movement path (12) in the atomic movement path (12) and mixes it with the wave function of the electronic state that allows electric dipole transitions, thereby enabling pulse excitation of clock transitions based on the same probe laser in time and space. Alternatively, a magnetic shielding member can pulse excite clock transitions by shielding the magnetic field applied in the atomic movement path (12) and spatially changing the Zeeman frequency shift, thereby enabling pulse excitation of clock transitions by the same probe laser in time and space. As a result, it is possible to continuously perform spectral analysis of atomic transitions and frequency control of the detection laser, thereby improving the stability of the atomic clock.

The application discloses a method for preparing a two-dimensional ultracold atomic gas by optimizing adiabatic compression, and belongs to the technical field of ultracold atomic physics and optical lattice. The method takes the quantum adiabatic evolution of a three-dimensional ultracold atomic gas in an adjustable period optical lattice as a physical model basis, and equivalently describes the motion of atoms in the lattice bound direction as a one-dimensional quantum harmonic oscillator system varying with an external parameter. In the lattice compression process, the instantaneous energy level structure of the system evolves with time, and the minimum energy gap region between the lowest energy level and the first excited state is the main source of non-adiabatic transition. A non-adiabatic parameter is introduced to simultaneously describe the relationship between the instantaneous energy gap and the scanning rate of the parameter, which is used for quantitative evaluation of the adiabaticity of the system, and the Landau-Zener non-adiabatic transition model is combined to design and optimize the scanning curve of the lattice compression. The scheme can effectively reduce the probability of non-adiabatic excitation in the compression process, and significantly shorten the lattice compression time under the premise of ensuring the adiabatic evolution of the system.

The application relates to a method for improving the frequency measurement precision of an optical lattice clock in a microgravity environment, which comprises the following steps: two beams of lattice light are divided from one lattice light laser, each beam of lattice light is further divided into two beams of lattice light, and four beams of lattice light form two one-dimensional horizontal optical lattices; wherein the waist positions of the two one-dimensional horizontal optical lattices have a certain interval in the vertical direction, and the midpoint position is the position of the magnetic field zero point in the magneto-optical trap; the projections of the axial directions of the two horizontal optical lattices in the vertical plane are parallel to each other, and the projections in the horizontal plane are perpendicular to each other; an acousto-optic modulator with the same parameters is loaded on the light path of each beam of lattice light, and is used for linear frequency shift and modulation of the lattice light frequency; two clock laser beams are divided from one clock laser source, and are used for exciting different atomic groups in the two one-dimensional horizontal optical lattices. By synchronously detecting the clock transition spectral lines of each different atomic group, the differential comparison of the clock transition frequencies of different atomic groups is realized, so that the common-mode noise in the optical clock system is suppressed. The method can realize an optical lattice clock with super-high frequency measurement precision in a microgravity environment.

This invention discloses a synchronous multi-parameter Flokai modulation method and system for optical lattices, relating to the fields of quantum precision measurement and quantum control technology. The method includes: frequency modulation of lattice light using an acousto-optic modulator, causing its frequency to change with time according to a preset periodic function, generating a frequency-modulated laser which is then input into a polarization modulation module. A time-varying phase delay is introduced through an electro-optic modulator, and the phase delay is converted into a periodic rotation of the linear polarization direction through polarization modulation, resulting in a synchronously multi-parameter modulated lattice laser that always maintains linear polarization. Frequency modulation and polarization modulation are uniformly generated and synchronously driven by a synchronization control module, and they have a stable and adjustable relative phase relationship. By using the synchronously multi-parameter modulated lattice laser to form a standing wave light field, synchronous multi-parameter Flokai modulation of optical lattices is achieved, enabling high-frequency dynamic modulation of the polarization direction while maintaining linear polarization, co-controlling frequency and polarization, and making it suitable for precision measurements using optical lattice clocks.

An apparatus for generating vertically separated atom clouds. The apparatus comprises an optical system comprising an arrangement of lenses and optics. The optical system is configured to trap and cool atoms to form a cold atom cloud; select the hyperfine level of the atoms; trap atoms of the cold atom cloud in a standing wave optical lattice; and vertically split the cold atom cloud into a high cold atom cloud and a low cold atom cloud. The splitting comprises splitting the cold atom cloud into two clouds by launching atoms of the cold atom cloud in opposite directions to form a high cold atom cloud and a low cold atom cloud, and catching the low cold atom cloud up to reach the same velocity as the high cold atom cloud.

According to the present invention, atoms are trapped by means of a quadrupole magnetic field formed by ring-shaped magnets (106), (108) and three sets of laser beam pairs. A portion of the laser beam pairs LZ is partially blocked by the ring-shaped magnets (106), (108), so that a region (114) which is a non-atom trap space is formed inside a intersecting region (112) where the three groups of laser beam pairs cross. The inside of the intersecting region (112) is irradiated with a laser beam (118) so that atoms within the non-atom catch space are extracted from intersecting region (112).

The invention relates to the technical field of cold atoms, in particular to a laser two-dimensional intensity profile reconstruction method and system based on a cold atomic clock, and the method comprises the steps: preparing cold atoms, loading the cold atoms into an optical lattice to serve as a detection medium, configuring the cold atoms, and enabling the cold atoms to move in a plane perpendicular to the propagation direction; at different two-dimensional positions of the interrogation laser, transition response signals when the cold atoms interact with the laser are measured. And based on a preset mapping relationship between the transition response signal and the laser intensity, reconstructing a two-dimensional intensity distribution profile of the interrogation laser at the cold atom position through a data fitting technology. According to the method, high-precision laser intensity distribution measurement is realized by utilizing quantum characteristics of cold atoms, a new technical means is provided for laser parameter calibration and spatial light field characterization of the cold atomic clock, and the method has the advantages of non-invasion, high sensitivity and spatial resolution and can be applied to the fields of quantum metering, light field diagnosis, precision spectroscopy and the like.

A quantum computing (QC) system includes a first plurality of logical qubits in a first substantially planar region and a second plurality of logical qubits in a second substantially planar region that is substantially parallel to the first substantially planar region. At least some of the first plurality of logical qubits are configured to interact with one another, and at least some of the second plurality of logical qubits are configured to interact with one another and to interact with the at least some of the first plurality of logical qubits. The QC system can include additional pluralities of logical qubits in additional substantially planar regions that are substantially parallel to the first and second substantially planar regions and at least some of the second plurality of logical qubits can be configured to interact with one or more of the additional pluralities of logical qubits.

This invention discloses a dual-band optical-microwave atomic clock based on cesium atoms and its implementation method. This invention utilizes cesium atoms, currently used for defining the second, as quantum references for both the microwave and optical atomic clocks, realizing atomic clocks in both microwave and optical bands. The two bands can be switched arbitrarily and can be output simultaneously. Compared to optical lattice clocks and ion clocks, the optical clock based on hot cesium atoms does not require an ultrastable local oscillator and an ultracold atomic quantum reference, offering advantages such as small size and long-term continuous operation. Compared to traditional microwave-pumped miniature cesium clocks, applying the laser output from the optical clock to the pump and probe beams of the optically pumped miniature cesium clock reduces laser frequency noise, resulting in a microwave clock with higher frequency stability. This invention requires only one local oscillator laser source, featuring a simple structure, convenient operation, excellent performance, and low cost. This invention is highly practical, expanding the application range of cesium-based microwave atomic clocks and miniaturized high-performance optical frequency atomic clocks.

The invention relates to the technical field of atomic physics and quantum optics, in particular to a one-dimensional moving optical lattice generation method and device with a phase locking function, and the device comprises a laser frequency locking unit, a lattice laser unit, a scientific cavity and a phase feedback unit which are sequentially arranged. The laser frequency locking unit generates set frequency laser and divides the set frequency laser into two paths, one path is input into the lattice laser unit, and the other path is locked in a set wavelength range after frequency shifting. The lattice laser unit performs frequency shift on input laser to generate first lattice light and second lattice light, and the two beams of light are subjected to reverse propagation, polarization state modulation and frequency modulation and then are overlapped and interfered in a scientific cavity to form a one-dimensional mobile optical lattice. The phase feedback unit collects interference signals of the first lattice light and the second lattice light, and the relative phase between the two beams of light is locked through closed-loop control. The system realizes the generation of a high-stability one-dimensional mobile optical lattice through a precise laser frequency control and phase locking technology, and is suitable for the fields of quantum simulation, precise measurement and the like.

The invention discloses an optical lattice clock enhancement cavity automatic locking device, which comprises a power supply unit, an input voltage setting unit, a state detection unit, a logic control unit and an automatic locking unit, and is characterized in that the state detection unit comprises an over-limit detection circuit and a lock loss detection circuit; the logic control unit comprises a first OR gate circuit, a second OR gate circuit, a third OR gate circuit, an enabling switch, an AND gate circuit, a second NAND gate circuit and a monostable pulse generator, and the automatic locking unit comprises a sampling hold circuit, a summing circuit and an output voltage amplitude limiting circuit. The invention further discloses an automatic locking method for the enhancement cavity of the optical lattice clock. According to the invention, primary locking can be quickly established for the enhanced cavity in an experiment, the locking state of the enhanced cavity can be monitored in real time, automatic relocking is realized after the enhanced cavity is unlocked, and manual intervention is effectively reduced.

Systems, methods, and computer-readable media for implementing non-classical computing may comprise generating an array of atoms comprising greater than 150 atoms and a fill factor of greater than 95% occupancy, wherein the plurality of atoms are trapped by a cavity-enhanced optical lattice and one or more optical tweezers.

The invention discloses a main vacuum cavity device of a high-precision optical lattice clock, which belongs to the field of metering instruments and comprises a special-shaped main vacuum cavity provided with a plurality of windows, interfaces and electrodes. A heat shield device is arranged in the special-shaped main vacuum cavity, an indium tin oxide conductive optical thin film is arranged on the side, close to the vacuum side in the special-shaped main vacuum cavity, of the window, the indium tin oxide conductive optical thin film is communicated with the special-shaped main vacuum cavity, and the inner surface of the special-shaped main vacuum cavity is coated with carbon nano tube ultra-black paint. A heat shield through hole is formed in the center of a heat shield body of the heat shield device, grooves are formed in the two sides of the heat shield body, film platinum resistors are installed on the grooves, the cold end of a Peltier is attached to one end of the heat shield body, the hot end of the Peltier is attached to one end of a heat conduction base, and the other end of the heat conduction base is installed on the inner surface of a special-shaped main vacuum cavity. The heat insulation layer is arranged on the outer surface of the heat shield body, direct-current stark frequency shift can be eliminated, and the uncertainty of black-body radiation frequency shift can be reduced to 10-19 orders of magnitude.