84 results about "Magneto-optical trap" patented technology

The invention discloses a cold atom optical frequency standard based on long-strip-shaped diffuse reflection cooling and an implementation method of the cold atom optical frequency standard. The device comprises a cooling laser source, a heavy pump laser source, a long-strip-shaped vacuum glass tube, a narrow linewidth laser source and a photoelectric detector. Wherein atoms are decelerated through a laser cooling technology, and Doppler frequency shift and collision frequency shift related to the atomic movement speed are greatly inhibited; the diffuse reflection laser cooling does not need a gradient magnetic field in a magneto-optical trap configuration, so that the influence of the magnetic field on the energy level of the frequency stabilization atomic can be well avoided; the cold atomic group with the meter-scale length, which is realized by using the long-strip-shaped vacuum glass tube, can also greatly increase the interaction distance between light and atoms, and effectively improve the signal-to-noise ratio of an atomic transition spectral line. The cold atom optical frequency standard based on long-strip-shaped diffuse reflection cooling is achieved, substantial and remarkable progress is brought to medium-and-long-term frequency stability of the optical frequency standard, the optical frequency standard can be further developed into an absolute wavelength standard, and a reference is provided for numerous precise measurement applications.

A compact grating-mirror magneto-optical trap (GMOT) cold atom inertial sensor head is disclosed. To make the sensor head compatible with the high vibration levels encountered in dynamic environments, the number of optical ports in the vacuum chamber is minimized and various components, including fixed optical components and a reflective grating chip, are hard mounted within the vacuum chamber. The use of the reflective grating chip reduces the number of optical ports required for cooling beams from six to one. The number of optical ports is further reduced by time multiplexing multiple beams passing through a given optical port.

The invention discloses an on-chip integrated three-dimensional magneto-optical trap device, and relates to the field of magneto-optical trap device integration, the device comprises a light beam forming structure, a two-layer metasurface chip, a gas chamber and a coil component, the light beam forming structure comprises a laser, a beam splitter and a grating coupler, the beam splitter is used for carrying out beam splitting operation on emergent light of the laser, and the grating coupler is used for carrying out beam splitting operation on the emergent light of the laser; a plurality of output lights formed by the beam splitter are incident to the grating coupler, emergent lights of the grating coupler are respectively guided to the two layers of metasurface chips, the two layers of metasurface chips carry out polarization state regulation and control on the emergent lights of the grating coupler, and finally, the obtained emergent lights are converged or intersected at the central position of the gas chamber. The metasurface chip is used for cooling and trapping atoms, molecules or ions, a traditional lens structure is replaced by the metasurface chip, the size of the magneto-optical trap device is reduced, and the integration level of the magneto-optical trap device is improved.

The application discloses a three-dimensional magnetic optical trap device capable of adjusting cold atom projection speed, comprising a vacuum cavity, wherein an alkali metal source, a first reflector, a second reflector and a third reflector are arranged in the vacuum cavity; a first transmission window piece, a second transmission window piece and a third transmission window piece are arranged on the vacuum cavity; and a cold atom projection adjusting method is disclosed. The six lasers required by the traditional magnetic optical trap are reduced to three lasers through the reflectors integrated in the vacuum cavity, the volume and weight of the system are greatly reduced, the space structure is simplified, the stability of the device is improved, the device can be applied to the fields of atomic sensing technology and atomic clock and the like, and the integration degree of the instrument is improved.

The invention relates to the field of cold atom physical precision experiments, in particular to a high-collimation and low-power-consumption stable atomic furnace. Comprising a heat shielding cover, a transmitting tube is installed at the bottom of the heat shielding cover, one end of the transmitting tube located in a cavity is connected with a collimator through a connecting piece II, the outer side of the collimator is wound with a heating wire II, and the upper end of the collimator is connected with an atomic container; the outer sides of the atom container, the collimator and the connecting piece II are jointly sleeved with a heating layer, and a heating wire I is wound on the outer wall of the heating layer; three shielding layers are sequentially arranged in a cavity between the heating layer and the heat shielding cover from inside to outside; according to the invention, the atomic flux is ensured, the divergence angle and speed distribution of the emitted atoms are enabled to be within the capture range of the magneto-optical trap to a large extent, and the collimation of the atomic furnace is improved; the design of three heat shielding layers and the heat shielding cover is adopted, high polishing treatment is carried out on the heat shielding layers and the heat shielding cover, heat loss is reduced, temperature fluctuation stability is improved, power consumption is reduced, and stability is improved.

The invention relates to a light reflector element having several reflector surfaces which are aligned at an angle to a predefined direction of light incidence of the light reflector element, wherein the reflector surfaces can be arranged ring-shaped around a center of the light reflector element at a uniform angular distance to each other, wherein the reflector surfaces are arranged opposite each other with respect to the center of the light reflector element, so that light incident in the direction of light incidence (L) is deflected by the reflector surfaces into light rays which run towards each other in different spatial directions and meet in a central axis which runs through the center in the direction of light incidence. The invention further relates to a reflector arrangement with at least two such reflector elements and a quantum gradiometer. In general, the invention relates to the field of atom interferometers, in particular with magneto-optical traps (MOTs). In particular, the invention relates to atom interferometric gravimeters and gradiometers formed therewith.

The invention provides an extremely high vacuum quantum measurement device and a measurement method. The device comprises a magneto-optical trap mechanism and a shell, the magneto-optical trap mechanism is arranged in the shell; the magneto-optical trap mechanism comprises a two-dimensional grating magneto-optical trap system, a three-dimensional grating magneto-optical trap system and a differential tube, and the shell is provided with a plurality of interfaces; the plurality of interfaces comprise an alkali metal distributor interface, an ionization vacuum gauge interface, a background gas interface, a first vacuumizing interface and a second vacuumizing interface; the two-dimensional grating magneto-optical trap system is respectively connected with an alkali metal distributor interface and a first vacuumizing interface; the three-dimensional grating magneto-optical trap system is connected with the ionization vacuum gauge interface, the second vacuumizing interface and the background gas interface, the background gas interface is provided with a variable leakage valve, the extremely high vacuum quantum measurement device and the measurement method are high in measurement accuracy, and the size of the quantum vacuum measurement device is effectively reduced.

The invention provides a preparation device and preparation method of an identical single photon source and a preparation method of an entangled photon source, and the preparation device of the identical single photon source comprises a first laser which is suitable for providing an initial laser beam; the magneto-optical trap is suitable for capturing and forming atomic groups; the modulation component is suitable for modulating the initial laser beam under the action of an external modulation signal to obtain a plurality of first laser beams; the first objective lens is suitable for focusing the plurality of first laser beams, so that the plurality of first laser beams form a plurality of first light spots at the focal point of the first objective lens, the plurality of first light spots form an optical dipole trap array, and the optical dipole trap array is suitable for capturing atoms in an atomic group to form a monatomic array; and the waveguide array is suitable for collecting fluorescence generated by exciting the monatomic array under the irradiation of a second laser beam input externally, so as to form an identical waveguide array-assisted collection single photon source array.

The invention relates to the technical field of optical atomic clocks, and discloses a multi-mode magnetic field generation and regulation device and method for a strontium atom optical clock, and the device comprises a three-dimensional magnetic field coil, a magnetic field control system, and a magneto-optical trap. The three-dimensional magnetic field coil comprises an X-direction magnetic field coil, a Y-direction magnetic field coil and a Z-direction magnetic field coil; the X-direction magnetic field coil, the Y-direction magnetic field coil and the Z-direction magnetic field coil are mutually orthogonal and are respectively arranged along opposite positions to form a cubic framework, and the magneto-optical trap is positioned in the cubic framework; the magnetic field control system is electrically connected with the X-direction magnetic field coil, the Y-direction magnetic field coil and the Z-direction magnetic field coil. The technical problems that an existing strontium atom optical clock system is complex in structure and high in power consumption and thermal load, and time sequence characteristics used by a magnetic field in the operation process of the optical clock are not fully utilized are solved.

Disclosed herein is a method of generating and trapping laser cooled metal atoms in a magneto-optical trap, the method comprising (a) providing an apparatus comprising a vacuum chamber, a magneto-optical trap arranged to be generated within the vacuum chamber, and an ablation laser, (b) placing an elemental metal sample within the vacuum chamber and then generating a vacuum within the vacuum chamber, (c) irradiating the elemental metal sample with the ablation laser to generate an atomic vapour formed of elemental metal atoms from the elemental metal sample, and (d) trapping a plurality of the elemental metal atoms in the magneto-optical trap. Also disclosed herein is an apparatus for capturing cold elemental metal atoms, the apparatus comprising a vacuum chamber, an apparatus that generates a magneto-optical trap within the vacuum chamber, an ablation laser, and an elemental metal sample holder, wherein the elemental metal sample holder is situated within the vacuum chamber at a location that does not require the ablation laser to pass through the magneto-optical trap.

The invention discloses an integrated cold atom gravity measurement system based on a grating magneto-optical trap chip. The system mainly comprises an ion pump, a metal vacuum cavity, a transparent ultrahigh vacuum cavity, the grating magneto-optical trap chip, a chip fixing frame, an atom source and a matched light path assembly. In order to solve the problems that an existing three-dimensional magneto-optical trap system is complex in structure and low in integration level, a plane grating magneto-optical trap chip is introduced, the system configuration is effectively simplified, the space utilization rate is improved, and the atom capturing efficiency and purity are remarkably improved. The system has obvious advantages in atomic control performance and integration degree, specifically, efficient cooling and capturing, low power consumption, low noise and good detection performance, and an advanced solution is provided for realizing high-precision and miniaturized gravity measurement.

The invention provides quantum space-time reference integrated measurement equipment, method and system, the equipment comprises a detection device and a control terminal, the detection device comprises a magnetic shielding cylinder, a magneto-optical trap cavity is arranged in the magnetic shielding cylinder, different functional areas are integrated in the magneto-optical trap cavity, and each functional area comprises a cooling cavity in which cooling light and pump light are arranged; the microwave cavity is used for performing Ramsey primary interference after performing initial state preparation on the cold atomic group to obtain a frequency error signal between the output frequency of the local oscillator and the standard frequency; the second-stage interference region is arranged vertically below the free falling outlet of the atoms of the microwave cavity and is used for performing M-Z second-stage interference; the detection area is arranged at the tail end of the detection device and is communicated and connected with the secondary interference area; the control terminal is in communication connection with the detection device. According to the invention, synchronous measurement of time and space reference can be realized, the equipment reference transmission error and the equipment cost are reduced, and the test efficiency of space-time reference information is improved.

The invention particularly relates to a method for improving the frequency measurement accuracy of an optical lattice clock in a microgravity environment, which comprises the following steps of: splitting two beams of lattice light through a lattice light laser, respectively splitting two beams of lattice light from each beam of lattice light, and forming two one-dimensional horizontal optical lattices by four beams of lattice light; wherein a certain distance exists between the beam waist positions of the two one-dimensional horizontal optical lattices in the vertical direction, the midpoint position of the two one-dimensional horizontal optical lattices is the position of a 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 of the axial directions of the two horizontal optical lattices in the horizontal plane are perpendicular to each other; an acousto-optic modulator with identical parameters is loaded on a light path of each beam of lattice light and is used for linear frequency shift and modulation of lattice light frequency; two beams of clock laser are split by a clock laser light source to respectively excite different atomic groups in two one-dimensional horizontal optical lattices. Differential comparison of transition frequencies of different atomic group clocks is realized by synchronously detecting transition spectrum lines of different atomic group clocks, so that common-mode noise in an optical clock system is suppressed. According to the method, the optical lattice clock with ultra-high frequency measurement precision in a microgravity environment can be realized.

The invention belongs to the related field of atom interference differential measurement devices, and discloses an atom interference differential measurement device for realizing a high-consistency double-atom fountain, which comprises a first interference unit, a first atom preparation and detection unit, a second interference unit and a second atom preparation and detection unit which are arranged in sequence, wherein the first interference unit and the second interference unit are respectively used for providing spaces for an atom interference process; and the first atom preparation and detection unit and the second atom preparation and detection unit are respectively used for forming horizontal trapping light and realizing atom trapping of the two three-dimensional magneto-optical traps together with the vertical trapping light. According to the invention, the structure of the whole device is further compact, atom trapping of two magneto-optical traps can be realized only by inputting three beams of trapping light, and the same pair of vertical trapping light can be utilized in the two trapping modules to carry out upthrowing operation on atoms, so that high-synchronism double-substance wave source preparation can be realized; the common-mode effect in atomic interference measurement can be better inhibited, and the requirement for optical power is greatly reduced.

The invention provides a preparation method of a one-dimensional monatomic chain array, and the method comprises the steps: cooling a part of target atoms released by an atom source through a magneto-optical trap, and trapping the target atoms in the magneto-optical trap, so as to form a cold atomic group; modulating the initial optical tweezer light beam output by the light beam generation assembly by using a modulation assembly so as to output a first optical tweezer light beam array; adjusting the position and the optical power of the first optical tweezer beam array so as to enable the center of the first optical tweezer beam array to be consistent with the center of the cold atomic group, thereby obtaining a monatomic array; and a second optical tweezer beam array is output by using the optical path adjusting assembly, and the first optical tweezer beam array and the second optical tweezer beam array form a standing wave type optical tweezer array, so that the monatomic array is converted into a one-dimensional monatomic chain array.

The application provides a quantum space-time reference integrated measurement device, method and system, wherein the device comprises a detection device and a control terminal, the detection device comprises a magnetic shielding cylinder, a magneto-optical trap cavity is arranged in the magnetic shielding cylinder, and different functional areas are integrated in the magneto-optical trap cavity; the functional areas comprise: a cooling cavity, wherein a cooling light and a pumping light are arranged; a microwave cavity, which is used for performing Ramsey first-order interference on a cold atom group after initial state preparation to obtain a frequency error signal between a local oscillator output frequency and a standard frequency; a second-order interference area, which is arranged vertically below an atom free-fall outlet of the microwave cavity and is used for performing M-Z second-order interference; a detection area, which is arranged at the end of the detection device and is connected with the second-order interference area; and the control terminal is in communication connection with the detection device. The application can realize synchronous measurement of time and space references, reduce reference transmission error and equipment cost of the device, and improve the test efficiency of space-time reference information.

A design method of the gradient magnetic field coil for magneto-optical trap based on the cuckoo search algorithm, which relates to the field of the gradient magnetic field coil design in the three-dimensional magneto-optical trap, solves the problems that the calculation complexity of the coil parameters increases in the existing design methods of the gradient magnetic field coil and the method of manually designing the coil parameters is relatively inefficient, and includes the following steps: Step S1: Initialize the algorithm parameters; Step S2: Set the initial parameters of the gradient magnetic field coil for the magneto-optical trap; Step S3: Construct the magnetic field strength model and the magnetic field gradient model on the axis of the gradient magnetic field coil; Step S4: Set the objective function to be optimized; Step S5: Use the cuckoo search algorithm to iteratively optimize the parameters of the objective function; Step S6: Output the optimized parameters and the optimized results. According to this method, it is convenient to quickly design the parameters of the gradient magnetic field coil for the magneto-optical trap according to the requirements, so as to meet the magnetic field requirements of the atomic gravimeter for the atomic capture efficiency and the cooling quality.

The invention discloses a continuous cold atom light filter based on long-strip-shaped diffuse reflection cooling and an implementation method. Diffuse reflection laser cooling is an isotropic cooling mode without a magnetic field, the influence of a gradient magnetic field in a magneto-optical trap on an optical rotation atomic energy level can be effectively avoided, and a cold atom light filter which continuously operates is achieved. Long-strip-shaped diffuse reflection cooling based on the long-strip-shaped vacuum glass tube is technical innovation compared with traditional diffuse reflection cooling, the cold atomic group with the meter-scale length can be achieved, the interaction distance between light and atoms is greatly increased, and compared with a millimeter-scale magneto-optical trap cold atomic group, the optical thickness of the cold atoms is also remarkably increased. According to the invention, the problem that the cold atom optical filter works in a pulse mode due to the limitation of a magnetic field is solved remarkably and effectively, the diffuse reflection cooling technology is applied to the construction of the atom optical filter, and outstanding substantial progress and a remarkable continuous operation effect are achieved.

A loading assembly for providing atomic objects to a confinement apparatus is provided. The loading assembly includes an oven configured to generate an atomic flux of an atomic species / isotope having a non-zero nuclear spin. The loading assembly includes mirror and magnet arrays configured to, when optical beams are provided to the arrays, generate a two-dimensional magneto-optical trap (2D MOT) with a simplified repumping scheme. The 2D MOT is configured to generate a substantially collimated atomic beam from the oven generated atomic flux.

The atoms are captured by a quadrupole magnetic field formed by magnets (106), (108) and three sets of laser pairs. A region (114), which is a non-atom trapping space, is formed in an intersection region (112) where the three laser pairs intersect by shielding a part of the laser pairs (LZ) with magnets (106, 108). By irradiating laser light (118) into the intersection region (112), atoms in the non-atom trapping space move to the outside of the intersection region (112).

The invention discloses a Raman grating magneto-optical trap gravimeter realized by pulse laser. The Raman grating magneto-optical trap gravimeter comprises a central controller, a coherent laser generator and a grating magneto-optical trap gravimeter, the central controller controls the coherent laser generator and is used for outputting control voltage so as to control operation of the seed light laser, the optical fiber electro-optical modulator, the pulse laser generator, the multi-stage optical fiber amplifier and the optical fiber acousto-optic modulator. The seed light laser outputs continuous laser to be injected into the optical fiber electro-optical modulator; the optical fiber electro-optical modulator adopts a radio frequency signal to modulate input continuous laser and then injects the continuous laser into the pulse laser generator; the pulse laser generator continuously converts laser into short-pulse laser and injects the short-pulse laser into the multi-stage optical fiber amplifier; a frequency doubling crystal after short pulse laser amplification; frequency is increased and converted into the required laser wavelength, the laser wavelength is injected into the optical fiber acousto-optic modulator, and the output of the optical fiber acousto-optic modulator is injected into the grating magneto-optical trap gravimeter. The device is simple in structure and low in cost, and the research, development, production and application cost of the device is reduced.

Quantum memory The invention relates to an assembly (11) for a quantum memory (10), the quantum memory (10) being suitable to store and retrieve a quantum information encoded into an optical signal, the assembly (11) being deprived of optical cavity and comprising: - a vacuum chamber (12), - a neutral atoms source (14) suitable to generate neutral atoms in the vacuum chamber (12), and - a magneto-optical trap generator (16) suitable to generate an elongated magneto-optical trap enabling to trap neutral atoms in the vacuum chamber (12) so as to obtain an elongated ensemble of neutral atoms elongated along a so-called elongation axis, the elongation axis being along a vertical direction, the optical signal being intended to propagate in the vacuum chamber (12) along the elongation axis, the quantum information being stored in the elongated ensemble of neutral atoms or being retrieved from the elongated ensemble of neutral atoms depending on a control signal.

A double-layer atom chip gyroscope is composed of two layers of atom chips, the surface chip structure can generate a closed smooth guiding center with no magnetic field zero point ring magnetic guide; the bottom chip can generate a hierarchical transition magnetic trap, so that the cold atom group is smoothly and efficiently loaded into the ring magnetic guide from the macroscopic magnetic optical trap, while increasing the magnetic trap in the ring waveguide angle direction. Through the cooperation of the two layers of chips in time sequence, when the cold atom group is loaded into the ring magnetic guide from the dimple trap formed by the bottom chip, the angular restraint of the magnetic trap to the cold atom group disappears, the radial restraint increases, and the cold atom group provides additional angular momentum, realizes the cold atom group ring beam, and detects the matter wave gyroscope effect. The wire layout of the two layers of chips is a plane structure, which is easy to etch on the chip surface and convenient to debug, and the system is robust.

The present invention provides a method and device for preparing a magneto-optical trap by switching the frequency of a single laser. After locking the laser frequency of a single laser to a preset transition frequency, the laser is frequency-shifted and adjusted to a frequency corresponding to cooling light to obtain cooling light, thereby cooling the preset atoms. Then, after locking the laser frequency of the same laser to another preset transition frequency, the laser is frequency-shifted and adjusted to a frequency corresponding to return pumping light to obtain return pumping light, thereby maintaining the cooling of the preset atoms. By adjusting the frequency of the same laser, cooling light and return pumping light are alternately emitted within a preset period to ensure the cooling effect on the preset atoms.

The invention relates to an injection laser automatic frequency stabilization device and method based on cold atom imaging feedback. The device comprises a primary cooling light path, a secondary cooling light path, a charge-coupled device and a control module. The first-stage cooling light path and the second-stage cooling light path are used for outputting single longitudinal mode laser by using the seed laser, injecting the single longitudinal mode laser into the plurality of injection lasers and then outputting cooling laser into the vacuum system; the charge-coupled device is used for acquiring a cold atom cloud image in the magneto-optical trap of the vacuum system in real time; the control module is used for automatically locking the plurality of injection lasers to a single longitudinal mode state according to the brightness of the cold atom cloud image and a preset sequence; and according to the brightness change of the cold atom cloud image, judging the injection laser which is unlocked and re-locking the injection laser. The problems that a traditional injection locking system is large in size, insufficient in automation, dependent on manpower, poor in environmental adaptability and the like are solved.

The application discloses a kind of molecular sub-Doppler cooling magneto-optical trap design method based on artificial intelligence algorithm, belong to molecular laser cooling technical field.First, construct three-dimensional molecular magneto-optical trap scheme model, then solve the optical Bloch equation of three-dimensional molecular magneto-optical trap scheme model, obtain trapping and cooling acceleration from this;Further optimize trapping and cooling acceleration calculated by optical Bloch equation, to obtain the best parameter point that can simultaneously have trapping and cooling in preset speed and preset spatial range.The present application first introduces Bayesian optimization algorithm into molecular magneto-optical trap design, solves the big problem that has plagued molecular laser cooling, i.e.sub-Doppler heating effect in type II magneto-optical trap.Three-dimensional Monte Carlo simulation shows that the scheme can reduce the temperature of molecular magneto-optical trap to 40 μK, and its phase space density increases by two orders of magnitude, which is a key step to realize molecular Bose-Einstein condensation.

In this magneto-optical trap device, five laser beams are irradiated in a trap space in which atoms are trapped. Of the five laser beams, three laser beams (laser beams a1, a2, a3) pass through the inside of the same plane (Z plane) and are irradiated in the trap space. The two laser beams that intersect that plane (laser beams a4, a5) are irradiated in the trap space. The laser beam a1 is used together as a slowing laser beam b for Zeeman slower.

The invention discloses a compact double-magneto-optical trap device which is composed of a main frame, a glass vacuum cavity, a collimation assembly, a left magneto-optical trap, a right magneto-optical trap and the like. The structural sizes of the left magneto-optical trap and the right magneto-optical trap are reduced by improving the mounting mode of a collimator and a coil; the projection inclination angle is designed to ensure that the atomic group is projected to the center of the opposite magneto-optical trap to improve the repeated trapping efficiency of the atomic group; the invention further discloses an adjustment alignment device and an adjustment alignment method of the compact double-magneto-optical trap device, the optomagnetic coincidence precision is improved by introducing the metal hexahedron, the cooling temperature of an atomic group is further reduced, and finally the portable, compact and stable double-magneto-optical trap device is achieved.

A single-laser modulated small magneto-optical trap (MOT) comprises a laser. The main laser emitted by the laser is split and reflected to form a first cooling beam, a second cooling beam, a third cooling beam, and a feedback beam. The cooling beams form a MOT optical path in which six beams are emitted in pairs and converge at a point within a vacuum chamber. The MOT is formed under the influence of a gradient static magnetic field formed by a first magnetic field coil and a second magnetic field coil. The feedback beam passes through a rubidium vapor chamber and is converted into re-pumping light through a photoelectric probe, a modem, a frequency-locked controller, and an electro-optical modulator. The laser combines the re-pumping light with the generated main laser beam. The device features a low-complexity laser optical path, low cost, and high precision. The vacuum glass chamber has low scattering, high transparency, a low thermal expansion coefficient, and good vacuum sealing, providing excellent optical performance and stability while reducing the effects of magnetic field interference and thermal expansion.

The invention discloses a microwave electric field high-sensitivity measurement method based on Rydberg atom hysteresis trajectory folding, and the method comprises the steps: preparing a high-density cold atom ensemble through a magneto-optical trap, and constructing a two-photon transition path to excite a Rydberg state; regulating and inducing quantum phase change through a microwave field to generate a hysteresis track with an intersection point; in combination with a noise suppression algorithm and a critical point tracking technology, extracting a nonlinear offset of a trajectory intersection point, and establishing a quantitative mapping relation between the nonlinear offset and the microwave field intensity; the atomic density is optimized to enhance the interaction between Rydberg atoms, and the SQL limitation is broken through. The quantum phase change critical behavior and the multi-body effect are combined, sub-nanovolt sensitivity, wide-frequency-band compatibility and high anti-interference capacity are achieved, and a new normal form is provided for high-precision microwave electric field measurement, quantum metering and basic physical research.