106 results about "Rydberg atom" patented technology

Quantum optimization with Rydberg atom arrays is provided. In particular, methods are provided for solving combinatorial graph optimization problems, constraint satisfaction problems, maximum independent set problems, algebraic problems, and factoring.

The embodiment of the invention provides a switch cabinet partial discharge quantum sensing monitoring device. The device is applied to the technical field of power equipment monitoring, and comprises a light path regulation and excitation module which is used for generating and beam-splitting detection laser of a quantum sensor coupled to each Rydberg atom; the quantum electromagnetic induction module acts on Rydberg atoms and a partial discharge electromagnetic field, and fluorescence or absorption spectrum characteristics of atomic energy level transition are changed; extracting a weak discharge signal, and converting the weak discharge signal into an analyzable electric signal; the signal processing and diagnosis module is combined with spatial information acquired by a quantum sensor of doydberg atoms in a distributed manner, and a time-frequency analysis and pattern recognition algorithm is adopted to extract discharge characteristic quantity; partial discharge positioning, type identification and insulation state evaluation are realized based on the parameters, and a real-time monitoring result and early warning information are output. In this way, through deep fusion of quantum sensing and advanced signal processing, a high-precision and high-reliability technical solution is provided for power equipment state monitoring.

The invention discloses a Rydberg atom-based microwave regulation multi-channel frequency hopping device, which comprises an atomic gas chamber, probe light enters and passes through the atomic gas chamber from one end of the atomic gas chamber and then is reflected to a photoelectric detector through a polarization splitting prism, and coupled light is reflected by a reflector and then is transmitted to the photoelectric detector. The coupling light passes through the polarization splitting prism and enters the atomic gas chamber from the other end of the atomic gas chamber, and the coupling light reflected by the reflector and the probe light are overlapped in optical path and opposite in propagation direction; a local oscillator microwave signal generator and an auxiliary microwave signal generator are arranged on one side of the atomic gas chamber, the local oscillator microwave signal generator and the auxiliary microwave signal generator emit microwave signals into the atomic gas chamber, and the other side of the atomic gas chamber receives radio frequency signals to be measured; the invention further discloses a microwave regulation and control multi-channel frequency hopping method based on the Rydberg atoms. By reasonably configuring the frequency of the auxiliary microwave signal and the frequency of the local oscillation microwave signal, flexible frequency hopping of cesium Rydberg atoms in six different channels is achieved.

The invention relates to a Rydberg atomic communication receiving system and method based on AT split peak value analysis, and belongs to the technical field of quantum communication. The system comprises a detection laser, a coupling laser, an AOM / EOM, a function generator, a high-frequency signal generator, a cesium atom gas chamber, a photoelectric detector, a lock-in amplifier, a data acquisition module and a microwave signal output module. The AOM / EOM modulates the frequency of the detection laser; the microwave signal output module generates an AM modulation microwave signal and transmits the AM modulation microwave signal to the cesium atom gas chamber, so that the target Rydberg state atoms generate an AT splitting effect to calibrate system parameters; the photoelectric detector and the lock-in amplifier obtain a first harmonic component based on the transmission light. During communication, the system is arranged in a microwave electric field received by communication, and the data acquisition and processing module outputs AM modulation microwave signals received by the recovered cesium atom gas chamber based on calibrated system parameters and phase locking. The method solves the problem of signal distortion existing in EIT-AT direct communication transmission and the problem of tedious operation of a heterodyne method.

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

Quantum reservoir computation is provided. A first feature vector is determined from input data. A plurality of qubits is configured in an initial configuration according to the first feature vector, wherein a detuning, Rabi frequency, phase, and / or position of each of the plurality of qubits is determined by a respective one of the values of the first feature vector. The plurality of qubits is evolved for a first time. The plurality of qubits is measured to obtain first measurements after the first time. The plurality of qubits is returned to the initial configuration. The plurality of qubits is evolved for a second time. The plurality of qubits is measured to obtain second measurements after the second time. A second feature vector is determined from the first and second measurements. The second feature vector is provided to a decoder and a characteristic of the input data is obtained therefrom.

The invention provides a Rydberg atomic electromagnetic signal detection device based on correlated photon coincidence measurement, and the device comprises a correlated photon source assembly which is used for enabling single-polarization and frequency-stable laser to generate polarization orthogonal correlated photon pairs; the Rydberg atom preparation system is in communication connection with the associated photon source assembly, and associated photon pairs emitted by the associated photon source assembly enter the Rydberg atom preparation system; the correlation detection assembly is in communication connection with the Rydberg atom preparation system and is used for counting transmission photons of the EIT-AT split transmission spectrum signals, and when the difference value between the reference photon arrival time and the transmission photon arrival time is within a preset range, the EIT-AT split transmission spectrum signals are regarded as coincidence events and coincidence counts are recorded. According to the invention, the problem of low sensitivity caused by the defects of optical readout noise, weak off-resonance field response, sensitive temperature drift vibration environment and the like in the prior art is solved.

A system for automatically locking a control laser in a Rydberg atomic sensor may comprise an atomic vapor cell, a probe laser configured to excite the atoms in the atomic vapor cell to an intermediate energy state, and a control laser configured to excite the one or more atoms in the atomic vapor cell from the intermediate energy state to a higher energy state. The light generated by the control laser may be dithered at a pre-determined frequency. The system further comprises a photodiode configured to convert light received from the vapor cell into an electrical signal, a lock-in amplifier configured to generate an error signal based on the electrical signal received from the photo diode and a received reference oscillation frequency, and a servo configured to receive the generated error signal from the lock-in amplifier and adjust a frequency of the control laser based on the received error signal.

This invention discloses a weak micro-Doppler detection system for Rydberg atoms using isotropic idler light, belonging to the field of electromagnetic measurement technology. It includes a light pair generation module for acquiring initial light source parameters, injecting pump light and coupling light to generate quantum correlated light pairs; an information loading module for emitting probe light to generate modulated coupling light; a coherent detection module for demodulating the modulated coupling light and isotropic idler light to generate a difference-frequency electrical signal; a parameter tuning module for extracting signal quality indicators and light source quality indicators, tuning the current light source parameters, and generating updated light source parameters; and a spectrum analysis module for analyzing the difference-frequency electrical signal to obtain micro-Doppler characteristics. This invention employs a combined technical solution of quantum correlated light pair generation, Rydberg atom information loading, coherent detection, and closed-loop tuning, which can generate a difference-frequency electrical signal with a high signal-to-noise ratio, and achieve high-sensitivity measurement of the micro-Doppler characteristics of weak targets through spectrum analysis.

This invention discloses a noise reduction method for electromagnetic measurements of Rydberg atoms. This method constructs a 509nm coupled optical closed-loop circulation system comprising a polarization beam splitter, a half-wave plate, and a high-reflection mirror. This enables multiple reciprocating propagations of the laser within the atomic gas chamber. Utilizing the optical path circulation mechanism, the coupling strength between light and atoms is significantly improved without increasing the laser source power, thus greatly enhancing the excitation efficiency of Rydberg states. Simultaneously, this structure allows the intermediate frequency carrier signal to linearly and coherently superimpose with the number of cycles, while the laser background noise accumulates incoherently only according to a square root law, thereby significantly improving the measurement signal-to-noise ratio. This invention solves the problems of low excitation efficiency and difficulty in eliminating laser background noise in existing single-path optical systems, providing a new solution with high excitation efficiency and high signal-to-noise ratio for high-sensitivity microwave electric field measurements.

The present application relates to the technical field of quantum precision measurement, in particular to a Roland C signal receiving method and system based on Rydberg atoms, which utilizes atomic antennas to prepare Rydberg atoms in an alkali metal atom gas chamber to obtain an electromagnetically induced transparency (EIT) spectrum; a Roland C signal reaches the alkali metal atom gas chamber through free space, and the EIT spectrum produces an oscillation peak by utilizing the Stark effect of the Rydberg atoms; the coupling laser frequency is locked to the maximum position of the oscillation peak amplitude; by applying a direct current bias voltage to the parallel electrodes built in the alkali metal atom gas chamber, on the one hand, the received Roland C signal is corrected, and on the other hand, the alternating current Stark effect is amplified, so that the receiving sensitivity of the Roland C signal is significantly improved.

The invention relates to the technical field of quantum precision measurement and automatic control, and discloses a Rydberg atom AT split signal-based closed-loop locking detection method and a Rydberg atom AT split signal-based closed-loop locking detection system. The method comprises the following steps: acquiring an EIT signal under the condition of no microwave field, and locking the frequency of coupled laser at a preset reference point to establish a frequency reference; the coupled laser and the detection laser are combined and then collinearly penetrate through the gas chamber; when the to-be-measured microwave field is applied to the gas chamber to generate AT splitting, the laser frequency shifter controls the frequency of the coupled laser to be switched between preset target frequency points; a lock-in amplifier is used for carrying out phase-sensitive detection on a detection laser light path transmission intensity signal, an error voltage signal is generated based on an AT split signal, and error voltage zero crossing points corresponding to two AT split peaks are locked through a servo controller; and calculating the to-be-measured microwave electric field intensity according to the locking point feedback control quantity difference. According to the invention, the measurement precision is improved, the anti-interference capability is enhanced, the working stability is improved, and rapid and stable detection of the microwave electric field is realized.

The invention discloses a microwave electric field detection method based on three-light-excited Rydberg atom eight-wave mixing, and the method comprises the steps: building a microwave electric field detection device based on three-light-excited Rydberg atom eight-wave mixing, enabling a transmission path of decoration light Kd and a transmission path of coupling light Kc to reversely coincide with a transmission path of detection light KP in an atomic gas chamber, and enabling the transmission path of the coupling light Kc to be a transmission path of the detection light KP; a local oscillation microwave electric field KL is emitted to the atomic gas chamber from one side of the atomic gas chamber through the horn antenna; the horn antenna passively receives a signal microwave electric field KS in a free space and loads the signal microwave electric field KS to the atomic gas chamber; by observing the beat frequency electric signal output by the photoelectric detector, it is confirmed that the horn antenna receives the signal microwave electric field KS. Through a three-light excitation Rydberg atom scheme and an eight-wave mixing technology, the frequency resolution and sensitivity of electric field detection are remarkably improved, and a brand new technical path is provided for high-precision microwave electric field detection.

The application provides a quantum sensor based on Rydberg atoms, which comprises a probe light assembly, a coupling light assembly, an atomic gas chamber, a photodetector, a to-be-measured signal assembly, a local oscillator signal assembly and a metasurface structure, and the probe light and the coupling light are reverse collinear; the metasurface structure is arranged on the side wall of the atomic gas chamber, and the to-be-measured electromagnetic wave signal and the local oscillator electromagnetic wave signal are transmitted to the atomic gas chamber through the metasurface structure; the photodetector converts the probe light into an electric signal, and the frequency spectrum data of the electric signal is acquired through a frequency spectrometer. The application realizes the frequency measurement function of the to-be-measured electromagnetic wave signal, and through the high transmission effect of the metasurface structure, the standing wave effect of the electromagnetic wave signal in the atomic gas chamber is weakened, and the electromagnetic wave radiated into the atomic gas chamber has higher transmission efficiency and utilization.

This invention relates to the field of microwave detection technology, specifically to a broadband microwave rapid detection method based on atomic level electric field tuning, which mainly solves the problem of detection limitations in traditional Rydberg atom-based microwave information detection. The broadband microwave rapid detection method based on atomic level electric field tuning includes the following steps: 1) First, a probe light and a coupling light are applied sequentially to a Rydberg atom gas cell, and then the microwave to be measured is applied to the Rydberg atom gas cell; 2) A spatial gradient radio frequency electric field is applied within the Rydberg atom gas cell; 3) The spot of the probe light is projected into an optical camera to form an image set, the pixel signals within the image set are merged, and the splitting response of the EIT-AT spectrum is observed. The electric field strength and frequency of the microwave to be measured are calculated. This invention's detection method achieves the requirement for rapid detection of random microwave signals over a wide frequency range.

This invention relates to the field of microwave remote sensing precision calibration technology, and particularly to a traceable microwave radiation calibration device and method based on the quantum coherence effect of Rydberg atoms with a wave-shaped structure. The device includes: a microwave standard radiation system, a dynamic ring track, a Rydberg atom electric field measurement system, a radiometer receiving antenna, a data acquisition and control system, and a data processing system. The device uses the dynamic ring track to move the microwave transmitting antenna, causing microwave electromagnetic signals to alternately irradiate the Rydberg atom electric field measurement system and the radiometer receiving antenna. The interaction between the microwave electric field and specific Rydberg energy levels induces the Euler-Townes effect, causing energy level splitting and resulting in peak position evolution in the electromagnetically induced transparency spectrum of the atomic laser system. The data processing system calculates the electric field intensity and converts it into the corresponding brightness temperature, thereby calibrating the radiometer receiving antenna.

The application discloses a kind of circulating light path atomic cell structures based on optical super surface, including atomic cell, atomic cell includes cell wall and chamber, chamber is vacuum environment, and chamber is filled with alkali metal atom vapor;The first optical super surface structure and the second optical super surface structure with the same structure are symmetrically arranged on the two sides of the chamber;Atomic cell is provided with probe light input interface and coupled light input interface respectively on two sides;The inside of cell wall is provided with probe light path;Probe light input interface is coaxially arranged with chamber;The application provides an integrated atomic cell structure, reduces the number of optical devices of electric field measurement system, reduces the influence of environmental factors on measurement, improves the portability and practicality of the measurement based on Rydberg atom electric field.The application does not depend on optical platform and does not contain metal element, and the measured electric field will not be distorted, which can be directly used as an electric field measurement probe in the measured electric field.

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

This application discloses a high-precision microwave frequency measurement method and system based on continuous-time crystal phase transitions, belonging to the field of quantum sensing technology. This method utilizes the characteristic of the Rydberg atom system at the critical point of a continuous-time crystal phase transition where the response slope of the detected light transmission signal to the microwave frequency is significantly enhanced, breaking through the resolution limit of traditional linear responses. The system includes a quantum sensing unit, an optical excitation and detection module, a microwave modulation and scanning module, an auxiliary radio frequency field module, and a signal processing and control center. By precisely adjusting the parameters, the system is driven to the vicinity of the critical point, the critical frequency is identified, and its high response slope is used to achieve precise frequency measurement. This invention employs a two-stage measurement process, balancing wide dynamic range and high precision, and can be flexibly tuned to adapt to different frequency bands, possessing broad application prospects, especially in microwave communication, frequency metrology, and other fields with significant technical value.

The invention provides a Rydberg atom partial discharge live detection method, device and equipment, and relates to the technical field of electrical equipment insulation state detection. The method comprises the following steps: controlling the detection light source and the coupling light source to emit two preset laser signals with different line widths; determining an electric field signal detection result according to an acquisition result of the light intensity acquisition system; when it is determined that an electric field is detected according to the electric field signal detection result, a microwave generator is controlled to generate a differential microwave signal with set frequency and set intensity; and obtaining an EIT-AT split atlas, and determining the intensity of the partial discharge electromagnetic wave according to the fluctuation data of the EIT-AT split atlas. According to the method, stable electromagnetic wave signals are introduced in a superheterodyne mode, EIT-AT splitting is adjusted to an area with good linearity for regulation, the intensity of partial discharge electromagnetic waves is determined according to fluctuation data of an EIT-AT splitting atlas, and the partial discharge detection accuracy of the combined electric appliance is improved.

The application discloses a Rydberg atom electric field sensing device and system, and is applied to the field of quantum sensing.The device comprises an atom chamber, a first distributed feedback laser and a second distributed feedback laser.The first distributed feedback laser and the second distributed feedback laser each comprise a laser source resonant cavity formed inside.The first distributed feedback laser and the second distributed feedback laser generate laser based on optical feedback and optical amplification of the laser source resonant cavity inside each of them, and the laser is used as probe light and pump light respectively, and enters from one side of the atom chamber, so that the atoms in the atom chamber reach the excited state and the Rydberg state in turn.The application uses the distributed feedback laser as the pump light and the probe light for exciting the Rydberg atom, provides a miniaturized light source for the Rydberg atom electric field sensing device, improves the integration of the device, has the advantages of miniaturization, is easy to move, is suitable for a harsh outdoor environment, and can realize large-scale integration of chips.

The utility model discloses a microwave quantum sensing probe based on three-photon excitation. The microwave quantum sensing probe comprises a large rectangular prism, an atomic gas chamber, a color separation prism, a small rectangular prism, a first port, a second port, a third port, a detection light input optical fiber collimator, a decoration light and coupling light optical fiber collimator and a detection light output optical fiber collimator. The device is simple and compact in structure, and can solve the problems that an optical system in a conventional microwave quantum measurement system is complex and huge and cannot carry out portable detection. In addition, the device can also be suitable for a Rydberg atom three-photon excitation mode, and can be combined with the Rydberg atom three-photon excitation mode to build a transportable microwave measurement system suitable for the three-photon excitation mode.

The invention provides a microwave electric field detection and communication receiving method and system based on Rydberg atoms. The method comprises the following steps: performing calculation based on a Monte Carlo wave function method of a cold atom system and a hot atom system; on the basis of the Rydberg atom receiving theory, receiving and demodulation of amplitude modulation signals are achieved through the EIT effect and the AT splitting phenomenon of Rydberg atoms. The technical problems that the simulation precision of electric field measurement and communication receiving is low, the applicability to high-precision electric field measurement is low, the calculation complexity is high, and the later efficiency of response results under the Doppler effect is low are solved.

The embodiment of the invention relates to the field of microwave electric field measurement, in particular to a microwave electric field measurement device and method, and the device comprises a laser light source module, a microwave generation module, and a data processing module. The laser light source module is used for exciting Rydberg atoms in the atomic gas chamber and generating an electromagnetic induction transparent spectrum; the microwave generation module is used for generating a microwave signal to be measured, the microwave signal to be measured is radiated to the atomic gas chamber through the horn antenna, and the electromagnetic induction transparent spectrum is split or heterodyne interference occurs due to the microwave signal to be measured; the data processing module is used for collecting electric signals and calculating the microwave electric field intensity by analyzing the splitting frequency spacing of the electromagnetic induction transparent spectrum, and the electric signals are jointly obtained by the laser light source module and the microwave generation module. According to the invention, high-precision measurement of the microwave electric field is realized.

The application discloses a microwave regulation multi-channel frequency hopping device based on Rydberg atoms, which comprises an atomic chamber, probe light enters from one end of the atomic chamber and passes through the atomic chamber, and then is reflected to a photoelectric detector through a polarization beam splitter prism, coupled light is reflected by a mirror, passes through the polarization beam splitter prism and enters the atomic chamber from the other end of the atomic chamber, and the coupled light reflected by the mirror is coincident with the probe light in path and opposite in propagation direction; a local microwave signal generator and an auxiliary microwave signal generator are arranged on one side of the atomic chamber, the local microwave signal generator and the auxiliary microwave signal generator emit microwave signals into the atomic chamber, and the other side of the atomic chamber receives a to-be-measured radio frequency signal; the application further discloses a microwave regulation multi-channel frequency hopping method based on Rydberg atoms, and through reasonable configuration of the frequency of the auxiliary microwave signal and the local microwave signal, cesium Rydberg atoms are flexibly frequency-hopped in six different channels.

The invention discloses a method for realizing multi-channel excitation by using dual-wavelength to excite a dual-microwave field, and relates to a technical scheme of forming dual-wavelength excitation-dual-microwave expansion Rydberg atom working frequency points by combining dual-color optical frequency hopping and a microwave expansion frequency point method. The double-color light frequency hopping technology is used for selecting an initial working frequency point, and the excitation energy level corresponding to the single color light is further finely regulated, controlled and expanded through the double microwave fields. In other words, on a quantum state corresponding to a single color light excitation state, double microwaves interact with an atomic energy level to further generate a plurality of different microwave transition resonance states, so that a plurality of available sub-frequency points can be derived under each light frequency point, the rapid frequency point switching capability is improved, and the frequency point switching efficiency is improved. The problems of low frequency resource utilization rate, difficulty in frequency point switching and the like existing in a current Rydberg atom excitation scheme are solved.

The present disclosure relates to a method and device for the tomography of a Rydberg atom graph using a location-adjustable ancilla qubit. The method and device may be configured to prepare at least one ancilla qubit around a Rydberg atom graph of interest having at least one atom, measure interactions between the Rydberg atom graph and the ancilla qubit while adjusting a location of the ancilla qubit around the Rydberg atom graph, and reconstruct a quantum state of the Rydberg atom graph based on the measured interactions.

This invention discloses a holographic measurement method for low-frequency AC electric fields based on Rydberg atoms, belonging to the field of Rydberg atom measurement and electric field measurement. The method includes: establishing a relationship model between light intensity and electric field strength based on the light intensity of probe light transmitted through an atomic gas cell under different field strengths; identifying the critical inflection point representing the light intensity saturation state in the light intensity curve, and determining the saturation region based on the critical inflection point; removing the saturation region from the light intensity curve to obtain an effective light intensity dataset; obtaining the electric field strength corresponding to each effective light intensity data using the relationship model between light intensity and electric field strength based on the effective light intensity dataset; and performing sinusoidal data fitting on the electric field strength corresponding to each effective light intensity data, extracting the amplitude, frequency, and phase of the sinusoidal quantity from the fitted field strength function. This invention solves the problem that existing methods cannot obtain the amplitude, frequency, and phase information of sinusoidal signals when measuring low-frequency electric fields in power systems.

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.