19 results about "Quantum noise" patented technology

The application relates to the technical field of quantum precision measurement, and discloses an integrated wide-temperature-range diamond nitrogen vacancy color center quantum noise spectrometer, which comprises an integrated optical path module arranged outside a low-temperature constant temperature module, an electronic module, an integrated laser module and a data processing module; the integrated optical path module is connected with the electronic module and the integrated laser module through an optical fiber and is spatially coupled with the low-temperature constant temperature module; the electronic module comprises a double-path chip-level signal generation path; a microwave antenna and a probe are arranged in the low-temperature module; by mechanically decoupling the integrated optical path module and the low-temperature module, vibration interference caused by the refrigeration process is effectively blocked, a laminated near-field coupling structure and an integrated control circuit are matched, high-stability in-situ quantum sensing under a wide-temperature-range environment is realized, the integration degree and the measurement signal-to-noise ratio of the system are improved, and the overall volume and the manufacturing cost of the whole machine are reduced.

A light emitting device and method thereof, and a gas analysis system and method thereof, are disclosed. The light emitting device includes: an optical comb light source configured to generate an initial light signal; an encoding module configured to encode the initial light signal based on a preset comb code to form a light signal to be processed; and a modulation module configured to perform quantum noise compression on the light signal to be processed to form an emitted light signal. This invention belongs to the field of precision measurement. Through a collaborative architecture of "compressed optical comb + computational encoding," optical comb spectroscopy technology achieves improvements in multiple dimensions, including sensitivity, environmental adaptability, speed, and system complexity.

This invention discloses a method and device for detecting the load at the charging port of an electric vehicle charging pile, relating to the field of charging safety technology. The method includes: acquiring an electrical signal from the charging port; extracting a clean load response signal using a quantum noise-resistant processor based on Majorana fermion operators; inputting the clean load response signal into a pulse neural network autoencoder to generate a neural pulse sequence through a pulse firing mechanism; performing time-frequency domain transformation on the neural pulse sequence to reconstruct a complex impedance tensor, and solving the eigenvalue sequence of the complex impedance tensor; embedding the eigenvalue sequence into a five-dimensional anti-de Sitter space boundary based on the AdS / CFT duality principle, and generating a three-dimensional holographic tomographic map by solving the Einstein field equations relating the volume to the boundary; this invention achieves topological separation of noise and load signal through a Majorana zero-mode waveguide channel, solving the problem of insufficient high-frequency noise suppression in dynamic load scenarios.

The present application relates to the field of spectral analysis, and relates to an absorption spectrometer and a direct measurement method of absorption light intensity. The present application provides an absorption spectrometer which can directly measure absorption light intensity. The absorption spectrometer comprises a light source assembly, a sample cell, a semi-transparent mirror and a light detector. The absorption spectrometer also provides a direct measurement method of absorption light intensity. In the front light path of two coherent lights, a same sample cell is placed in each light path. The optical path of one light is adjusted until the output of the light detector included in the absorption spectrometer is minimum. Then, a sample to be measured is added to one sample cell, and a blank solution is added to the other sample cell. At this time, the light detector measures the intensity of the remaining light which is not completely cancelled after the convergence of the two lights, i.e. the intensity of the light absorbed by the sample to be measured, i.e. the absorption light intensity. The absorption spectrometer provided by the present application detects absorption light intensity, while the traditional absorption spectrometer detects absorbance. Changing the detection of absorbance to the detection of absorption light intensity can avoid the quantum noise of a large signal from drowning out a weak signal, thereby greatly improving the detection sensitivity of the absorption spectrometer.

The application relates to a method, device and equipment for anti-deepfake speech based on quantum resonance peak disturbance, wherein the method comprises the following steps: reading an original speech signal, extracting a fundamental frequency and a formant frequency of the original speech signal; creating a parameterized quantum circuit to generate quantum noise; adding the quantum noise to the extracted fundamental frequency and formant frequency to obtain a disturbed signal; and preprocessing the disturbed signal to obtain a reconstructed speech signal. The optimized quantum noise generated by the quantum neural network can effectively interfere with the learning and generation of speech features by a deepfake model. Through the design of a loss function and the adjustment of an optimization algorithm, the speech after adding the noise is ensured to have the smallest difference in hearing from the original speech.

A system to secure digital in-transit communication is disclosed. It includes true random bits generation, a secure digital key distribution and an encryption system for broad use. It offers post quantum-resistant characteristics. The system uses true random bits generated from vacuum quantum fluctuations. The distribution of these bits is protected by recorded quantum noise and works in standard communication channels.

According to the high-signal-quality physical layer encrypted free space optical communication method and system provided by the invention, quantization noise can be effectively controlled through DSM modulation, high-frequency noise is removed, so that high quality and low distortion of signals are kept in the transmission process, and especially in long-distance and severe-environment communication, the high-quality and low-distortion performance of the signals is ensured. And the signal stability can be obviously improved. Wherein in the physical layer encryption process of quantum noise stream encryption and the like, quantum noise or random phase jump is used as a means for generating an encrypted signal to introduce certain noise, the noise shaping characteristic of DSM modulation plays an important role, the noise is concentrated in a high-frequency area to reduce low-frequency interference caused by the quantum noise, and the quantum noise stream encryption is realized. The signal quality is optimized, and the bit error rate is reduced. Interference caused by quantum noise and external environment factors can be effectively eliminated in the signal transmission process, and therefore the transmission stability of a system and the reliability of signals are improved.

The invention discloses a communication system, and relates to the technical field of secret communication. The communication system comprises a signal generation modulation module and a signal detection demodulation module which are in communication connection. A signal generation modulation module is used for splitting an initial optical signal into first polarized light and second polarized light which are orthogonally polarized; generating a composite optical signal based on the first polarized light, the second polarized light, the randomly distributed binary sequence signal, the multi-system sequence signal obeying Gaussian distribution, the quantum noise stream encryption operation, the carrier wave of the first frequency and the carrier wave of the second frequency; performing power attenuation on the composite optical signal, and outputting a target optical signal; and the target optical signal is sent to the signal detection demodulation module. A signal detection demodulation module in the application is used for receiving a target optical signal; generating two groups of beat frequency electric signals based on the local oscillation optical signal and the target optical signal; and processing the two groups of beat frequency electric signals to generate binary sequence signals and multi-system sequence signals.

A receiver for a quantum signal comprising a mixer for mixing or interfering a local oscillator signal and the quantum signal to form interference signals; and a pair of balanced photodetectors for outputting a difference signal in response thereto. The receiver further comprises electronics for amplifying and determining a quadrature component of the quantum signal from the difference signal with quantum noise limited precision. Methods and systems for using the receiver are further disclosed.

The application discloses a data sending and receiving method, device and storage medium, which comprises the following steps: performing forward error correction coding on data; performing probability shaping on bases; multiplying the probability-shaped bases as amplitudes and the FEC-corrected data as + / symbols; and sending the multiplied bases and data. The bases are subjected to probability shaping; the probability-shaped bases are multiplied as amplitudes and the received probability-shaped bases and data are multiplied as + / symbols; and the multiplied bases and data before FEC correction are obtained, and the data is obtained through FEC forward error correction. According to the application, the frequency of using constellation symbol points of a quantum noise stream encryption system can be changed, the quantum noise can be better overlapped with symbols, and the secrecy of keys and bases is improved.

The invention discloses a signal transmission method based on three-dimensional constellation step coding, and the method comprises the steps: carrying out the XOR encryption and sub-block scrambling of initial signal data, and generating a 64QAM (Quadrature Amplitude Modulation) signal; after up-sampling, actively introducing an error sequence to generate a state base; signal step coding is carried out through a quasi-quantum noise flow method, and information hiding of 64QAM signals is achieved; the ultra-high-order signal is scrambled and encrypted and then enters an optical fiber channel after passing through an OFDM system, and a received signal is obtained; and demodulating the state base, regenerating a scrambling sequence, performing chaos scrambling recovery after recovery decryption, reducing the order of the signal to a 64QAM signal in a three-dimensional space, and performing XOR recovery to obtain initial data. According to the invention, 64QAM is designed in a three-dimensional space, the secret key is used as a state base to realize accompanying transmission, the safety performance of the signal is further improved in combination with a chaotic system, and finally, high-performance and high-safety signal transmission is realized.

The application discloses an X-ray machine projection parameter calibration method and relates to the technical field of medical image and diagnosis equipment. A double-channel feature extraction module shields a high-noise area response in a spatial dimension dynamically, meanwhile, a channel gain mechanism is utilized to retain key anatomical structure features, and quantum noise interference on edge positioning is effectively inhibited. A generative adversarial framework converts parameter regression into an optimization task driven by reconstruction quality, a discriminator is based on a structural similarity constraint of a pre-trained deep feature, and a generator is forced to output an offset meeting a physical projection rule, thus breaking a bottleneck that an optimization algorithm falls into a local extreme value under low signal-to-noise ratio data. Triple constraint terms in a loss function balance parameter precision and image authenticity through a weight self-adaptive mechanism, geometric parameters are converged quickly in an early training stage, texture consistency is strengthened in a middle and late training stage, and artifact distortion caused by insufficient dose is reduced.

The application discloses a quantum-enhanced hollow photonic crystal fiber gas sensor, which is characterized by comprising a laser, a coarse wavelength division multiplexer, an erbium-doped fiber amplifier, a filter, a polarization controller, a polarization beam splitter, a coupler, a dispersion-shifted fiber, a fiber delay line, a fiber isolator, a single-mode fiber, a hollow photonic crystal fiber, a balanced detector and a spectrum analyzer; the application uses quantum entangled double beams generated after four-wave mixing, which has high quantum correlation, and the intensity difference quantum noise of each mode is reduced; the quantum correlation noise of the probe light and the reference light is subtracted, a noise floor lower than the shot noise limit is generated, and the signal annihilated in the quantum noise can be detected, so that the super high sensitivity measurement beyond the quantum noise limit is realized. The quantum-enhanced hollow photonic crystal fiber gas sensor has the advantages of high sensitivity, good stability, high practicability and the like.

The invention discloses an iron resonance fluorescence laser radar temperature and wind speed inversion error analysis method, and belongs to the technical field of low ionosphere detection. According to the iron resonance fluorescence laser radar temperature and wind speed inversion error analysis method, an iron resonance fluorescence laser radar simulation model is constructed, and photon echo signals are simulated in combination with an NRLMSIS-00 atmosphere model and actually measured iron atom density data; analyzing the influence of laser frequency jitter and light quantum noise on the inversion precision by adopting a Monte Carlo method; then, the error performance of a frequency scanning method and the error performance of a three-frequency ratio method are compared, it is proved that the error of the frequency scanning method in temperature inversion is lower, and the iron resonance fluorescence laser radar temperature and wind speed inversion error analysis method can provide guidance for systematic error modeling and parameter design of an iron resonance fluorescence laser radar; and the accuracy of atmospheric temperature and wind speed inversion can be improved.

This application discloses a quantum error mitigation method and related apparatus based on zero-noise compilation. The method includes: constructing a zero-noise circuit for the original quantum circuit, wherein the original quantum circuit and the zero-noise circuit have the same circuit structure, and the product of multiple quantum logic gates included in the zero-noise circuit is equivalent to a unit gate; determining the quantum state fidelity in the quantum noise channel based on a first measurement result of the zero-noise circuit; and determining the noise-free operation result of the original quantum circuit based on the quantum state fidelity and a second measurement result of the original quantum circuit. This application embodiment achieves noise-free operation result estimation of the original quantum circuit by obtaining quantum noise information through a zero-noise circuit, which is beneficial for reducing noise in quantum systems to an acceptable order of magnitude.

The application discloses a kind of general optical network endogenous security protection system based on quantum noise flow encryption, belong to optical communication, optical network technical field.The application is aimed at the demand of multiple modulation formats of flexible optical transport network, in the sending node of OTN, with the transmitter of general modulation format from binary phase shift keying (BPSK) to sixty-four modulation formats (64QAM) format change, the transmitter is mainly composed of the above-mentioned modulation format digital signal processing part, continuous wave laser and quadrature phase modulator.In the receiving node of OTN, with modulation format identification module from BPSK to 64QAM and the module based on each modulation format phase noise sets different quantization threshold limit to generate seed key.Based on the above fiber channel features, the seed key generated by receiver is negotiated and expanded, the physical layer quantum noise flow encryption of optical network is realized, so that the security problem in existing flexible optical network is effectively solved.

The invention discloses a double-difference low-noise broadband balance zero-beat detector and an experiment system, and belongs to the technical field of quantum optics. Signals are taken from the two sides of the two photodiodes, low-frequency differential amplification is achieved through the operational amplifier summing circuit, alternating-current differential signals are directly output from the middle of the two photodiodes, and the alternating-current differential signals are sent to the transimpedance amplifying circuit and the proportional amplifying circuit to measure quantum noise of incident light. Through the circuit symmetry design, direct current and alternating current differential signals are directly extracted on the two sides of the photodiode, and the problems that a balance zero-beat detector used in existing quantum optical compression state light field measurement is high in electronic noise, and broadband noise measurement and precise phase locking cannot be considered at the same time are solved. The method can be used for phase locking and noise measurement of a quantum state light field at the same time, full-band utilization of light field signals can be achieved, and the influence of electronic noise on measurement is reduced.

The invention discloses a passive sensor composite verification system and method based on dynamic field intensity modulation, and the method comprises the following steps: S1, carrying out the synchronous collection of multiple parameters, and finally obtaining the environment temperature and humidity gradient and equipment load fluctuation parameters; s2, quantum noise suppression processing; s3, carrying out field intensity modeling and dynamic optimization, and constructing a four-dimensional space-time field intensity model containing a geological conductivity correction term; s4, multi-physics field interference separation; and S5, generating a dynamic verification parameter, performing orthogonalization processing on the decoupling parameter, constructing a transfer function model containing a time delay factor, and outputting the transfer function model to target equipment to execute verification. Through the synergistic effect of the three-dimensional orthogonal electromagnetic induction array and the quantum noise suppression technology, the environmental noise and the target signal are effectively separated. Quantum state coding and dynamic decoupling control significantly reduce the influence of a de-coherence effect, so that the capturing ability of weak electromagnetic field signals is improved by two orders of magnitude compared with a traditional method, and a high-fidelity data basis is provided for subsequent processing.

A quantum noise mitigation system can comprise a memory that stores, and a processor that executes, computer executable components comprising a pulse calibration component that, for controlling execution of a quantum gate of a quantum circuit, calibrates an echo extender tone parameter for a set of echo extender tones of an echo pulse sequence, wherein the pulse calibration component inserts the set of echo extender tones into the echo pulse sequence of an initial pulse sequence resulting in generation of a modified pulse sequence for use in controlling the execution of the quantum gate, and a parameterizing component that parameterizes the set of echo extender tones using a scalable stretch factor for stretching respective durations of the set of echo extender tones.