81 results about "Quantum control" patented technology

The invention discloses a method for detecting a low-frequency electromagnetic field based on Rydberg atoms. According to the method, on the basis that Rydberg atoms have a unique response mechanism for an external electric field and a magnetic field, the Rydberg atoms can convert modulation of a low-frequency electromagnetic field into relevant physical quantity changes of a detection light field under an appropriate quantum regulation and control means, and therefore precise measurement of the low-frequency electromagnetic field is achieved; according to the method, a stable local bias field is applied to the atomic gas chamber, so that the measurement process occurs in a linear conversion area, and the measurement accuracy and sensitivity are remarkably improved; furthermore, the gas chamber condition, the laser driving system, the detection light path and the specific frequency component extraction process are optimized, so that the signal-to-noise ratio of low-frequency electromagnetic field signal measurement can be remarkably improved, and the detection capability of the system is enhanced. According to the method and device, the design thought is clear, the structural complexity is low, good environmental adaptability is shown, and an efficient and reliable means is provided for low-frequency electromagnetic field measurement.

This disclosure relates to quantum computing systems including a quantum processor that implements one or more operations on multiple qubits and a distributed data processing system programmed to perform calculations to determine control sequences that, when applied to the quantum processor, reduces decoherence, decoherence-induced errors, and control-imperfection-induced errors on the one or more operations on the multiple qubits. A user interface device remote from the distributed data processing system receives from a user of the quantum processor characteristics of the quantum processor including operational constraints and / or desired performance, and sends the characteristics to the data processing system to cause the data processing system to perform the calculations to determine the control sequence based on the characteristics.

Methods and systems for classical processing in a quantum controller.

A quantum information processing system may comprise a quantum mechanical system capable of exhibiting transitions between a plurality of eigenstates; and a quantum control environment, wherein the quantum control environment eigenstates is capable of exhibiting modes from a continuous spectrum and is coupled to the quantum mechanical system at at least one coupling location, wherein said coupling is characterized with a set of parameters of the quantum mechanical system, and wherein a selected combination of the at least one coupling location and the set of parameters intentionally causes to suppress at least one of said transitions when intentionally changing a state of the quantum mechanical system by the quantum control environment.

The invention discloses a chip packaging test production line performance control method based on reinforcement learning, and relates to the technical field of quantum regulation and control, and the method comprises the steps: generating a joint state vector; inputting the joint state vector into a pre-trained reinforcement learning strategy model, and when a high-risk state is detected, triggering a causal intervention mark, and generating a frequency band reservation instruction, a forced forbidden instruction set and a quantum regulation and control instruction set; transmitting a frequency band reservation instruction, a forcible forbidding instruction set and a quantum regulation and control instruction set to a radio frequency test machine and chip packaging equipment through a communication interface, distributing a low-load test channel, forbidding a high-risk channel and adjusting temperature and pressure; and collecting test data of the chip function test, verifying the compliance of the test data, and generating a qualification report. According to the method, intelligent sensing and causal reasoning of the running state of the chip packaging test production line are realized through the reinforcement learning strategy model and the causal rule map.

Apparatus and method for a low-power quantum controller. For example, one embodiment of an apparatus comprises: a low-power quantum control chip to process a first portion of quantum program code associated with a quantum computing application, the low-power quantum control chip configurable within a dilution refrigeration unit, the low-power quantum control chip comprising: an interface to couple the quantum control chip to a computer which is to execute a second portion of the quantum program code associated with the quantum computing application; a Static Random Access Memory (SRAM) to store the first portion of quantum program code; a compute unit to execute the first portion of quantum program code during execution of the quantum computing application and responsively generate control signals; routing hardware logic to route the control signals; a plurality of digital signal processor (DSP) units coupled to the routing hardware logic, at least one DSP of the plurality of DSPs to receive one or more of the control signals and responsively generate analog qubit control signals to control qubits of a quantum processor.

The invention relates to the technical field of semiconductor ultra-precision machining, and discloses a three-light coaxial laser-induced wafer splitting system and a quantization stress field regulation and control method. Comprising a quantum dot dynamic marking system, a topological photonics laser modification module, a quantization stress regulation and control algorithm, photonic crystal waveguide laser processing and stress field quantum regulation and control verification. According to the three-beam coaxial laser-induced wafer splitting system and the quantization stress field regulation and control method, a non-Hermite photonic crystal waveguide technology regulates and controls the phase of a laser beam through topology photonics, so that a lattice-modified subsurface quantum tunneling effect (the error of penetration depth is less than 50nm) is realized; the three-light coaxial holographic monitoring system integrates laser processing, quantum dot microscopic imaging (with the resolution of 0.5 nm) and digital holographic interference measurement to realize crack propagation dynamic tracking, and the quantum dot holographic tracking technology adopts CdSe / ZnS quantum dots to mark crack tips and combines digital holographic interference measurement (with the resolution of 0.3 nm) to realize crack three-dimensional morphology reconstruction.

The invention belongs to the field of quantum computing, and particularly relates to a distortion correction method for a quantum measurement and control link and a quantum computer, and the method comprises the steps: carrying out fractional expansion on a system function in a general expression form, and obtaining a system function expressed by a subitem of a target system function and a sum of products of corresponding coefficients, the target system function subitems are determined according to signal response characteristics of the quantum measurement and control link and comprise a pure zero item, a real pole item and a complex pole item, the pure zero item represents impulse response of finite length of the quantum measurement and control link, the real pole item represents exponential response of the quantum measurement and control link, and the complex pole item represents impulse response of finite length of the quantum measurement and control link. The complex pole item represents the oscillation attenuation response of the quantum measurement and control link; determining the reciprocal of the system function of the quantum measurement and control link as a distortion correction digital filter; a distortion correction digital filter is arranged on the quantum measurement and control link to correct signal distortion of the quantum measurement and control link. According to the invention, the distortion of the quantum measurement and control link can be rapidly corrected.

The application discloses a kind of based on ensemble rare earth ions double quantum bit controlled gate construction method, it is related to quantum control technical field, it includes to double quantum bit frequency site selection, and respectively as control bit, target bit;Utilize the blocking effect generated by the dipole-dipole interaction between double quantum bits to construct controlled gate, including: to control bit apply light pulse driving control bit is from ground state transition to excited state;To target bit apply single quantum gate to drive its evolution, and apply compensation pulse;To control bit apply light pulse driving control bit from excited state de-excitation to ground state.The application utilizes the interaction of the light pulse and quantum system medium that can be optimized to produce arbitrary geometric quantum logic gate on target quantum bit, and simultaneously by using the blocking effect caused by dipole-dipole interaction, the evolution of target bit quantum bit can be constrained by control bit.

The application discloses an instruction processing system, a quantum control system and a quantum computer, and is used for outputting waveform data of a pulse signal for operating a quantum bit. The instruction processing system comprises a communication module configured to receive waveform parameter instructions sent by an upper computer; wherein the waveform parameter instructions comprise a first parameter, a second parameter and a waveform coefficient of a rising edge and a falling edge of the pulse signal; a preset parameter configuration module configured to configure the first parameter and the second parameter; and a waveform data generation module configured to generate waveform data of a complete waveform of the pulse signal according to the first parameter, the second parameter and the waveform coefficient. The application generates the waveform data of the pulse signal by using the waveform parameter instructions in the lower computer, and can solve the problems that the waveform data of the pulse signal is large, the waveform data is downloaded to the lower computer to occupy the memory, the transmission is slow and the computing efficiency of the quantum computation is affected, and the computing efficiency of the quantum computation can be greatly improved.

Provided are quantum control methods and systems. The method includes generating a control pulse in a quantum system, determining a measurement of a state of the quantum system in response to the control pulse, determining a control pulse correction based on the control pulse, the measurement of the state of the quantum system, and a model reference state, modifying the control pulse based on the control pulse correction, resulting in a modified control pulse, and generating the modified control pulse in the quantum system.

A quantum control apparatus, a quantum control system, and a quantum computer are provided. The quantum control apparatus (10) includes a backplane (120), a routing module (130), at least one quantum state control module (140), at least one frequency control module (150), and at least one measurement module (160). The quantum state control module (140), the frequency control module (150), the measurement module (160) and the routing module (130) are arranged in sockets of the backplane (120). The quantum state control module (140), the frequency control module (150), and the measurement module (160) are all in communication connection with the routing module (130), and perform data interaction via the routing module (130). The volume and cost of a quantum control system dedicated to a quantum chip and constructed by the quantum control apparatus are greatly reduced, integration and expansion of the quantum control system are easy to implement, and the number of controlled qubits can be flexibly configured, such that measurement and control requirements of a high-quantum-bit quantum chip can be met.

The present invention provides a configuration management method for a superconducting quantum control system, which can be applied to the field of quantum information processing technology. The method includes: determining the data structure and data constraints of configuration items used to manage the superconducting quantum control system; setting an application programming interface for communication between the superconducting quantum control system and external devices, and using the application programming interface to manage external device operation requests for configuration items; synchronizing data on the configuration items, backtracking and querying the configuration items through data logs, and managing user permissions in the configuration items; performing conflict detection and processing on the real-time update process of configuration items when multiple users are running multiple tasks; storing the output data of the superconducting quantum control system, and configuring the scalability and compatibility of the superconducting quantum control system. The present invention also provides a superconducting quantum control system.

The application discloses a synchronous triggering system and method and a quantum control system, and the synchronous triggering system comprises a central control device, a plurality of routing board cards and a plurality of function board cards, and the synchronization triggering of a triggering signal is ensured through a three-stage triggering synchronization system, wherein the first stage provides a plurality of groups of triggering signals for the corresponding routing board cards for the central control device, and the initial time of the output of each group of triggering signals is adjusted so that the time when each cabinet receives the triggering signal is the same; the second stage is that the communication lines from each routing board card to the plurality of function board cards connected thereto are equal in length; and the third stage is that the triggering signals reach the plurality of data processing devices at the same time after the AND operation processing of the AND gate chips so as to synchronously trigger the data processing devices.

The application discloses a phase screen-based array photonic orbital angular momentum beam quantum control system, and belongs to the technical field of quantum control.The application is used for solving the problem of mutual overlapping and interference among sub-beams of an array photonic orbital angular momentum beam.The application comprises a laser, a beam shaping unit, a polarization control unit and a quantum state control unit;the beam shaping unit is used for spatially filtering and expanding a laser beam generated by the laser to generate parallel light beams;the polarization control unit is used for performing polarization control on the parallel light beams output by the beam shaping unit to generate linearly polarized light beams with horizontal polarization states;the quantum state control unit is used for performing array photonic orbital angular momentum control on the linearly polarized light beams to obtain array photonic orbital angular momentum light beams, and each sub-beam in the array is independent;and the application can be used for generating array photonic orbital angular momentum light beams with independent sub-beams through a compact optical path.

A messaging system for a distributed quantum system (e.g. a quantum control system and / or a quantum error correction unit). The system has a plurality of real-time units (e.g. decoders, sequencers or

The invention discloses a clock triggering unit of a quantum measurement and control system, a related method, a system and equipment. The unit comprises a main control module, a clock distribution circuit and a trigger, the master control module configures and manages the clock distribution circuit and the trigger, and works based on a clock distributed by the clock distribution circuit; the primary clock distributor is used for distributing a plurality of primary clock output signals based on an input reference signal of a reference source, and respectively providing the primary clock output signals to the main control module and the plurality of secondary clock distributors; the secondary clock distributor selects a signal distribution mode according to the frequency of the reference source, and outputs multiple paths of secondary clock output signals to a first signal interface of the measurement and control case based on the distribution mode and the primary clock output signal; and the trigger is used for processing trigger signals output by each port of the main control module and outputting the processed trigger signals to the second signal interface of the measurement and control case. Multiple paths of high-quality triggering and clock signals can be output, the signal frequency can be flexibly selected, and the requirements of multiple quantum bits for clock signals with different frequencies are met.

The application belongs to the field of quantum information, and discloses a quantum control system and a quantum computer, wherein the quantum control system comprises at least one signal processing device and at least one radio frequency transceiver device, each of the signal processing devices comprises a first backboard, a plurality of first signal processing board cards, a plurality of second signal processing board cards and a routing board card are plugged on the backboard connector of the first backboard, the plurality of first signal processing board cards and the plurality of second signal processing board cards are connected with the routing board card; the second signal processing board card is used for generating a low-frequency signal; the radio frequency transceiver device is connected with the first signal processing board card, and the radio frequency transceiver device and the first signal processing board card connected therewith are used for generating and receiving a high-frequency signal. The quantum control system has high integration and strong expansibility, and the system has good overall coordination, so that the measurement and control requirements of a high-qubit quantum chip can be met.

The present invention is synthetic neurons and networks with feedback quantum tunneling memristors designed to mimic biological neurons. The memristor hardware is formed from a 4.2 nm thick layer of atomic layer deposited ionic hafnium oxide and niobium metal and inserted in the positive and negative feedback of an analog spiking oscillator. When operated at room / warm temperatures, these memories have memristive properties and enable the artificial neuron circuits to produce adaptive spiking behavior. When neural networks are formed of the synthetic neurons, pronounced hybrid chaotic / non-chaotic modes with increased complexity are observed and itinerant behavior emerges. Cryogenic cooling of the memristors into the superconducting Josephson tunneling regime at 8.1 K reveals the influence of quantum control effects.

In a quantum computer, quantum algorithms are performed by exciting a qubit with a quantum control pulse. This quantum control pulse is an electromagnetic RF signal that is generated at baseband according to an analog waveform. An application digitally generates samples of this analog waveform using multiple classical processors that control multiple physical channels in parallel.

Examples described in this disclosure relate to sub-kelvin control systems and methods for scalable quantum control. An example system includes a first cooling sub-system operable to maintain an operating temperature for a first device within a first sub-kelvin temperature range. The system further includes a second cooling sub-system, separate from the first cooling sub-system, operable to maintain an operating temperature for a second device, different from the first device, within a second sub-kelvin temperature range. The first sub-kelvin range may comprise a range between 50 milli-kelvin (mK) to 999 mK and the second sub-kelvin range may comprise a range between 1 mK to 299 mK. The combination of the first cooling sub-system and the second cooling sub-system is configured to maintain a temperature gradient between the first device and the second device despite the first device and the second device being in close proximity to each other.

Disclosed herein is a computer-implemented method for generating an output signal which approximates a desired signal, the output signal being for use in a quantum control system. The desired signal comprises a first and a second region, the first region being symmetric with the second region, and the desired signal is segmented into a plurality of segments. The method comprises retrieving, from one or more memory elements, one or more first parameter values for each segment in the first region, and using a first iterative algorithm and the retrieved one or more first parameter values to generate at least one value of the output signal for each segment in the first region. The method further comprises using a second iterative algorithm and one or more second parameter values to generate at least one value of the output signal for each segment in the second region, wherein the one or more second parameter values are generated based on the one or more first parameter values.

The application discloses an instruction processing system, method, quantum control system and quantum computer. The instruction processing system comprises a state starting module, a cycle period determining module and a data generating module. The state starting module is used for sending a data output request according to a waveform parameter instruction sent by an upper computer. The cycle period determining module is used for determining a cycle clock period according to a first quantity of waveform data output by the data generating module in a single clock period and the amplitude repetition number. The data generating module is used for generating waveform data of rising edges and falling edges of a pulse signal waveform according to a starting amplitude, an amplitude repetition number, an amplitude increment and a total quantity of waveform data in each cycle clock period in response to the data output request and outputting the waveform data. The application adopts a waveform parameter instruction to generate waveform data of a pulse signal in a lower computer, can solve the problems that a large quantity of waveform data of the pulse signal is sent to the lower computer to occupy memory and slow transmission affects the computing efficiency of quantum computing, and can greatly improve the computing efficiency of quantum computing.

This disclosure relates to quantum computing systems including a quantum processor that implements one or more operations on multiple qubits and a distributed data processing system programmed to perform calculations to determine control sequences that, when applied to the quantum processor, reduces decoherence, decoherence-induced errors, and control-imperfection-induced errors on the one or more operations on the multiple qubits. A user interface device remote from the distributed data processing system receives from a user of the quantum processor characteristics of the quantum processor including operational constraints and / or desired performance, and sends the characteristics to the data processing system to cause the data processing system to perform the calculations to determine the control sequence based on the characteristics.

The application discloses a quantum bit calibration method and device, a quantum control system and a quantum computer. Whether the working point of a to-be-tested quantum bit drifts is determined, the working point including a working voltage and a quantum bit frequency corresponding to the working voltage. If the drift occurs, a gradient optimization algorithm and a Ramsey experiment are used to obtain the drift amount of a degenerate point of the to-be-tested quantum bit. All working points of the to-be-tested quantum bit are calibrated based on the drift amount of the degenerate point of the to-be-tested quantum bit. The scheme of the application uses the gradient optimization algorithm and the Ramsey experiment to obtain the drift amount of the degenerate point of the to-be-tested quantum bit, can effectively realize the calibration of the working point of the quantum bit, and only needs to test the drift amount of the degenerate point, thereby effectively improving the calibration efficiency of the quantum bit.

An atom control architecture based on VIS-IR photonic integrated circuit (PIC) technology is characterized by (1) visible (VIS) and near-infrared (IR) wavelength operation, (2) channel counts extensible beyond 1000s of individually addressable atoms, (3) high intensity modulation extinction and (4) repeatability compatible with low gate errors, and (5) fast switching times. A 16-channel SiN-based APIC with (5.8±0.4) ns response times and <−30 dB extinction ratio at a wavelength of 780 nm. Based on a complementary metal-oxide-semiconductor (CMOS) fabrication process, this atom-control PIC (APIC) technology can be used for atomic, molecular, and optical physics and emerging applications, from quantum computers with cold atoms or ions to quantum networks with solid-state color centers. This APIC technology is especially suitable for scalable quantum information processing based on optically programmable atomic systems.

The application discloses a quantum chip control method, a quantum control system and a quantum computer. A three-dimensional analysis model including coupling relationships between same-category elements on a quantum chip and coupling relationships between different-category elements is constructed, and then a working point of a quantum bit in the quantum chip to be measured is adjusted based on the three-dimensional analysis model. The scheme provided in the application can meet the demand of a large-scale quantum chip by constructing a three-dimensional analysis model of coupling relationships between an analysis reading bus layer, a resonant cavity layer and a quantum bit layer, and can meet the demand of the large-scale quantum chip from the overall structure and environment of the chip, and can make up for the blank of the prior art.

In a quantum computer, quantum algorithms are performed by a qubit interacting with multiple quantum control pulses. The quantum control pulses are electromagnetic RF signals that are generated digitally at baseband and sent, via asynchronous ports, to DACs that feed an RF upconversion circuit. For synchronization, each asynchronous port is coupled to a multi-tap delay line. The setting of the multi-tap delay line is determined by a function of the port's setup-and-hold time. This function is trained, via machine learning, to be applicable across a variety of ports.

The invention discloses a double-quantum-bit controlled gate construction method based on ensemble rare earth ions, and relates to the technical field of quantum control, and the method comprises the steps: carrying out the site selection of double-quantum-bit frequency, and taking the double-quantum-bit frequency as a control bit and a target bit; a controlled gate is constructed by using a blocking effect generated by dipole-dipole interaction between double quantum bits. The method comprises the following steps: applying an optical pulse to a control bit to drive the control bit to transition from a ground state to an excited state; applying a single quantum gate to the target bit to drive the target bit to evolve, and applying a compensation pulse; and applying an optical pulse to the control bit to drive the control bit to be de-excited from the excited state to the ground state. According to the invention, any geometric quantum logic gate is generated on a target quantum bit by utilizing the interaction of optimizable light pulses and a quantum system medium, and meanwhile, the evolution of the target bit quantum bit can be restrained by a control bit by utilizing a blocking effect caused by dipole-dipole interaction.