41 results about "Quantum control" patented technology

An efficient simulation system of quantum algorithm gates for classical computers with a Von Neumann architecture is described. In one embodiment, a Quantum Algorithm is solved using an algorithmic-based approach, wherein matrix elements of the quantum gate are calculated on demand. In one embodiment, a problem-oriented approach to implementing Grover's algorithm is provided with a termination condition determined by observation of Shannon minimum entropy. In one embodiment, a Quantum Control Algorithm is solved by using a reduced number of quantum operations.

A modular quantum computer architecture is developed with a hierarchy of interactions that can scale to very large numbers of qubits. Local entangling quantum gates between qubit memories within a single modular register are accomplished using natural interactions between the qubits, and entanglement between separate modular registers is completed via a probabilistic photonic interface between qubits in different registers, even over large distances. This architecture is suitable for the implementation of complex quantum circuits utilizing the flexible connectivity provided by a reconfigurable photonic interconnect network. The subject architecture is made fault-tolerant which is a prerequisite for scalability. An optimal quantum control of multimode couplings between qubits is accomplished via individual addressing the qubits with segmented optical pulses to suppress crosstalk in each register, thus enabling high-fidelity gates that can be scaled to larger qubit registers for quantum computation and simulation.

The invention relates to a precise control method of an atom spin SERF (Self-Exchange Relaxation-Free) state for stabilizing an atom spin device, which comprises the following steps that firstly, a precise equation is established for the atom spin SERF state, and a modulation method is adopted to measure the atom spin polarizability to establish a control target; then a control system model as precise as possible is established on the basis of an SERF model, and a parameter identification method is adopted to estimate unknown parameters of the model; and finally, according to the control target, a special structure design control law of the established model is fully used, i.e. the switching time, frequency, orientation and power of laser and the switching time of a modulation magnetic field are optimized, and the atom spin SERF state is precisely controlled in real time in accordance with a quantum control algorithm. By using the precise control method, the atom spin relaxation time is increased, and the problem of instability of scale factors of atom devices such as an atom spin gyroscope and an atom magnetometer based on the atom spin SERF effect is solved. The precise control method can be used for improving the long-time drift precision and the low-frequency sensitivity based on the SERF atom spin device.

All-optical quasi-phase matching (QPM) uses a train of counterpropagating pulses to enhance high-order harmonic generation (HHG) in a hollow waveguide. A pump pulse enters one end of the waveguide, and causes HHG in the waveguide. The counterpropagation pulses enter the other end of the waveguide and interact with the pump pulses to cause QPM within the waveguide, enhancing the HHG.

The invention discloses an adjustable transmission sub quantum bit system based on an oxygen-free copper rectangular resonant cavity. The system comprises an adjustable transmission sub quantum bit, the oxygen-free copper rectangular resonant cavity assembled with a superconducting coil and a low-temperature magnetic shielding cylinder for shielding the magnetic field of an external environment, wherein the adjustable transmission sub quantum bit is arranged in the center of the inner cavity of the oxygen-free copper rectangular resonant cavity and in the low-temperature magnetic shielding cylinder. The invention further discloses a method for measuring the energy spectrum of an adjustable transmission sub quantum bit based on an oxygen-free copper rectangular resonant cavity. The system and the method realize the transmission sub quantum bit with adjustable jump frequency, and are significant for multi-quantum bit coupling research and quantum control.

Apparatus and method for a single chip quantum control stack. For example, one embodiment of a processor comprises: a decoder comprising quantum instruction decode circuitry to decode quantum instructions to generate decoded quantum instructions; execution circuitry including a plurality of functional units to execute the decoded quantum instructions; a register file shared by the plurality of functional units, the register file to store operands used for execution of the decoded quantum instructions; and a classical-quantum (C-Q) interface to couple the execution circuitry to a quantum processor, the C-Q interface comprising digital-to-analog circuitry to generate analog signals to manipulate a current state of one or more quantum bits (qubits) of the quantum processor in response to execution of the decoded quantum instructions, wherein the decoder, execution circuitry, register file and C-Q interface are integrated on a single integrated circuit (IC) chip.

The invention provides a quantum control method and a quantum control system of the visual navigation of an unmanned aerial vehicle group, wherein the method comprises the following steps that the navigation information of each unmanned aerial vehicle in the unmanned aerial vehicle group is acquired, and a quantum control mechanism is set for each unmanned aerial vehicle according to the navigation information of each unmanned aerial vehicle; the data of each unmanned aerial vehicle in the unmanned aerial vehicle group is acquired and processed so as to obtain the flying data of each unmanned aerial vehicle in the unmanned aerial vehicle group; each unmanned aerial vehicle is controlled by using the corresponding quantum control mechanism based on the flying data of each unmanned aerial vehicle; and quantum complex control mechanisms are acquired by serially or parallelly connecting the quantum control mechanisms of each unmanned aerial vehicle, and the quantum complex control mechanisms collaboratively control the flying of the unmanned aerial vehicle group. According to the method of the embodiment of the invention, the collaboration and navigation precision of the unmanned aerial vehicles are improved by adding a quantum control link into the visual navigation of the unmanned aerial vehicles, so that the safety of the unmanned aerial vehicles is improved.

The embodiment of the invention discloses a quantum control feedback system and method. The method comprises the following steps: reading a microwave signal which is generated by a superconducting quantum chip and is used for representing a quantum bit state through a signal analysis module, analyzing the quantum bit value of each frequency point in the microwave signal, and transmitting each quantum bit value to a state processing module; an interference signal corresponding to each frequency point of the microwave signal is determined through a state processing module, interference removal processing is performed on each quantum bit value based on each interference signal, a quantum bit state of each frequency point is determined based on the quantum bit value obtained after interference removal processing, and the quantum bit state of each frequency point is sent to a waveform generation module; and the waveform generation module outputs a digital waveform corresponding to the quantum bit state so as to carry out feedback control on the quantum chip, so that crosstalk among the quantum bits in the microwave signal is solved, and the accuracy and effectiveness of the quantum bit control process are improved.

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 moreoperations 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 thecontrol sequence based on the characteristics.

The invention relates to a quantum control method of micro energy. The method comprises an independent reaction space step, a micro kinetic-energy strengthening step and a parameter control step. In the independent reaction space step, at least one three-dimensional closing space is provided; in the micro kinetic-energy strengthening step, reaction assemblies in different geometric shapes are arranged on at least one adjacent inner surface of the closing space, and at least two cracks and a plurality of holes are arranged on the reaction assembled; and the parameter control step uses seconds as a control unit and at least contains a first reaction parameter which controls the wave frequency of the independent reaction step when the first reaction parameter takes effect. The method can create an executable quantum control mechanism with reaction significance, change the substance characteristics in a pure physical mode and provide different kinds of energy by controlling a wave function so as to achieve the effects of aiding an environment improvement technology, an agricultural culture and cultivation technology, a traditional medical technology, and the like.

Apparatus and method for specifying quantum operation parallelism. For example, one embodiment of an apparatus comprises: instruction fetch circuitry to fetch a plurality of quantum instructions from a memory or a cache; slice-based instruction processing circuitry to identify quantum circuit slices comprising sets of one or more of the plurality of quantum instructions; and one or more instruction decoders to decode the quantum instructions to generate quantum microoperations; and quantum execution circuitry to execute sets of the quantum microoperations in parallel based on the quantum circuit slices.

The invention discloses a sheared and drawn plate type LED (light-emitting diode) lamp radiator, an aluminum plate added with quantum control material is taken as a baseplate, and a stamping machine tool is adopted for shearing and drawing strip-shaped bulges on the aluminum plate. A plurality of the strip-shaped bulges are manufactured on the baseplate, and two ends of each strip-shaped bulge are not separated from the baseplate. A wire through hole is arranged in the position at which an LED light source is mounted on the baseplate. Each strip-shaped bulge is a circular arc-shaped bulge andcan also be a triangular bulge or a trapezoidal bulge or an M-shaped bulge or a U-shaped bulge. The strip-shaped bulges are arranged according to the shape and the size of a lamp, thereby improving heat radiation area to the maximum extent, being good in heat radiation effect and fully meeting heat radiation of a high-power LED lamp. The volume is small and the occupied space is small. The processing can be performed by the ordinary stamping machine tool, the processing technology is simple, the production efficiency is high, no wastes are generated during shearing and drawing process, the utilization rate of materials is high, and the production cost is low.

The invention discloses a quantum control micro-system structure, a quantum control processor and an instruction execution method, and relates to the technical field of quantum. The quantum control micro-architecture comprises a scheduler, an instruction memory, a plurality of processing units and corresponding private instruction buffers. The scheduler is used for determining k sub-circuits executed in parallel in the quantum circuit, k is an integer greater than 1, acquiring instructions corresponding to the k sub-circuits from the instruction memory, and storing the instructions in the private instruction buffers corresponding to the k processing units; wherein a target processing unit in the k processing units is used for acquiring an instruction corresponding to a target sub-circuit in the k sub-circuits from the private instruction buffer corresponding to the target processing unit and executing the instruction; and wherein the k processing units execute corresponding instructions in parallel. According to the invention, a solution of parallel sub-circuit levels is adopted, and the method has better expansion capability in the face of more complex quantum applications and continuously increasing quantum bits.

The invention discloses a quantum control remote joint implementation method, which belongs to the field of quantum, and is characterized in that three senders share quantum control information needing to be executed, and remote quantum control is completed in a joint assistance manner. The method of the invention adopts an easy-prepared, anti-noise five-particle entangled state as a quantum entangled channel to realize joint control of quantum states; a sender selects to execute corresponding single event measurement according to known remote quantum control information needing to be executedand measurement results of other communication parties, and a receiver executes local unitary operation on other particles according to measurement results of all the senders, so that a target statecan be prepared on the other particles. According to the invention, quantum communication and quantum measurement technologies are utilized to realize quantum state remote joint control. The method has the advantages of high feasibility and high safety.

Systems and methods for obtaining information on a key in the BB84 (Bennett-Brassard 1984) protocol of quantum key distribution are provided. A representative system comprises a quantum cryptographic entangling probe, comprising a single-photon source configured to produce a probe photon, a polarization filter configured to determine an initial probe photon polarization state for a set error rate induced by the quantum cryptographic entangling probe, a quantum controlled-NOT (CNOT) gate configured to provide entanglement of a signal with the probe photon polarization state and produce a gated probe photon so as to obtain information on a key, a Wollaston prism configured to separate the gated probe photon with polarization correlated to a signal measured by a receiver, and two single-photon photodetectors configured to measure the polarization state of the gated probe photon.

Provided is a modulo 2n subtracter design method based on a quantum superposition state. The method uses a basic quantum controlled gate to realize design of a quantum half-subtracter and a repositor,a quantum full subtractor and a repositor, and design of an n-bit quantum modulo 2n subtracter formed by the quantum half-subtracter, the quantum full subtractor, and the repositors. Finally, the designed modulo 2n subtracter is used to realize modulo 2n subtraction based on a quantum superposition state. The method solves a problem of quantum modulo 2n subtraction in the quantum superposition state, and the quantum modulo 2n subtracter based on the quantum superposition state is designed. The method shows high efficiency of quantum information processing in signal processing. 2m n-bit integer modulo 2n subtraction can be realized by just 14n-13 basic operations. Using a classical computer to realize corresponding additive operation needs O(n2m) basic operations. An abstract figure is a quantum diagram of an n-quantum-bit quantum modulo 2n subtracter.

The invention discloses an optical pulse design method for carrying out high fidelity control on ensemble quantum bits, which adopts a reverse engineering method based on Lewis-Riesenfield invariantsand utilizes the perturbation theory and the concept of system error sensitivity to construct a quick and efficient double-color optical pulse with high robustness for frequency detuning and laser intensity fluctuation. The pulse can be applied to a three-level system with non-uniform broadening, and any superposition state of ensemble quantum bits is created with high fidelity. In the pulse action process, quantum control has high robustness for instantaneous change or spatial non-uniform distribution of laser intensity, the robustness can improve the signal-to-noise ratio of a detection signal, and the experiment difficulty is reduced; meanwhile, the time for the quantum bits to be in the excited state is remarkably shortened, the decoherence effect of the quantum bits can be greatly reduced to ensure high-fidelity control is achieved.

Quantum simulation methods are used to encode the quantum response of a molecular system so as to improve the sensitivity for detection of a target material, while rejecting background. The perturbation and response information may be used to discover the system function of a quantum system, or more generally, of a complex system, such as a physiological system. The approach may be applied to medical non-invasive, real-time, continuous molecular detection and quantification techniques through coherent Raman spectroscopy to enable a significantly more attractive course of therapy than existing protocols.

A method for performing quantum control on infinitesimal quanta includes: an independent reaction space provision step, wherein at least one three-dimensional closed space is provided; an infinitesimal-quantum kinetic energy enhancement step, wherein differently shaped reaction elements are provided on at least one inner surface of each closed space, each reaction element having at least two slits and plural pores; and a parameter control step, wherein at least a first reaction parameter is provided, and, upon occurrence thereof, wave control is performed on a corresponding one of the at least one closed space. The method provides an executable quantum control mechanism which is meaningful in terms of reaction and capable of modifying the properties of matter in a purely physical manner, such that a wavefunction is controlled to provide different energies, thereby providing assistance to environmental improvement techniques, agricultural techniques, and traditional medical techniques.

The invention provides a superconducting quantum calculation system and a quantum bit manipulation method. The system comprises a control circuit and a superconducting quantum chip, the superconducting quantum chip comprises at least two communication regions and a first central exchange region, and each communication region comprises a first suspension superconducting bit and at least one first superconducting bit; the first central exchange area comprises first suspended superconducting bits and is used for transmitting quantum operation among the superconducting bits in different communication areas; and the control circuit is used for controlling the coupling strength of the first suspension superconducting bit and the first superconducting bit. Therefore, by controlling the coupling strength between the first suspension superconducting bits and the first superconducting bits, a single communication region or a central exchange region can be isolated, so that sub-spaces are effectively segmented, and two-bit gate control between different communication regions can be transited through the central exchange region; therefore, various quantum control required by general quantum calculation can be realized on a large-scale superconducting quantum calculation chip.

The invention provides a type conversion design method from a quantum image to a quantum real signal, which belongs to the field of quantum signal processing. A quantum controlled gate and a single quantum bit gate are used, according to IEEE754 international standard, quantum circuits for the type conversion from a quantum gray image to a quantum two-dimensional real signal and the type conversion from a quantum color image to a quantum two-dimensional three-channel real signal are built, and necessary foundation is provided for later quantum signal processing (for example, application of quantum wavelets to the quantum image). The efficiency of quantum information processing in signal processing is reflected, and the complexities of the quantum circuits for the type conversion from a quantum gray image to a quantum two-dimensional real signal and the type conversion from a quantum color image to a quantum two-dimensional three-channel real signal are both O(1).

The invention relates to a rolling gate comprehensive control system based on mobile phone remote quantum control. The rolling gate comprehensive control system comprises a gate frame, rolling gate hinges and a remote control device. A horizontal shaft is arranged on the upper portion of the gate frame, rotating wheels are arranged in the middle of the horizontal shaft, and the upper ends of the rolling gate hinges are fixed to the rotating wheels. The control device comprises a motor and a motor rotating shaft, the motor rotating shaft is connected with the rotating wheels to drive the rolling gate hinges to move up and down, and thus a rolling gate is opened and closed. Through terminal devices such as mobile phones, the rolling gate is subjected to remote video monitoring, video on sitecan be seen and audio frequency on site can be heard through remote video monitoring, real-time remote voice talkback, video recording, sound recording, mobile detection and site snipping can be achieved, the rolling gate can further be controlled in timing, delaying and remote modes, and the different rolling gates can be subjected to visible cloud quantum variable frequency speed regulation through one mobile phone and a plurality of quantum control units.

All-optical quasi-phase matching (QPM) uses a train of counterpropagating pulses to enhance high-order harmonic generation (HHG) in a hollow waveguide. A pump pulse enters one end of the waveguide, and causes HHG in the waveguide. The counterpropagation pulses enter the other end of the waveguide and interact with the pump pulses to cause QPM within the waveguide, enhancing the HHG.

The embodiment of the invention discloses an ion trap device and a control method thereof, which are used for quantum calculation or quantum control and the like, and can be used for rapidly supplementing ions, reducing the ion supplementing time consumption and reducing the influence of ion or quantum bit loss on quantum control and measurement operation. The ion trap device comprises an ion generation and capture region, an ion storage region and an ion control and measurement region, wherein the ion storage region is located between the ion generation and capture region and the ion controland measurement region; the ion generation and capture region is used for generating ions and capturing the generated ions; the ion storage region is used for storing the ions captured in the ion generation and capture region and supplementing new ions to the ion control and measurement region; and the ion control and measurement region is used for carrying out quantum control and measurement operation on the ions trapped in the ion control and measurement region.

A method for robust state manipulation in quantum information processing comprises evanescently coupling a first waveguide to a second waveguide, the first and second waveguide having different geometries respectively; and providing waveguide geometries such that their coupling is detuned, the detuning being a function of the geometries, the detuned coupling thereby providing reliable population transfer between the first and second waveguides that is robust to fabrication and other errors. The method may be used to provide a quantum optical coupler.

The invention relates to a precise control method of an atom spin SERF (Self-Exchange Relaxation-Free) state for stabilizing an atom spin device, which comprises the following steps that firstly, a precise equation is established for the atom spin SERF state, and a modulation method is adopted to measure the atom spin polarizability to establish a control target; then a control system model as precise as possible is established on the basis of an SERF model, and a parameter identification method is adopted to estimate unknown parameters of the model; and finally, according to the control target, a special structure design control law of the established model is fully used, i.e. the switching time, frequency, orientation and power of laser and the switching time of a modulation magnetic field are optimized, and the atom spin SERF state is precisely controlled in real time in accordance with a quantum control algorithm. By using the precise control method, the atom spin relaxation time is increased, and the problem of instability of scale factors of atom devices such as an atom spin gyroscope and an atom magnetometer based on the atom spin SERF effect is solved. The precise control method can be used for improving the long-time drift precision and the low-frequency sensitivity based on the SERF atom spin device.

The invention discloses a device and a method for forming spin-dependent optical lattices. The device is characterized by comprising atoms, a vacuum cavity, a lattice laser module, a phase adjustablecontrol module and a power adjustable control module, the method comprises the following steps: 1) arranging cold atoms of which the temperature can reach a micro-Kelvin order after laser cooling in avacuum cavity; 2) dividing the laser capable of forming the wavelength of the spin-dependent optical lattice into four beams, the first beam being linearly polarized laser, and inputting the linearlypolarized laser into a vacuum cavity; wherein the second beam and the third beam are respectively horizontal polarized light and vertical polarized light which are combined and then input into the vacuum cavity; the fourth beam is reference laser; and 3) collecting the light beams of the second beam and the third beam, adjusting the frequency and the phase, and adjusting the optical power at thesame time. The spin-dependent optical crystal lattice can be controlled, and then quantum control on the internal and external states of atoms is completed in the spin-dependent optical crystal lattice.

The application discloses a quantum control micro-architecture, a quantum control processor and an instruction execution method, and relates to the field of quantum technology. The quantum control micro-architecture includes: a scheduler, an instruction memory, a plurality of processing units and corresponding private instruction buffers. The scheduler is used to determine the k sub-circuits executed in parallel in the quantum circuit, where k is an integer greater than 1, obtain the instructions corresponding to the k sub-circuits from the instruction memory, and store them in the private instruction buffers corresponding to the k processing units respectively. The target processing unit in the k processing units is used to obtain instructions corresponding to the target sub-circuits in the k sub-circuits from its corresponding private instruction buffer for execution; wherein, the k processing units execute their corresponding instructions in parallel. The present application adopts a sub-circuit level parallel solution, which has better scalability in the face of more complex quantum applications and increasing qubits.

A Modulo 2 Based on Quantum Superposition n Subtractor design method, the method uses basic quantum controlled gate to realize the design method of quantum half subtractor and reset, quantum total subtractor and reset, and constitute n by quantum half subtractor, quantum total subtractor and reset Bit Quantum Modulus 2 n The design method of the subtractor; finally use the designed modulo 2 n Subtractor realizes modulo 2 based on quantum superposition state n Subtraction operation. The invention solves the quantum mode 2 of the quantum superposition state n Subtraction problem, designed a quantum modulo 2 based on quantum superposition state n Subtractor. The invention embodies the high efficiency of quantum information processing in signal processing: only 14n‑13 basic operations can be used to achieve 2 m n-bit integers modulo 2 n Subtraction operations, while implementing the corresponding addition operations on a classical computer requires O(n2 m ) basic operation. Quantum modulus 2 of n qubits of the present invention n Quantum circuit diagram of a subtractor.

The invention provides a type conversion design method from a quantum image to a quantum real signal, and belongs to the field of quantum signal processing. According to the invention, a quantum controlled gate and a single-quantum-bit gate are utilized. According to the IEEE 754 international standard, a quantum circuit for converting the type of a quantum grayscale image into a quantum two-dimensional real signal and converting the type of a quantum color image into a quantum two-dimensional and three-channel real signal is constructed. As a result, a necessary foundation is provided for thesubsequent processing of a quantum signal (for example, the quantum wavelet is applied to the quantum image). According to the invention, the efficient performance of the quantum information processing in signal processing is embodied. The quantum line complexity of the type conversion of the quantum grayscale image to the quantum two-dimensional real signal and the type conversion of the quantumcolor image to the quantum two-dimensional three-channel real signal is 0 (1).