280 results about "Quantum information processing" patented technology

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, to various aspects of optical addressing systems configured to individually address multiple ions of a chain of ions trapped within an ion trap. In some aspects, the trapped ions have non-equidistant spacing.

A control system for a network of quantum systems operates the network to perform quantum informatics processing. The control system includes an entanglement scheduler configured to identify operations for which entanglement of two or more of the quantum systems is desired, identify plural potential entanglement attempts for generating the entanglement; and schedule at least some of the potential entanglement attempts to be performed to generate the entanglement for at least one of the operations. The entanglement scheduler may use direct entanglement, entanglement swapping and / or quantum teleportation approaches to generate the entanglement. The entanglement scheduler may schedule probabilistic entanglement attempts based at least in part on the probability of success of the entanglement attempts. The entanglement scheduler may generate entanglement to support plural branches of a quantum informatics process and / or to respond to events occurring while the quantum informatics process is executing.

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, calibrations during tandem execution of quantum circuits.

The invention provides a photovoltaic ultra-short-term power prediction method based on quantum. The method comprises the steps of performing quantization processing on historical actual power, historical weather information, historical sky imaging information and weather forecast information of a photovoltaic power station to be predicted to generate a photovoltaic power station power wave function, a historical weather information wave function, a historical sky imaging wave function and a weather forecast wave function; constructing a time correlation function according to the historical weather information wave function, the historical sky imaging wave function and the weather forecast wave function; constructing an interaction function between information at different moments; and constructing a power prediction model based on the weather forecast wave function, the time correlation function, the interaction function and the photovoltaic power station power wave function so as to carry out photovoltaic ultra-short-term power prediction. Therefore, the influence of various factors on the photovoltaic power can be accurately captured based on the quantum information processing technology, so that the accuracy and reliability of photovoltaic power prediction are effectively improved.

The invention provides a Bayesian-based parameter optimization method and system for quantum key distribution, relates to the technical field of quantum information processing, and aims to solve the problems that in the prior art, the calculation amount is large, the efficiency is low, and real-time parameter optimization of a high-speed quantum key distribution system and the optimal configuration requirement of large quantum communication network resources are difficult to realize. The method comprises the following steps: acquiring system parameters, a sending probability in an MDI-QKD protocol, and intensities of a signal state and a decoy state; the obtained data is preprocessed; according to the preprocessed data, a parameter optimal model based on Bayesian optimization is constructed, training and testing are carried out, and a trained model is obtained; and inputting to-be-predicted system parameters and the sending probability, signal state and decoy state intensity data in the MDI-QKD protocol into the trained model, and outputting optimal parameters. According to the method, the to-be-optimized system parameters can be accurately predicted, the system parameter optimization efficiency is improved, the time cost is reduced, and the key generation rate is greatly improved.

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, to a double individual-addressing multi-beam Raman system for use in QIP systems. A technique is described in which a first multi-channel modulator (MCM), a first telecentric zoom lens, and a first interleaver that form a first optical path of the Raman system that receives a first array of beams and adjusts the first array of beams to individually address atomic-based qubits in a chain from a first direction. Moreover, a second MCM, a second telecentric zoom lens, and a second interleaver form a second optical path of the Raman system that receives a second array of beams and adjusts the second arrays of beams to individually address the atomic-based qubits in the chain from a second direction different from the first direction.

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems including an ion trap and a multiple-zone addressing system, and more particularly, to a large field-of-view Raman system having a micro-or metalens array. In some aspects, the ion trap is configured to confine at least a first trapped ion chain and a second trapped ion chain. In some aspects, the multiple zone addressing system includes a first optical addresser, a second optical addresser, and a combining region.

The invention discloses a configuration acquisition method and system for realizing a maximum violation five-setting CHSH measurement device, and relates to the technical field of quantum information processing, and the method comprises the steps: S1, obtaining the probability amplitude of the pure state of a pair of two-dimensional non-maximum entangled particle A and particle B, and calculating the concurrency; s2, constructing an incidence matrix based on the concurrency, and mapping the measurement vector of the particle B from the Bloch spherical surface to the ellipsoid surface by using the incidence matrix; s3, taking five points on the same plane on the ellipsoid as vertexes of a five-pointed star, wherein a perimeter formula of the five-pointed star is equivalent to a correlation function maximum value formula; s4, traversing vertex positions of the five-pointed star to obtain a maximum perimeter value; s5, obtaining the measurement vector of the particle B and the measurement vector of the particle A to obtain the optimal measurement configuration; and S6, configuring a quantum measurement device to measure the particles A and B. According to the method, the problem of setting the maximum value of the CHSH correlation function is converted into the problem of solving the maximum value of the perimeter of the ellipsoid inscribed five-pointed star, and the optimal measurement scheme is obtained through simple numerical fitting.

Techniques for performing quantum information processing using an asymmetric error channel are provided. According to some aspects, a quantum information processing includes a data qubit and an ancilla qubit, the ancilla qubit having an asymmetric error channel. The data qubit is coupled to the ancilla qubit. The ancilla qubit may be driven with a stabilizing microwave field to create the asymmetric error channel.

A method and system is provided for operating a quantum information processing (QIP) system, including a dual-space, single-species architecture for trapped-ion quantum information processing. An exemplary method of preparing the ions include i) applying a first optical beam to the plurality of ions to shelve at least a portion of the plurality of ions from a first state to a second state, ii) applying a second optical beam to the plurality of ions to deshelve the at least a portion of the plurality of ions from the second state to a third state, iii) applying a third optical beam to optically pump the at least a portion of the plurality of ions from the third state and to a fourth state, and iv) iteratively repeat i) to iii) to transition a remaining portion of the plurality of ions to the fourth state.

Aspects of the present disclosure describe techniques that involve an active stabilization of coherent controllers using nearby qubits. In an aspect, a quantum information processing (QIP) system for stabilizing phase damping in qubits is described that provides a first and a second qubit ion, measuring magnetic field fluctuations using the second qubit ion, and generates one or more magnetic fields based on the measured magnetic field fluctuations, the one or more magnetic fields being applied near the first qubit ion to cancel the magnetic field fluctuations to stabilize the phase damping of the first qubit ion. Another such QIP system performs provides a first and a second qubit ion, locks a local oscillator to a frequency reference associated with the second qubit ion, and tracks, using the local oscillator, a frequency of the first qubit ion based on the frequency reference. Methods associated with these QIP systems are also described.

The invention discloses an awareness perception quantum gravitational nerve acceleration unified computing platform and method based on formalized verification, and belongs to the field of high-performance computing, medical AI and quantum information processing. A quantum gravitational coupling neural processing unit (QGCNPU); a consciousness information integral calculation core (phi ICC); formalizing a receipt chain verifier (FRCV); and the mirror reflection symmetry correction module (MRSCM) is used for eliminating the continuous projection mistake and the discrete Boolean mistake through topological equivalence verification of a local observer and a global GodCam visual angle. The system adopts an FPGA + ASIC + quantum processor three-layer heterogeneous architecture, and supports real-time pathological modeling (precision gt; gt) of neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease and ALS; 99.7%), drug target discovery (acceleration by 50 times) and consciousness state monitoring (time resolution lt; and meanwhile, the mathematical proving performance and the clinical auditing performance of the calculation process are ensured, and the requirements of the global 152 billion dollar neural science and technology market and the 89 billion dollar quantum calculation industry are met.

Aspects of the present disclosure relate generally to systems and methods for detecting change in images using a quantum information processing (QIP) system. The method includes implementing a quantum circuit in the QIP system, the quantum circuit comprising at least an ancilla qubit denoted as |a> and qubits denoted as image qubit conditions on a |0> state and a |1> state of the ancilla qubit |a>. The method also includes loading a reference image and a test image onto image qubits controlled on the |0> state and the |1> state of the ancilla qubit |a> in the quantum circuit. The method further includes determining a state of the image qubits after measuring |1> on the ancilla qubit for a predetermined number of times, wherein the reference image is detected to be different from the test image when the state of the ancilla qubit measures |1>.

A quantum computer executes quantum measurement plural times based on information related to a quantum circuit structure so as to acquire measurement results of the quantum measurement, and transmits the measurement results to a classical computer. The classical computer receives the measurement results and selects R individual measurement values from the measurement results. The classical computer generates an effective Hamiltonian based on a Hamiltonian H of a system to be computed and on the selected R individual measurement values, and computes a ground state of the Hamiltonian H and a ground state energy of the Hamiltonian H by diagonalizing a matrix representing the effective Hamiltonian.

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.

This classic computer transmits a quantum circuit for preparing quantum states to a quantum computer. With respect to each of a first quantum bit group including n quantum bits and a second quantum bit group including n quantum bits different from the quantum bits in the first quantum bit group, the quantum computer sets n pairs of the quantum bits in the first quantum bit group and the quantum bits in the second quantum bit group, acquires a result of Bell measurement by executing the Bell measurement for a tensor product of the quantum states by using each of the n pairs and the quantum circuit, and transmits the result of Bell measurement to the classic computer. The classic computer calculates an expectation value of each of a plurality of Pauli products in the quantum states on the basis of the result of the Bell measurement, and calculates an expectation value of each of a plurality of operators on the basis of a combination of arbitrary Pauli products among the plurality of Pauli products.

Aspects of the present disclosure describe techniques that involve an active stabilization of coherent controllers using nearby qubits. In an aspect, a quantum information processing (QIP) system for stabilizing phase damping in qubits is described that provides a first and a second qubit ion, measuring magnetic field fluctuations using the second qubit ion, and generates one or more magnetic fields based on the measured magnetic field fluctuations, the one or more magnetic fields being applied near the first qubit ion to cancel the magnetic field fluctuations to stabilize the phase damping of the first qubit ion. Another such QIP system performs provides a first and a second qubit ion, locks a local oscillator to a frequency reference associated with the second qubit ion, and tracks, using the local oscillator, a frequency of the first qubit ion based on the frequency reference. Methods associated with these QIP systems are also described.

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, for background-free qubit measurement. In some aspects, a method includes controlling a photon source oriented to direct photons towards ion(s) in an ion trap to produce photons having a first wavelength for a first time period; stopping the photon source from producing photons having the first wavelength; activating a photon detector configured to detect photons having the first wavelength; controlling the photon source to produce photons having a second wavelength different than the first wavelength for a second time period; detecting photons having the first wavelength during the second time period; and determining, based on detection of photons having the first wavelength during the second time period, that at least one of the one or more ions is in a |1> state.

Quantum Information Processing (QIP) with the availability of Noisy Intermediate-Scale Quantum (NISQ) device(s) are available to work on quantum algorithms. Different problems, which are hard to solve by classical computation, but can be sped up (significantly in some cases) are also being populated. However, current approaches solve only two cluster max-cut problems. Mining the two cluster Max-Cut problem within the framework of quantum Ising model, embodiments of the present disclosure solve Quadratic Unconstrained D-ary Optimization (QUDO) problems by quantum computing with the identification of an appropriate Hamiltonian. More specifically, the problem is mapped to an Ising model to obtain a d-ray Quantum Ising Hamiltonian. The d-ray Quantum Ising Hamiltonian is then executed on one or more qudit processors, to obtain one or more resultant quantum states which are measured in a qudit computational basis to obtain at least one solution.

This classical computer transmits, to a quantum computer, a quantum circuit that is for performing quantum phase estimation, and that is generated on the basis of a quantum state |ψ> corresponding to the eigenstate of a target system, and information on a coefficient matrix when the equation of motion of the target system is expressed by a matrix format. The quantum computer acquires a measurement result of the eigenvalue of the coefficient matrix by executing the quantum circuit, and transmits the measurement result of the eigenvalue to the classical computer. The classical computer calculates the eigenfrequency of the target system on the basis of the measurement result of the eigenvalue.

To provide a quantum computing technology that overcomes problems of quantum bit storage, interlayer entanglement processing, and quantum wire management.SOLUTION: A quantum information processing device (1) includes: an antenna array section (10) that converts input information into electromagnetic waves, electric frequencies, or magnetic frequencies; and a chemical processor (23) to which the electromagnetic, electric, or magnetic frequencies are supplied. The chemical processor (23) creates helical nanowires and their assemblies whose structures are determined according to one or more variables that define and control the input information.SELECTED DRAWING: Figure 1

The invention provides a quantum device and a preparation method thereof, and the quantum device comprises a superconducting ferromagnet structure which comprises a superconducting layer and a ferromagnet layer disposed on the superconducting layer; and the detector comprises a coplanar waveguide resonator, the coplanar waveguide resonator is in alternating current coupling with the superconducting ferromagnet structure, and the coplanar waveguide resonator is configured to detect the superconducting ferromagnet structure. According to the invention, the circuit quantum electrodynamics is introduced into the research of the superconducting ferromagnet structure, the coupling strength between the superconducting ferromagnet structure and the coplanar waveguide resonator is improved, and the accurate detection of the superconducting ferromagnet structure in the microwave range is realized; the efficiency and speed of quantum information processing are improved by realizing high-efficiency conversion and transmission between the magnetic vibrator and the photons.

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, to the use of qubit feedback for noise cancellation in quantum elements and / or quantum computations in QIP systems.

Aspects of the present disclosure relate generally to systems and methods for detecting change in images using a quantum information processing (QIP) system. The method includes implementing a quantum circuit in the QIP system, the quantum circuit comprising at least an ancilla qubit denoted as |a> and qubits denoted as image qubit conditions on a |0> state and a |1> state of the ancilla qubit |a>. The method also includes loading a reference image and a test image onto image qubits controlled on the |0> state and the |1> state of the ancilla qubit |a> in the quantum circuit. The method further includes determining a state of the image qubits after measuring |1> on the ancilla qubit for a predetermined number of times, wherein the reference image is detected to be different from the test image when the state of the ancilla qubit measures |1>.

A photonic integrated circuit comprising one or more waveguides comprising a second order non-linearity configured to operate on optical pulses each having a pulse length shorter than 1000 optical cycles, as measured at their full width at half maximum. The circuit is configured to generate one or more quantum states carried by one or more of the optical pulses, manipulate one or more of the quantum states, and / or measure one or more of the quantum states.

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, to techniques for optimizing the quantum resources that are used for the calibration of a fully connected quantum processing unit or QPU.

The invention provides a quantum information processing system, and the system comprises an optical modulator which is suitable for modulating an initial laser beam generated by a laser, and generating a one-dimensional light spot array; the first light spot mapping assembly is suitable for mapping the one-dimensional light spot array into a first light spot array; the first light spot array has a distribution form matched with the quantum bit array, and the quantum bit array is suitable for being excited by the first light spot array to generate fluorescence signals distributed in an array form, so that the fluorescence signals form a first point light source array; the second light spot mapping assembly is suitable for obtaining the spatial position of each quantum bit in the quantum bit array based on the first point light source array, and mapping the first point light source array into a one-dimensional point light source array; the detection array is adapted to convert a plurality of optical signals in the one-dimensional point light source array into a plurality of first electrical signals.

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, to the use of deflectors in trapped ion QIP systems for individually addressing long ion chains. Methods are described for using acousto-optic deflectors (AODs) in optical Raman transitions to implement single-qubit gates and two-qubit gates. A QIP system is also described that is configured to use AODs in optical Raman transitions to implement single-qubit gates and two-qubit gates.

Aspects of the present disclosure relate generally to systems, devices, methods, and computer-program products for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, for circuit embedding in a quantum computer having reconfigurable qubit registers.

The invention discloses a quantum information processing method and system based on quantum walk, and the method comprises the steps: firstly introducing phase rotation into a coin operator to obtain standard quantum walk, then connecting the standard quantum walk of two different stages to obtain alternate quantum walk, and then constructing step-by-step alternate quantum walk based on the alternate quantum walk, and finally, quantum walking evolution is carried out by using step-by-step alternating quantum walking to obtain an entanglement relationship between the quantized coin and the particle position, and statistics is carried out on a probability distribution standard deviation-time graph of step-by-step alternating quantum walking, the influence of the phase on the evolution speed in different region ranges and alternating step-by-step quantum walking characteristics of different region boundaries. Quantum entanglement and evolution are completed by researching the evolution speed and the boundary effect, any phase rotation is introduced in coin generalization quantum walking, the efficiency and the application range of quantum information processing are remarkably improved, and higher search speed and higher accuracy can be provided by applying the method to a quantum search algorithm.