12 results about "Ising model" patented technology

A computer-readable recording medium stores therein an information processing program for causing a computer to execute a process, the process includes: obtaining a decomposition number of a Trotter decomposition approximating a quantum unitary corresponding to an Ising model; and setting a quantum circuit expressing a formula of the Trotter decomposition by one or more first partial circuits and a second partial circuit, the one or more first partial circuits being of a first count one less than the obtained decomposition number and each including an Rz gate that represents a rotation action about a Z-axis on a qubit, the second partial circuit being free of the Rz gate and coupled to a rear of the one or more first partial circuits.

A non-transitory computer-readable storage medium storing a solution search program that causes at least one computer to execute a process, the process includes reducing, when searching for a ground state of the Ising model that represents a problem by obtaining a state change of the Ising model, a strength of a magnetic field applied to the Ising model according to a first annealing schedule from an initial state of the Ising model; and reducing, after a quantum phase transition occurs in the Ising model, the strength of the magnetic field according to a second annealing schedule.

An original problem, which may be represented as a string, for execution in a quantum computing system is classically compressed using classical computing systems. Unique variable names and unique coefficients stored in tables constructed from the original problem are associated with unique identifiers. The problem is then translated to a translated form, such as a translated string, using the tables. The translated string may also be generated after quantizing values in the at least one of the tables. The translated string, whether or not quantized, may be entropy encoded. The final result is a compressed version or string of the original string that can be transmitted and stored in a compressed form. The compressed problem may also be decompressed and submitted for execution in a quantum computing system.

This invention relates to a method for generating conditional data and a hybrid computer system. In this hybrid computer system, a digital computer transforms the sampling problem of the variables to be sampled in a conditional data generation model of an energy network type, which can be mapped to a quantum computer, into a problem of solving the Ising model. The quantum computer then solves the Ising model to achieve rapid sampling. This invention solves the technical problem of low sampling efficiency in existing deep learning-based conditional data generation models, thereby improving the sampling efficiency of conditional data generation models.

The present application relates to an apparatus and a method for optimization. An optimization apparatus solves the ground state of an Ising model by running a simulation of state changes of the Ising model that occur when a magnetic field applied to the Ising model representing a target problem is decreased. In doing so, the optimization apparatus adds values corresponding to noise to some coefficients used in the simulation. Then, the optimization apparatus performs a first process of real-time propagation that decreases the strength of the magnetic field with the time progression in the simulation and a second process that decreases the energy of the Ising model based on an imaginary-time propagation method.

An information processing device for assisting creation of an Ising model, includes an input reception unit for receiving an input of an objective function that formulates characteristics of a composite material according to a formulation and a condition of constraint on the formulation, and a data creation unit for creating the Ising model for causing an annealing type optimization machine to solve an optimal solution of the formulation that satisfies a constraint condition expression and optimizes the characteristics, wherein the condition of constraint on the formulation includes a condition related to a mix number of substances included in a substance group and to be mixed in the composite material, for each substance group composing the composite material, and a condition related to an amount of substance to be mixed in the composite material, for each substance included in the substance group, and the constraint condition expression is formulated so as not to be calculated as the optimal solution of the formulation in a case where at least one of the condition regarding the mix number and the condition related to the amount of substance is not satisfied.

The application discloses an optical Ising machine based on Cholesky decomposition. The application encodes the interaction matrix of the Ising model into an optical modulation system after Cholesky decomposition, inputs an optical signal carrying the spin group state information of the Ising model, and outputs an optical intensity signal encoded with the Hamiltonian information of the Ising model, so that the high-speed calculation of an arbitrary Ising model Hamiltonian is realized. The application has the advantages of large scale, wide application range, high speed and the like.

This calculation model is a calculation model that is appliable to an Ising model or QUBO, in which a plurality of choices in a combinatorial optimization problem are assigned to any of possible values of one or more binary variables, and one of the binary variables is fixed on the basis of constraints imposed on the combinatorial optimization problem.

The application discloses an optical Ising model calculation method and system based on wavelength division multiplexing. The application can load any Ising model, greatly increases the adaptability of the system, has the advantages of wide application range, fast information transmission, simple structure, low cost, fast calculation and the like. The application takes a coherent multi-wavelength light source as a signal input, splits the light field by using a light splitting device, then encodes the spin, interaction and magnetic field parameters on the light signals of different wavelengths by using an optical modulator, performs optical Fourier transform by using a lens system, makes the light fields of the same wavelength interfere, and combines the light fields of different wavelengths, finally measures the total light intensity after combination by using a detector, so that the Hamiltonian of the Ising model of optical calculation of any interaction is realized. The method provided by the application has important application prospects in solving optimization problems and Ising model phase transition research and the like, and is convenient to integrate in optical chips and the like specific applications.