WO2023095449A1 - 情報処理装置、情報処理方法、及び情報処理プログラム - Google Patents
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Definitions
- the present disclosure relates to an information processing device, an information processing method, and an information processing program.
- Japanese Patent Application Laid-Open No. 2021-117977 discloses a technique in which not only a quantum computer but also a classical computer performs some of the arithmetic processing for finding the solution of a combinatorial optimization problem.
- Japanese Patent Application Laid-Open No. 2020-184759 discloses a technique for grouping multiple antennas provided in multiple base stations by quantum annealing.
- the Ising machine is known as a quantum computer that specializes in solving optimization problems.
- Ising machines include quantum annealing machines that use the properties of quantum mechanics, coherent Ising machines that use the properties of light, and digital annealers that are composed of digital circuits.
- the optimization problem is modeled. Examples of models that can be solved by the Ising machine include the QUBO (Quadratic Unconstrained Binary Optimization) model, which models the optimization problem with a quadratic form of binary variables of 0 or 1, and the optimization problem of -1 or 1.
- An Ising model modeled by a quadratic form of binary variables, etc. can be mentioned. Note that the QUBO model and the Ising model can be mutually converted.
- the present disclosure has been made in view of the above circumstances, and provides an information processing device, an information processing method, and an information processing program that can reduce the number of qubits when causing an Ising machine to compute an optimization problem. intended to
- An information processing apparatus includes at least one processor, and is a process of solving an optimization problem by obtaining a value of an unknown variable using a first objective function, wherein the value of the unknown variable is An information processing device that causes an Ising machine to execute processing correlated with the number of qubits when solving an optimization problem with the Ising machine, wherein the processor uses a second objective function different from the first objective function Deriving the smallest unknown variable value within the range of obtaining a feasible solution of the optimization problem, and solving the optimization problem defined by the mathematical model containing the derived unknown variable value and the first objective function. It controls the Ising machine to execute the processing to be performed.
- the second objective function may be an objective function that can relax the constraint conditions compared to the first objective function. Thereby, the amount of calculation can be reduced.
- an unknown variable is stored in a qubit group including a plurality of qubits, and the value of the unknown variable is represented by a position where the qubit is 0 or 1 in the qubit group.
- the information processing apparatus of the present disclosure may further include an Ising machine having at least one processor, and the processor of the Ising machine may execute processing for solving an optimization problem defined by a mathematical model. This allows the optimization problem to be efficiently solved.
- the information processing method of the present disclosure includes at least one processor, and is a process of solving an optimization problem by obtaining a value of an unknown variable using a first objective function, the unknown variable
- an information processing program of the present disclosure includes at least one processor, and is a process of solving an optimization problem by obtaining a value of an unknown variable using a first objective function
- An information processing program for causing a processor of an information processing device to execute a process whose value correlates with the number of qubits in solving an optimization problem by the Ising machine, wherein the first objective function is A mathematical model that derives a minimum unknown variable value within a range in which a feasible solution of an optimization problem can be obtained using a different second objective function, and includes the derived unknown variable value and the first objective function It controls the Ising machine to execute the process of solving the optimization problem defined by .
- FIG. 2 is a block diagram showing an example of the hardware configuration of an Ising machine
- FIG. FIG. 3 is a schematic diagram for explaining an optimization problem according to the first embodiment
- FIG. FIG. 4 is a schematic diagram showing an example of a solution to an optimization problem according to the first embodiment
- FIG. FIG. 4 is a diagram showing an example of quantum bits representing the first round of one truck
- FIG. 10 is a diagram showing an example of a quantum bit representing a solution for the first round of one truck
- FIG. 4 is a diagram showing an example of quantum bits representing multiple rounds of one track
- FIG. 4 is a diagram showing an example of quantum bits representing multiple turns of multiple trucks; 1 is a block diagram showing an example of a functional configuration of an information processing device; FIG. FIG. 4 is a diagram for explaining quantum bits to be reduced according to the first embodiment; FIG. 2 is a block diagram showing an example of a functional configuration of an Ising machine; FIG. 6 is a flowchart showing an example of model generation processing; It is a flowchart which shows an example of a solution-finding process.
- FIG. 10 is a schematic diagram for explaining an optimization problem according to the second embodiment;
- FIG. FIG. 11 is a diagram for explaining an example of a method of representing quantum bits according to the second embodiment; FIG.
- FIG. 11 is a diagram for explaining an example of a method of representing quantum bits according to the second embodiment;
- FIG. 10 is a diagram for explaining another example of a quantum bit expression method according to the second embodiment;
- FIG. 10 is a diagram for explaining another example of a quantum bit expression method according to the second embodiment;
- FIG. 11 is a diagram for explaining quantum bits to be reduced according to the second embodiment;
- FIG. Examples of the information processing device 10 include a server computer and the like.
- the information processing apparatus 10 includes a CPU (Central Processing Unit) 20, a memory 21 as a temporary storage area, and a non-volatile storage section 22.
- FIG. The information processing apparatus 10 also includes a display 23 such as a liquid crystal display, an input device 24 such as a keyboard and a mouse, a network I/F (InterFace) 25 connected to a network, and an Ising machine 26 .
- the CPU 20 , memory 21 , storage unit 22 , display 23 , input device 24 , network I/F 25 and Ising machine 26 are connected to bus 27 .
- the information processing apparatus 10 may include multiple Ising machines 26 .
- the storage unit 22 is implemented by a HDD (Hard Disk Drive), SSD (Solid State Drive), flash memory, or the like.
- An information processing program 30 is stored in the storage unit 22 as a storage medium.
- the CPU 20 reads out the information processing program 30 from the storage unit 22 , expands it in the memory 21 , and executes the expanded information processing program 30 .
- the storage unit 22 also stores problem data 32 for modeling an optimization problem to be solved by the information processing apparatus 10 . Details of the optimization problem represented by the problem data 32 will be described later.
- the Ising machine 26 is dedicated hardware for handling the QUBO model, and is installed in an expansion card slot of the information processing device 10, for example.
- the Ising machine 26 is implemented, for example, by a digital circuit such as an FPGA (Field Programmable Gate Array).
- FPGA Field Programmable Gate Array
- the Ising machine 26 performs processing to solve the optimization problem defined by the QUBO model, and outputs the processing result to the CPU 20 .
- the Ising machine 26 may be a computer provided outside the information processing apparatus 10 such as a cloud server connected via a network.
- the Ising machine 26 includes a processor 40, an interaction clock generator 42, a random number generator 44, and a plurality of Ising chips 46.
- processor 40 performs the process of solving the optimization problem by controlling interaction clock generator 42 , random number generator 44 , and each Ising chip 46 .
- the interaction clock generator 42 generates a clock for interaction between bits when the Ising chip 46 handles the QUBO model.
- the random number generator 44 generates a random number, which is a random bit string, to prevent the solution search process executed by the Ising chip 46 from falling into a local optimum solution.
- the Ising chip 46 includes memory cells that store bits, interaction coefficients, external magnetic field coefficients, and the like.
- FIG. 3 shows an example in which there are three trucks and nine stores.
- the number written inside the truck in FIG. 3 represents the maximum number of products that can be loaded on the truck (hereinafter referred to as “maximum loading capacity”).
- the numbers written inside the stores in FIG. 3 represent the number of demand for the products in the stores.
- the number of stores, the number of products demanded at each store, the number of trucks, the maximum loading capacity of each truck, the distance traveled by trucks between the warehouse and each store, and the distance traveled by trucks between stores is known.
- a delivery route that minimizes the total travel distance from a truck leaving a warehouse to delivering products that meet the demand of each store and finally returning to the warehouse. will be described as an example. It is assumed that one truck can go around multiple times. A lap here means that the truck leaves the warehouse, delivers goods to one or more stores, and returns to the warehouse.
- An example solution to the routing problem of the example of FIG. 3 is shown in FIG. The solid line arrow in FIG.
- S the number of stores to which products are delivered
- T the number of trucks
- N the maximum number of times each truck makes a round
- I the maximum number of stores that each truck can visit in one round.
- S , S+1 ⁇ , t ⁇ T s ⁇ 1, 2, . . . , T ⁇
- n ⁇ N s ⁇ 1, 2, . , N ⁇
- i ⁇ I s ⁇ 1, 2, . . . , I ⁇ .
- the suffix "s" indicates a set.
- S s S+1 is added to the last element of the set to represent the truck's final return to the warehouse.
- N is assumed to be a number greater than one. This is because the maximum loading capacity of the truck is set in the above route determination problem, and even if all trucks share the delivery, there is a possibility that the products cannot be delivered to all the stores in one round.
- the first round of the truck all stores are candidates for visiting destinations, and the number of stores to be visited in the first round is unknown. I will have the bits ready.
- the quantum bits are arranged two-dimensionally, the vertical direction represents the variable i, and the horizontal direction represents the variable s.
- FIG. 6 The result of solving the route determination problem is expressed as shown in FIG. 6 as an example.
- locations where the quantum bit value is “1” represent visiting the store, and locations where the quantum bit value is “0” represent not visiting.
- the description of “0” is omitted for the portions where the value of the quantum bit is “0”, and the columns are left blank. This also applies to FIGS. 7 and 8, which will be described later.
- the truck visits store 2 first, second store 3, and third return to the warehouse in the first round.
- the qubits shown in FIGS. 5 and 6 are for one round, as shown in FIG. 7 as an example, by preparing N rounds of these qubits, the qubits for one track can be defined. That is, the number of qubits required to express one truck is (S+1) ⁇ N ⁇ I. Furthermore, as shown in FIG. 8 as an example, by preparing the same number of quantum bits for one truck as the number of trucks, the solution of the route determination problem shown in FIG. 3 can be expressed. That is, the number of bits required in the example shown in FIG. 8 is T*(S+1)*N*I.
- Equation (1) expresses the condition that one truck visits each store only once.
- Equation (2) expresses the condition that the number of stores that one truck can visit at the same time is one.
- Equation (3) expresses the condition that each truck visits stores in order, such as the first, second, and so on. Specifically, as shown in FIG. 6, the expression (3) starts with the first store, and visits the second, third, and so on until it returns to the warehouse. It represents the condition that there is no row with only a qubit value of "0" between the first row to be visited, that is, the row representing the return to the warehouse.
- Formula (4) expresses the condition that the number of products delivered by each truck is equal to or less than the maximum loading capacity of each truck. Equation (5) expresses the condition that each truck returns to the warehouse each round. Equation (6) expresses the condition that each truck does not visit the store after returning to the warehouse in each round.
- the objective function for minimizing the total travel distance of the truck is given by the following equation (7).
- This objective function is an objective function used for solving the above-described route determination problem, and is hereinafter referred to as a "first objective function".
- the QUBO model defined by equations (1) to (7) can be solved by the Ising machine 26.
- S and T are uniquely determined from the problem setting, but N and I are arbitrary values, and are set to values that the user has a margin for, for example. This is because the user cannot know in advance the values of N and I that do not make the Ising machine 26 infeasible. For example, in the route determination problem of the example shown in FIG. It means that it is set to the above value.
- the data size of the QUBO model input to the Ising machine 26 is the multiplication of the coefficient of each quantum bit Q t, s, n, i obtained by equations (1) to (7) and two quantum bits.
- Q t, s, n, i ⁇ Q t′, s′, n′, i′ , which is the numerical value of the number of qubits ⁇ the number of qubits, that is, proportional to the square of the qubit. Therefore, when the number of quantum bits increases, the data size of the QUBO model also increases. Therefore, from the viewpoint of data size as well, it is preferable to reduce the number of qubits when causing the Ising machine 26 to compute the route determination problem.
- the information processing apparatus 10 has a function of reducing the number of qubits when causing the Ising machine 26 to compute the route determination problem.
- the information processing apparatus 10 includes a derivation unit 50, a generation unit 52, a control unit 54, and an acquisition unit 56.
- the CPU 20 functions as a derivation unit 50 , a generation unit 52 , a control unit 54 and an acquisition unit 56 .
- the derivation unit 50 uses a second objective function different from the first objective function to derive the minimum unknown variables i and n within a range in which a feasible solution to the route determination problem can be obtained.
- the second objective function is expressed by the following formula (8).
- the value to be minimized is the total value of I, which is the upper limit of variable i, and N, which is the upper limit of variable n.
- equation (8) by including the variables i and n in the objective function, a solution can be obtained that minimizes the number of shops visited by the truck per round and the number of rounds.
- the derivation unit 50 performs a process of solving a route determination problem in which the objective function is changed from the first objective function to the second objective function.
- the maximum value of i and n is It corresponds to the smallest value of I and N within which a feasible solution to the routing problem is obtained.
- the minimum values of I and N are hereinafter referred to as I' and N'. That is, I' and N' correspond to the minimum upper bounds I, N of the variables i, n within the range where a feasible solution of the routing problem derived using the second objective function is obtained.
- the second objective function is an objective function that can relax the constraints compared to the first objective function. Specifically, in the equation (8) showing the second objective function, since it is not necessary to calculate the travel distance of the truck, among the constraint conditions in the equations (1) to (6), Constraints (3) and (6) can be ignored. Therefore, the amount of calculation can be reduced.
- the generation unit 52 generates a QUBO model including N' and I' derived by the derivation unit 50 and the first objective function. Specifically, the generation unit 52 uses N′ and I′ derived by the derivation unit 50 and formulas (1) to (7) to generate data that allows the Ising machine 26 to solve the route determination problem. Generate a formatted QUBO model. This QUBO model contains information necessary to solve the routing problem, such as N' and I' values, constraints, a first objective function, a qubit representation method, and a problem setting.
- the upper limits I' and N' of the unknown variables i and n are smaller than I and N set by the user with a margin so that a feasible solution can be obtained. be a value. Therefore, as shown in FIG. 10 as an example, it is possible to reduce the number of qubits when causing the Ising machine 26 to compute the route determination problem. Specifically, when the qubits are arranged two-dimensionally, the qubits from the I′+1-th row to the I-th row are reduced from the first round to the N′-th round. In this case, all the qubits from the 1st row to the I-th row are reduced from the N'+1th round to the Nth round.
- the control unit 54 controls the Ising machine 26 to perform processing for solving the route determination problem defined by the QUBO model generated by the generation unit 52 . Specifically, the control unit 54 outputs the QUBO model generated by the generation unit 52 to the Ising machine 26 via the bus 27 . Further, the control unit 54 performs control to store the result of the solution-seeking process acquired by the acquisition unit 56 described later in the storage unit 22 . The control unit 54 may perform control to display the result of the solution-seeking process on the display 23 .
- the acquisition unit 56 acquires the result of the route determination problem-solving process by the Ising machine 26 from the Ising machine 26 via the bus 27 .
- the Ising machine 26 includes an acquisition unit 60 , an execution unit 62 and an output unit 64 .
- Processor 40 functions as acquisition unit 60 , execution unit 62 , and output unit 64 .
- the acquisition unit 60 acquires the QUBO model input from the CPU 20.
- the execution unit 62 executes processing for solving the route determination problem defined by the QUBO model acquired by the acquisition unit 60 .
- the output unit 64 outputs the result of the process of solving the route determination problem by the execution unit 62 to the CPU 20 via the bus 27 .
- FIG. 12 The model generation process shown in FIG. 12 is executed by the CPU 20 executing the information processing program 30 .
- the model generation process shown in FIG. 12 is executed, for example, when the user inputs an execution start instruction via the input device 24 .
- step S10 of FIG. 12 the derivation unit 50, as described above, uses the second objective function different from the first objective function to obtain the smallest unknown Derive values for variables i, n.
- step S12 the generator 52 generates a QUBO model including N' and I' derived in step S10 and the first objective function, as described above.
- step S14 the control unit 54 outputs the QUBO model generated at step S12 to the Ising machine 26 via the bus 27.
- step S ⁇ b>16 the acquisition unit 56 acquires the result of the route determination problem-solving process by the Ising machine 26 from the Ising machine 26 via the bus 27 .
- step S ⁇ b>18 the control unit 54 performs control to store the result of the solution-seeking process acquired in step S ⁇ b>16 in the storage unit 22 .
- the model generation process ends.
- the processor 40 executes the solution finding process shown in FIG.
- the acquisition unit 60 acquires the QUBO model input from the CPU 20.
- the execution unit 62 executes processing for solving the route determination problem defined by the QUBO model acquired at step S20.
- the output unit 64 outputs to the CPU 20 via the bus 27 the result of the process of solving the route determination problem by the process of step S ⁇ b>22 .
- the solution-finding process ends.
- the result of the solution-seeking process input to the CPU 20 in step S24 is acquired in step S16 of the model generation process.
- f is the variable representing the factory
- w is the variable representing the warehouse
- C f,w is the variable representing the delivery cost per product when delivering the product from the factory to the warehouse, and the product to be delivered from the factory to the warehouse.
- F be the number of factories
- W be the number of warehouses.
- the suffix "s" indicates a set.
- the first objective function in the inventory delivery problem is given by the following equation (9).
- the inventory delivery problem becomes a problem of finding the values of unknown variables x f,w .
- Constraints for solving the inventory delivery problem are, for example, that the number of products demanded in each warehouse must be met, and that the total number of products delivered from each factory to the warehouse is the number of products that can be produced by each factory, FM f or less.
- the positive decimal integers x f and w are represented by quantum bits, and the following two examples of the representation method are given. .
- a first expression method prepares a qubit group including a plurality of qubits in the number represented by the following equation (10), and at a position where the qubit is 1 in the qubit group, an unknown variable x is the way the value of f,w is expressed.
- quantum bits are arranged two-dimensionally, the vertical direction indicates the number of the warehouse, and the horizontal direction indicates the number of products to be delivered to the warehouse. That is, in the example of FIG. 15, the qubit group is a qubit array. The number of bits in the horizontal direction is the same number as the number of producible FM f . expressed. Note that the number of products to be delivered to the warehouse may be represented depending on which quantum bit has a value of 1 from the end in the horizontal direction (the right side in the example of FIG. 15).
- the position where the quantum bit value is 1 is the position shown in FIG. 16, it means that 6 products are delivered to warehouse 1 and 3 products are delivered to warehouse 2.
- the description of “0” is omitted for the portions where the value of the quantum bit is “0”, and the columns are left blank. This also applies to FIG. 18, which will be described later.
- the number of products to be delivered to the warehouse is represented at the position where the quantum bit is 1, but the number of products to be delivered to the warehouse may be represented at the position where the quantum bit is 0.
- the quantum bit values 0 and 1 shown in FIG. 16 are exchanged.
- a second expression method prepares the number of qubits represented by the following equation (11), associates one qubit with one binary digit, and combines a plurality of qubits to form an unknown binary number. is the way in which the value of the variable x f,w is represented.
- quantum bits are arranged two-dimensionally, the vertical direction indicates the number of the warehouse, and the horizontal direction indicates the number of products to be delivered to the warehouse.
- the number of bits in the horizontal direction is the same number as log 2 (FM f ), and the horizontal bit string represents a binary number. For example, if the position where the quantum bit value is 1 is the position shown in FIG. 18, it means that 6 products are delivered to warehouse 1 and 3 products are delivered to warehouse 2.
- the first representation method requires more qubits, but the constraints are simpler, so the possibility of obtaining a feasible solution is higher.
- the second representation method requires a smaller number of qubits than the first representation method, an addition is made to associate the qubits corresponding to binary numbers with decimal integers representing the number of deliveries of products. constraints, it is highly likely that a feasible solution will not be obtained.
- An example using the first representation method will be described below.
- the information processing apparatus 10 includes a derivation unit 50A, a generation unit 52A, a control unit 54, and an acquisition unit 56.
- the CPU 20 functions as a derivation unit 50A, a generation unit 52A, a control unit 54, and an acquisition unit 56.
- the derivation unit 50A uses a second objective function different from the first objective function to derive the minimum unknown variables xf,w within a range in which a feasible solution to the inventory delivery problem can be obtained.
- the second objective function is expressed by the following equation (12). Equation (12) is an equation that minimizes the maximum number of products delivered from factory f to warehouse w.
- the derivation unit 50A performs a process of solving the inventory delivery problem in which the objective function is changed from the first objective function to the second objective function.
- This M corresponds to the smallest value of the unknown variables xf,w within which a feasible solution to the inventory distribution problem can be obtained.
- this M can be said to be the minimum number of products to be delivered in all combinations of factories and warehouses that require product delivery. Therefore, the number of quantum bits required in this case is represented by the following equation (13) using M.
- equation (13) expresses that in a set of a factory and a warehouse that require product delivery, a quantum bit representing less than the minimum delivery number M is unnecessary.
- FIG. 19 shows that the quantum bits of the portion painted in gray are unnecessary. That is, in the example of FIG. 19, M ⁇ 1 qubits are reduced for warehouses that require product delivery.
- the generation unit 52A generates a QUBO model including M derived by the derivation unit 50A and the first objective function. Specifically, the generation unit 52A uses M derived by the derivation unit 50A, the constraint condition, and the first objective function to convert the inventory delivery problem into a QUBO data format executable by the Ising machine 26. Generate a model.
- the processing flow is the same as that of the first embodiment except for the optimization problem to be processed (see FIGS. 12 and 13). Therefore, the description is omitted. Specifically, only the unknown variable xf, the value M for w derived in step S10 of FIG. 12 and the QUBO model generated in step S12 differ from the first embodiment.
- the QUBO model is applied as the mathematical model handled by the Ising machine 26
- the present invention is not limited to this.
- an Ising model may be applied.
- the optimization problem is modeled by a quadratic form of a binary variable of 0 or 1
- the Ising model the optimization problem is modeled by a quadratic form of a binary variable of -1 or 1.
- the QUBO model and the Ising model can be mutually converted by a known technique.
- the hardware structure of a processing unit that executes various processes such as the derivation units 50 and 50A, the generation units 52 and 52A, the control unit 54, and the acquisition unit 56 is , a variety of processors can be used, including: As described above, the various processors include, in addition to the CPU, which is a general-purpose processor that executes software (programs) and functions as various processing units, a processor such as an FPGA whose circuit configuration can be changed after manufacture. Programmable Logic Device (PLD), ASIC (Application Specific Integrated Circuit), which is a processor with a circuit configuration specially designed to execute specific processing, such as a dedicated electric circuit.
- PLD Programmable Logic Device
- ASIC Application Specific Integrated Circuit
- One processing unit may be composed of one of these various processors, or a combination of two or more processors of the same or different type (for example, a combination of a plurality of FPGAs, or a combination of a CPU and an FPGA). combination). Also, a plurality of processing units may be configured by one processor.
- a single processor is configured by combining one or more CPUs and software.
- a processor functions as multiple processing units.
- SoC System on Chip
- a processor that realizes the functions of the entire system including multiple processing units with a single IC (Integrated Circuit) chip. be.
- various processing units are configured using one or more of the above various processors as a hardware structure.
- an electric circuit combining circuit elements such as semiconductor elements can be used.
- the information processing program 30 has been pre-stored (installed) in the storage unit 22, but the present invention is not limited to this.
- the information processing program 30 is provided in a form recorded on a recording medium such as a CD-ROM (Compact Disc Read Only Memory), a DVD-ROM (Digital Versatile Disc Read Only Memory), and a USB (Universal Serial Bus) memory. good too. Further, the information processing program 30 may be downloaded from an external device via a network.
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Abstract
Description
まず、図1及び図2を参照して、本実施形態に係る情報処理装置10のハードウェア構成を説明する。情報処理装置10の例としては、サーバコンピュータ等が挙げられる。図1に示すように、情報処理装置10は、CPU(Central Processing Unit)20、一時記憶領域としてのメモリ21、及び不揮発性の記憶部22を含む。また、情報処理装置10は、液晶ディスプレイ等のディスプレイ23、キーボードとマウス等の入力装置24、ネットワークに接続されるネットワークI/F(InterFace)25、及びイジングマシン26を含む。CPU20、メモリ21、記憶部22、ディスプレイ23、入力装置24、ネットワークI/F25、及びイジングマシン26は、バス27に接続される。情報処理装置10は、複数のイジングマシン26を備えていてもよい。
開示の技術の第2実施形態を説明する。なお、本実施形態に係る情報処理装置10及びイジングマシン26のハードウェア構成は、第1実施形態と同一であるため、説明を省略する。
Claims (6)
- 少なくとも一つのプロセッサを備え、かつ第1の目的関数を用いて未知の変数の値を求めることによって最適化問題を求解する処理であって、前記未知の変数の値がイジングマシンで前記最適化問題を求解する際の量子ビット数に相関する処理を前記イジングマシンに実行させる情報処理装置であって、
前記プロセッサは、
前記第1の目的関数とは異なる第2の目的関数を用いて前記最適化問題の実行可能解が得られる範囲内で最小の前記未知の変数に関する値を導出し、
導出した前記未知の変数に関する値及び前記第1の目的関数を含む数理モデルによって規定される前記最適化問題を求解する処理を前記イジングマシンに実行させる制御を行う
情報処理装置。 - 前記第2の目的関数は、前記第1の目的関数に比較して制約条件を緩和可能な目的関数である
請求項1に記載の情報処理装置。 - 前記未知の変数は複数の量子ビットを含む量子ビット群に格納され、
前記未知の変数の値は、量子ビット群において量子ビットが0又は1になる位置で表される
請求項1又は請求項2に記載の情報処理装置。 - 少なくとも一つのプロセッサを備えた前記イジングマシンを更に含み、
前記イジングマシンのプロセッサは、前記数理モデルによって規定される前記最適化問題を求解する処理を実行する
請求項1から請求項3の何れか1項に記載の情報処理装置。 - 少なくとも一つのプロセッサを備え、かつ第1の目的関数を用いて未知の変数の値を求めることによって最適化問題を求解する処理であって、前記未知の変数の値がイジングマシンで前記最適化問題を求解する際の量子ビット数に相関する処理を前記イジングマシンに実行させる情報処理装置の前記プロセッサが実行する情報処理方法であって、
前記第1の目的関数とは異なる第2の目的関数を用いて前記最適化問題の実行可能解が得られる範囲内で最小の前記未知の変数に関する値を導出し、
導出した前記未知の変数に関する値及び前記第1の目的関数を含む数理モデルによって規定される前記最適化問題を求解する処理を前記イジングマシンに実行させる制御を行う
情報処理方法。 - 少なくとも一つのプロセッサを備え、かつ第1の目的関数を用いて未知の変数の値を求めることによって最適化問題を求解する処理であって、前記未知の変数の値がイジングマシンで前記最適化問題を求解する際の量子ビット数に相関する処理を前記イジングマシンに実行させる情報処理装置の前記プロセッサに実行させるための情報処理プログラムであって、
前記第1の目的関数とは異なる第2の目的関数を用いて前記最適化問題の実行可能解が得られる範囲内で最小の前記未知の変数に関する値を導出し、
導出した前記未知の変数に関する値及び前記第1の目的関数を含む数理モデルによって規定される前記最適化問題を求解する処理を前記イジングマシンに実行させる制御を行う
情報処理プログラム。
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WO2020106955A1 (en) * | 2018-11-21 | 2020-05-28 | Zapata Computing, Inc. | Hybrid quantum-classical computer for packing bits into qubits for quantum optimization algorithms |
JP2020184759A (ja) | 2019-04-26 | 2020-11-12 | 京セラコミュニケーションシステム株式会社 | 量子コンピュータ等のアニーリングマシンを用いた基地局アンテナ適正化システム |
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