Quantum Calculation Control Using Parallel Energy Estimation
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Solution Overview
Problem
Quantum calculations, such as quantum chemical calculations, require numerous iterative calculations to achieve desired accuracy, leading to prolonged computation times.
Innovation Solution
A quantum calculation control method that involves a first quantum calculator performing calculations under a first condition multiple times, followed by a second calculator starting calculations based on the first energy results, allowing parallel processing under different conditions to reduce overall computation time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If many iterative calculations are performed for each calculation condition to achieve demanded calculation accuracy, then calculation accuracy is improved, but calculation time increases
Solution Approach 1:
The patent performs a preliminary calculation to obtain initial energy information before the main iterative calculation process. This preliminary action provides a starting point that accelerates convergence, reducing the number of iterative calculations needed to achieve the demanded accuracy threshold, thereby decreasing overall calculation time while maintaining accuracy requirements
Solution Approach 2:
The patent dynamically adjusts the calculation process by using obtained energy information to determine whether to continue or terminate iterative calculations. The system adapts the number of iterations based on real-time energy convergence assessment, performing calculations only as long as the accuracy threshold is not met, thus avoiding unnecessary iterative computations and reducing total calculation time
2Loss of time
If multiple quantum calculators are used to perform parallel calculations under different conditions, then calculation time is reduced, but system complexity increases
Solution Approach 1:
The patent divides the quantum calculation task into multiple segments, each executed by a different quantum calculator under specific calculation conditions. By segmenting the overall calculation into parallelizable units with distinct parameters, the system achieves faster computation through concurrent execution while managing complexity through structured task division
Solution Approach 2:
The patent creates a universal calculation framework where multiple quantum calculators execute the same type of quantum chemical calculation but under different conditions (e.g., different molecular configurations or parameters). This multi-functional approach allows parallel processing of various calculation scenarios using identical computational resources, reducing time while avoiding the need for specialized hardware for each calculation type
Data Source
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AI summary
The calculation time in quantum calculations is reduced. A computer causes a first quantum calculator among a plurality of quantum calculators that calculate a quantum state of a system subject to calculation to repeat calculations of the quantum state under a first calculation condition (for example, θ = θ0) a first number of times (N times). In addition, the computer calculates first energy (for example, E0s) of the system, based on calculation results of the first quantum calculator for a second number of times (sN times) less than the first number of times, and information on the system. Then, the computer causes a second quantum calculator among the plurality of quantum calculators to start the calculations of the quantum state under a second calculation condition (for example, θ = θ1s) designated based on the first energy, during the calculations under the first calculation condition.