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Genetic and Evolutionary Computation Conference (GECCO)

Convergence analysis of quantum-inspired genetic algorithms with the population of a single individual

Mehrshad Khosraviani, Saadat Pourmozafari, Mohammad Mehdi Ebadzadeh

Published Jul 12, 2008• 6 citations
Publisher

Abstract

In this paper, the Quantum-inspired Genetic Algorithms with the population of a single individual are formalized by a Markov chain model using a single and the stored best individual. Here, we analyze the convergence property of the Quantum-inspired Genetic Algorithms based on our proposed mathematical model, and with assumption in which its special genetic operation in the generation changes is restricted to a quantum operator; and show by means of the Markov chain analysis that the algorithm with preservation of the best individual in the population and comparison of it with the existing individual, will converge on the global optimal solution.

DOI
10.1145/1389095.1389305

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In this paper, the Quantum-inspired Genetic Algorithms with the population of a single individual are formalized by a Markov chain model using a single and the stored best individual. Here, we analyze the convergence property of the Quantum-inspired Genetic Algorithms based on our proposed mathematical model, and with assumption in which its special genetic operation in the generation changes is restricted to a quantum operator; and show by means of the Markov chain analysis that the algorithm with preservation of the best individual in the population and comparison of it with the existing individual, will converge on the global optimal solution.
Genetic algorithms are heuristic optimization techniques inspired by Darwinian evolution, which are characterized by successfully finding robust solutions for optimization problems. While quantum resources have allowed for the acceleration of many computational tasks, it remains an open question whether they can enhance the efficacy of evolutionary algorithms, particularly genetic algorithms. Here, we propose a subroutine-based quantum genetic algorithm with individuals codified in independent registers. This distinctive codification allows our proposal to depict all the fundamental elements characterizing genetic algorithms, i.e. population-based search with selection of many individuals, crossover, and mutation. Our subroutine-based construction permits us to consider several variants of the algorithm. For instance, we firstly analyze the performance of two different quantum cloning machines, a key component of the crossover subroutine. Indeed, we study two paradigmatic examples, namely, the biomimetic cloning of quantum observables and the Bužek-Hillery universal quantum cloning machine. We observed a faster average convergence of the former, but better final populations of the latter. Additionally, we analyzed the effect of introducing a mutation subroutine, concluding a minor impact on the average performance. Furthermore, we introduce a quantum channel analysis to prove the exponential convergence of our algorithm and even predict its convergence-ratio.
This paper investigates the application of quantum-inspired concepts within a genetic algorithm framework to address complex optimization challenges. Traditional genetic algorithms often struggle with slow convergence rates when dealing with intricate problem landscapes. We propose a novel approach that incorporates superposition and entanglement, mimicking key principles from quantum mechanics, into the genetic algorithm's operator design. The core idea is to leverage the ability of quantum systems to explore multiple possibilities simultaneously, thereby accelerating the search for optimal solutions. The algorithm's performance is evaluated against established genetic algorithms on a series of benchmark problems. The results demonstrate the potential of this quantum-inspired approach to significantly improve convergence speed and overall efficiency in tackling complex optimization tasks. Specifically, we analyze the impact of these operators on population diversity and the algorithm's ability to escape local optima. The paper concludes with a discussion of future research directions and potential applications of this hybrid algorithm.
This article deals with the convergence of quantum-inspired evolutionary algorithms with one quantum individual and multiple observations. Applying the theory and analytical techniques in non-homogeneous Markov chain, we obtain the conclusion that quantuminspired evolutionary algorithms could converge in probability under some mild conditions imposed on the probability amplitude of the Q-bit individual. We also analyze three cases from both theoretical and experimental viewpoints. The QEA with rotation gate can not guarantee convergence in theory, while others with modified Q-gates meet the convergence conditions. Numerical results further illustrate feasibleness and effectiveness of the improved algorithms.
In this paper, we propose a novel quantum-inspired evolutionary algorithm, called NQEA, for solving combinatorial optimization problems. NQEA uses a new Q-bit update operator to increase the balance between the exploration and exploitation of the search space. In the operator, first, the Q-bits of each individual in the population are updated based on the personal best measurement of that individual and the best measurement of current generation. Then, a restriction is applied to each Q-bit to prevent the premature convergence of its values. The results of experiments on the 0-1 knapsack and NK-landscapes problems show that NQEA performs better than a classical genetic algorithm, CGA, and two quantum-inspired evolutionary algorithms, QEA and vQEA, in terms of convergence speed and accuracy.
The double chains quantum genetic algorithm based on real coded and gradient of objective function increases the diversity of population,expands the search field about space,accelerates the algorithm evolutionary process,avoids the premature convergence phenomenon,is an effective optimization algorithm,but does prove theoretically convergence.This paper gives the corresponding theorem on the basis of previous work,theoretically proves the convergence of the algorithm by the theorem,and discusses the effects of the quantum coding and quantum rotation gate in terms of the algorithm convergence and optimization efficiency by simulation example.Results show that his research enriches and improves the double chains quantum genetic theory.