Development of a high accuracy electronic structure theory : Quantum Monte Carlo method using electronic configurations

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The quantum Monte Carlo (QMC) method is the method to solve the Schrodinger equation by using random numbers. In this study, we developed a new QMC method in which electrons are treated as electronic configurations instead of particles. A merit of this method is that we can avoid the trial wave function dependence that is an important problem of the QMC method. We wrote a parallel program of this new method. The exact solutions were obtained in test calculations.