A simple gambling procedure called the stochastic variational method can be applied, together with appropriate variational trial functions, to solve a few-body system where the correlation between the constituents plays an important role in determining its structure. The usefulness of the method is tested by comparing to other accurate solutions for Coulombic systems. Examples of application shown here include few-nucleon systems interacting with realistic forces and few-cluster systems with the Pauli principle being taken into account properly. These examples confirm the power of the stochastic variational method. There still remain many problems for extending to a system consisting of more particles. Introduction to the stochastic variational method There are several reasons of why few-body approaches are important in nuclear physics. One is that few-nucleon systems with realisitc interactions are still very challenging and a precise few-body approach among others is needed for th
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