Ground State Energy of the Helium Using Variational Methods on Trial Wave Functions

Helium is a quantum system that has two electrons and one proton, the calculation of the ground state energy of helium has been done by variational method, the advantages of variational method is that it can be performed flexible selection of wave function. The objective of this study is to calculate the ground state energy of helium by using variational methods on the new wave function. From the research results obtained the ground state energy of helium equal to -77.333 eV. The result of this calculation is close to the experimental value.