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Quantum Monte Carlo: the helium atom

The hamiltonian becomes then ˆH=2212m2222m2ke2r12ke2r2+ke2r12, and Schroedingers equation reads ˆHψ=Eψ. All observables are evaluated with respect to the probability distribution P(R)=|ψT(R)|2|ψT(R)|2dR. generated by the trial wave function. The trial wave function must approximate an exact eigenstate in order that accurate results are to be obtained.