PHY4221 Quantum Mechanics I Fall Term of 2005 Quiz 5 (Suggested Solution) According to the principle of variational method, for the special choices of the trial wave functions described by some parameter (γin this case), the best upper bound is given by minimizing the expectation value of the Hamiltonian under consideration with the chosen trial wave function. We thus start from ()trial W.F.trialtrial22trialtrial2,,2LLEHHddxxxmdxγψψψγψ−≡==−⋅
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