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Expectation of Kinetic Energy for Deuteron
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[QUOTE="vela, post: 6856890, member: 221963"] Your book says to use method A, and you're asking, [I]shouldn't you use method B?[/I]. [USER=674023]@anuttarasammyak[/USER] has shown you that if you start with the expression from method A and use partial integration, you end up with the expression you get if you applied method B from the start. He's just asking you to verify that the final expression is indeed what you get if you apply the Laplacian to calculate ##\langle T \rangle##. You might find it instructive to work through the calculation the other way. Start with the integrand based on applying the Laplacian (since that's the one that you know should be correct based on what you already know) and use partial integration to move one of the derivatives on ##\psi## over to ##\psi^*##. See what? [/QUOTE]
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Expectation of Kinetic Energy for Deuteron
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