Quantum mechanics
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Intermolecular force
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Richard Feynman
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Theorems in quantum physics
Hellmann–Feynman theorem
In quantum mechanics, the Hellmann–Feynman theorem relates the derivative of the total energy with respect to a parameter, to the expectation value of the derivative of the Hamiltonian with respect to...
Hellmann–Feynman theorem - Wikipedia
Hellmann–Feynman theorem - Wikipedia