Hellman-Feynman theorem
Hellman-Feynman theorem
[¦hel·mən ¦fīn·mən ‚thir·əm] (quantum mechanics)
A theorem which states that in the Born-Oppenheimer approximation the forces on nuclei in molecules or solids are those which would arise electrostatically if the electron probability density were treated as a static distribution of negative electric charge.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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