| 释义 |
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. |