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zjwangphy

银虫 (小有名气)

[交流] 【其他】关于范德瓦尔斯力的理解 已有2人参与

我在维基百科查Hellmann–Feynman theorem时看到这样一段文字:
In the end of Feynman's paper, he states that, "Van der Waals's forces can also be interpreted as arising from charge distributions with higher concentration between the nuclei. The Schrödinger perturbation theory for two interacting atoms at a separation R, large compared to the radii of the atoms, leads to the result that the charge distribution of each is distorted from central symmetry, a dipole moment of order 1/R7 being induced in each atom. The negative charge distribution of each atom has its center of gravity moved slightly toward the other. It is not the interaction of these dipoles which leads to van der Waals's force, but rather the attraction of each nucleus for the distorted charge distribution of its own electrons that gives the attractive 1/R7 force".
这个和过去教科书上有些差别啊,大家怎么看?
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quantumfang

至尊木虫 (著名写手)

小木虫中医研究院院长

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小木虫(金币+0.5):给个红包,谢谢回帖交流
qasd(金币+1):谢谢 2010-09-05 15:29:48
教科书上怎么说的?

记得书上也是偶极相互作用?
除此之外,有用Casimir相互作用来解释的
2楼2010-09-05 14:14:40
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dxcharlary

专家顾问 (职业作家)

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小木虫(金币+0.5):给个红包,谢谢回帖交流
zzy870720z(金币+1):谢谢交流 2010-09-05 15:38:39
书上说的是偶极作用,不过只考虑了惰性气体原子,即不考虑本身的极化问题。我看上文说的意思是引入一个7次方的项来修正。
3楼2010-09-05 15:35:25
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