1977
DOI: 10.1002/qua.560120410
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The physics of the born–oppenheimer approximation

Abstract: AbstractsA new derivation of the Born-Oppenheimer separation of electronic and nuclear motion is presented. The arguments used differ from those in earlier works in not being specially designed for molecules. Instead they aim at an intuitive understanding of the qualitative behavior of the low energy bound states of any, real or hypothetical, Coulomb interacting system of particles. The virial theorem is the starting point o f the discussion. After a brief explanation of how it can be used to understand atomic… Show more

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Cited by 70 publications
(30 citation statements)
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“…4, which also presents one of the central conceptual problems of molecular structure theory: the reconstruction of the classical molecular structure from a fully quantum mechanical description. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Numerical contributions to this question can be found in Refs. 20-29. In recent work, 25,26 we introduced radial and angular density functions to recognize elements of classical molecular structure in the all-particle quantum theory as strong correlation effects for the nuclei.…”
Section: Introductionmentioning
confidence: 99%
“…4, which also presents one of the central conceptual problems of molecular structure theory: the reconstruction of the classical molecular structure from a fully quantum mechanical description. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Numerical contributions to this question can be found in Refs. 20-29. In recent work, 25,26 we introduced radial and angular density functions to recognize elements of classical molecular structure in the all-particle quantum theory as strong correlation effects for the nuclei.…”
Section: Introductionmentioning
confidence: 99%
“…In an interesting analysis of the BO separation, Essén (1977;Essén et al 1983) pointed out that, according to the virial theorem:…”
Section: Molecular Structure In the Born-oppenheimer Approximationmentioning
confidence: 99%
“…Though the separation, in principle, is symmetric [4], one finds that, in molecules, the nuclear part will depend on the electronic state. In metals this is clearly not the case: the vibrational elastic properties do not depend much on the precise state of the conduction electrons, and vice versa.…”
Section: The Electron Lattice Interactionmentioning
confidence: 99%