Rigorous description of exchange-correlation energy of many-electron systems

Details Rigorous description of exchange-correlation energy of many-electron systems Rigorous description of exchange-correlation energy of many-electron systems

2007-12-06

arxiv.org/abs/0712.0865v1

Physics

Condensed Matter

Materials Science

9pages

Scientific paper

With the eigenfunctional theory, we study a general interacting electron system, and give a rigorous expression of its ground state energy which is composed of two parts, one part is contributed by the non-interacting electrons, and another one is represented by the correlation functions that are controlled by the electron correlation. Moreover, according to the rigorous expression of the ground state energy, an effective method beyond the local density approximation of the density functional theory is proposed.

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