Enumeration of many-body skeleton diagrams
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- 作者：L. G. Molinari and N. Manini
- 关键词：PACS. 71.10. ; w Theories and models of many ; electron systems ; 24.10.Cn Many ; body theory ; 11.10.Gh Renormalization
- 刊名：The European Physical Journal B - Condensed Matter
- 出版时间：June 2006
- 出版年：2006
- 期刊代码：35_1434-6028
- 类别：bus
- 卷：51
- 期：3
- 页码：331-336
- 数据来源：sp
摘要
The many-body dynamics of interacting electrons in condensed matter and quantum chemistry is often studied at the quasiparticle level, where the perturbative diagrammatic series is partially resummed. Based on Hedin's equations for self-energy, polarization, propagator, effective potential, and vertex function, dressed (skeleton) Feynman diagrams are enumerated. Such diagram counts provide useful simple checks for extensions of the theory for future realistic simulations.