Breakdown of Traditional Many-Body Theories for Correlated Electrons

Starting from the (Hubbard) model of an atom, we demonstrate that the uniqueness of the mapping from the interacting to the noninteracting Green function, G→G_{0}, is strongly violated, by providing numerous explicit examples of different G_{0} leading to the same physical G. We argue that there are...

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Veröffentlicht in:	Physical review letters 2017-08, Vol.119 (5), p.056402-056402, Article 056402
Hauptverfasser:	Gunnarsson, O, Rohringer, G, Schäfer, T, Sangiovanni, G, Toschi, A
Format:	Artikel
Sprache:	eng
Online-Zugang:	Volltext
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