On the Approximation in the Hermitian Treatment of Dyson Boson Expansion Theory

We discuss the Hermitian treatment of the Dyson-type boson expansion theory. We show that the basic assumption of the conventional treatment does not hold in general and that the method is only approximately valid. The exception is the case in which the multi-phonon states are mutually orthogonal, w...

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Veröffentlicht in:	Progress of theoretical and experimental physics 1999-03, Vol.101 (3), p.579-590
Hauptverfasser:	Kajiyama, Atsushi, Taniguchi, Kimikazu, Miyanishi, Yoshinao
Format:	Artikel
Sprache:	eng
Online-Zugang:	Volltext
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