In quantum and theoretical chemistry, an intruder state is a particular situation arising in perturbative evaluations, where the energy of the perturbers is comparable in magnitude to the energy associated to the zero order wavefunction. In this case, a divergent behavior occurs, due to the nearly zero denominator in the expression of the perturbative correction.
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State of Trance — Armin van Buuren 2007 in New York Armin van Buuren (* 25. Dezember 1976 in Leiden, Niederlande) ist ein niederländischer Trance DJ und Produzent. Inhaltsverzeichnis 1 … Deutsch Wikipedia
N-Electron Valence state Perturbation Theory — In quantum chemistry, N Electron Valence state Perturbation Theory (NEVPT) is a perturbative treatment applicable to multireference CASCI type wavefunctions. It can be considered as a generalization of the well known second order Møller Plesset… … Wikipedia
Turnabout Intruder — ST episode name = Turnabout Intruder series = The Original Series ep num = 79 prod num = 079 remas. num = 80 date = June 3, 1969 writer = Arthur H. Singer story by Gene Roddenberry director = Herb Wallerstein guest = Majel Barrett Sandra Smith… … Wikipedia
A State Of Trance — Armin van Buuren 2007 in New York Armin van Buuren (* 25. Dezember 1976 in Leiden, Niederlande) ist ein niederländischer Trance DJ und Produzent. Inhaltsverzeichnis 1 … Deutsch Wikipedia
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n-electron valence state perturbation theory — In quantum chemistry, n electron valence state perturbation theory (NEVPT) is a perturbative treatment applicable to multireference CASCI type wavefunctions. It can be considered as a generalization of the well known second order Møller Plesset… … Wikipedia
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Castle Doctrine in the United States — A Castle Doctrine (also known as a Castle Law or a Defense of Habitation Law) is an American legal concept derived from English Common Law, which designates one s place of residence (or, in some states, any place legally occupied, such as one s… … Wikipedia
