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Self-consistent approximation to the polarization propagator

✍ Scribed by Brian Weiner; Osvaldo Goscinski

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
732 KB
Volume
18
Category
Article
ISSN
0020-7608

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✦ Synopsis

Abstract

A theorem is presented that characterizes approximate states and truncated operator manifolds associated with self‐consistent approximate propagators. This theorem establishes a natural relationship between Hermiticity, stationarity, nonredundance and completeness of operator manifolds, model time evolution, and the vacuum condition. For the case of the polarization propagator we describe algorithms by which we can construct states and manifolds that satisfy this theorem and the vacuum condition.

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