Derivation of Random Phase Approximation on the Basis of the Generalized Schwinger Representation of the Fermion-Pairs
- 1 January 1977
- journal article
- Published by Oxford University Press (OUP) in Progress of Theoretical Physics
- Vol. 57 (1) , 96-111
- https://doi.org/10.1143/ptp.57.96
Abstract
A derivation of the random phase approximation is given, which is based on the generalized Schwinger representation of the fermion-pairs. The method is made of two stages : First, the truncation of the boson space is done, and secondly comes the separation of boson operators into static and fluctuating parts. The pairing vibration in the super phase and the so-called quadrupole oscillation are treated by the method, which leads to the same results as those of RPA. Then the relations of these bosons to ones appearing in RPA are clarified.Keywords
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