Finite and infinite boson expansions

1 May 1981

journal article
research article
Published by American Physical Society (APS) in Physical Review C

Vol. 23 (5) , 2305-2314
https://doi.org/10.1103/physrevc.23.2305

Abstract

A comparison between the finite Dyson-type and the infinite Holstein-Primakoff-type boson expansion is presented, considering both particle-hole and pairing type excitations. The significance of truncating to the truly collective branches is emphasized, and the convergence of the Holstein-Primakoff expansion is discussed. It is shown that in both expansions there is no need to construct physical basis states. Complete equivalence between the two types of expansion is exhibited by treating these excitations within models which are schematic but not totally unrealistic.

Keywords

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