arXiv:nucl-th/9802042·v1·Nuclear Theory
An improvement on RPA based on a Boson mapping
Shi-Lin Zhu · Zhi-ning Zhou · Ze-sen Yang · (Physics Department, Peking University)
Abstract
We use a solvable model to perform modified dyson mapping and reveal the unphysical-state effects in the original Random Phase Approximation (RPA). We then propose a method to introduce the RPA and improve it based on a Boson mapping.