We develop a scheme to exactly evaluate the correlation energy in the random-phase approximation, based on linear response theory. It is demonstrated that our formula is completely equivalent to a contour integral representation recently proposed by Donau et al. being numerically more efficient for realistic calculations. Numerical examples are presented for pairing correlations in rapidly rotating nuclei.
@article{arxiv.nucl-th/9911039,
title = {On the Response Function Technique for Calculating the Random-Phase Approximation Correlation Energy},
author = {Y. R. Shimizu and P. Donati and R. A. Broglia},
journal= {arXiv preprint arXiv:nucl-th/9911039},
year = {2009}
}