Role of small-norm components in extended random-phase approximation
Nuclear Theory
2017-08-25 v1
Abstract
The role of the small-norm amplitudes in extended RPA theories such as the particle-particle and hole-hole components of one-body amplitudes and the two-body amplitudes other than two particle - two holes components are investigated for the one-dimensional Hubbard model using an extended RPA derived from the time-dependent density-matrix theory. It is found that these amplitudes cannot be neglected in strongly interacting regions where the effects of ground-state correlations are significant.
Cite
@article{arxiv.1708.07219,
title = {Role of small-norm components in extended random-phase approximation},
author = {Mitsuru Tohyama},
journal= {arXiv preprint arXiv:1708.07219},
year = {2017}
}
Comments
11 pages, 7 figures