Perturbative Tamm-Dancoff Renormalization
High Energy Physics - Theory
2009-10-30 v1
Abstract
A new two-step renormalization procedure is proposed. In the first step, the effects of high-energy states are considered in the conventional (Feynman) perturbation theory. In the second step, the coupling to many-body states is eliminated by a similarity transformation. The resultant effective Hamiltonian contains only interactions which do not change particle number. It is subject to numerical diagonalization. We apply the general procedure to a simple example for the purpose of illustration.
Cite
@article{arxiv.hep-th/9610020,
title = {Perturbative Tamm-Dancoff Renormalization},
author = {Koji Harada and Atsushi Okazaki},
journal= {arXiv preprint arXiv:hep-th/9610020},
year = {2009}
}
Comments
20 pages, RevTeX, 10 figures