Renormalization of hamiltonian field theory; a non-perturbative and non-unitarity approach

Abstract

Renormalization of hamiltonian field theory is usually a rather painful algebraic or numerical exercise. By combining a method based on the many-body coupled cluster method, analyzed in detail by Suzuki and Okamoto, with a wilsonian approach to renormalization, we show that a powerful and elegant method exist to solve such problems. The method is in principle non-perturbative, and is not necessarily unitary. © SISSA/ISAS 2003.