Translation invariant models in QFT without ultraviolet cutoffs

Abstract

The translation invariant model in quantum field theory is considered by functional integrations. Ultraviolet renormalization of the translation invariant Nelson model with a fixed total momentum is proven by functional integrations. As a corollary it can be shown that the Nelson Hamiltonian with zero total momentum has a ground state for arbitrary values of coupling constants in two dimension. Furthermore the ultraviolet renormalization of the polaron model is also studied.

This is a proceeding of 51 Winter School of Theoretical Physics Ladek Zdroj, Poland, 9 - 14 February 2015

Cited by in corpus (2)

• Feynman-Kac formulas for the ultra-violet renormalized Nelson model
• Note on ultraviolet renormalization and ground state energy of the Nelson model