The $:\phi^4_4:$ quantum field theory, II. Integrability of Wick kernels

TL;DR

This paper advances the construction of the $:\,\phi^4_4:$ quantum field theory by proving the integrability of Wick kernels, enabling the development of key quantum field properties and scattering theory within a rigorous mathematical framework.

Contribution

It demonstrates that the Wick kernel of the interacting quantum field defines a unique operator-valued generalized function, establishing integrability and enabling the construction of Wightman functions and scattering operators.

Findings

Wick kernel defines a unique operator-valued generalized function

Construction of Wightman functions and scattering matrix elements

Verification of properties like positivity, locality, and unitarity

Abstract

We continue the construction of the $:\phi^4_4:$ quantum field theory. In this paper we consider the Wick kernel of the interacting quantum field. Using the complex structure and the Fock-Bargmann-Berezin-Segal integral representation we prove that this kernel defines a unique operator--valued generalized function on the space $\Sc^\alpha(\R^4)$ for any $\alpha<6/5,$ i.e. the constructed quantum field is the generalized operator-valued function of localizable Jaffe class. The same assertion is valid for the outgoing quantum field. These assertions about the quantum field allow to construct the Wightman functions, the matrix elements of the quantum scattering operator and to consider their properties (positivity, spectrality, Poincare invariance, locality, asymptotic completeness, and unitarity of the quantum scattering).