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Seminar of the Department of Mathematical Physics, Steklov Mathematical Institute of RAS
February 11, 2021 11:00, Moscow, online
 


Causal perturbative QED and white noise

Jaroslaw Wawrzyckiab

a BLTP, Dubna
b INP PAS, Krakow
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MP4 436.9 Mb

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Abstract: We will briefly present the Bogoliubov's causal perturbative QFT, which includes only one refinement: the creation-annihilation operators at a point (for a specific momentum) are mathematically interpreted as the Hida operators from white noise analysis. We leave the rest of the theory completely unchanged. This allows avoiding infrared (and ultraviolet) divergences in the transition to the adiabatic limit for interacting fields. We will present the essence of the argument for the removal of IR divergence in passing to the adiabatic limit $g \to 1$ for interacting fields and for the removal of UV divergence. In order to illustrate the Epstein-Glaser method for the removal of UV divergence we consider a particular one loop contribution to the scattering operator. We give a rigorous formulation, as a theorem, of a particular result concerning the adiabatic limit $g \to 1$ for interacting fields.

Language: English
 
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