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math-ph2023★ 1 cited
Self-adjointness and domain of generalized spin-boson models with mild ultraviolet divergences
Sascha Lill, Davide Lonigro
We provide a rigorous construction of a large class of generalized spin-boson models with ultraviolet-divergent form factors. This class comprises various models of many possibly n…
math-ph2023★ 2 cited
Friedrichs Diagrams -- Bosonic and Fermionic
Morris Brooks, Sascha Lill
We give a mathematically precise review of a diagrammatic language introduced by Friedrichs in order to simplify computations with creation and annihilation operator products. In t…