Infrared renormalization in non-relativistic QED and scaling criticality

Details Infrared renormalization in non-relativistic QED and scaling criticality Infrared renormalization in non-relativistic QED and scaling criticality

2006-01-06

arxiv.org/abs/math-ph/0601010v3

Journal of Functional Analysis, 254 (10), 2555 - 2647, 2008.

Physics

Mathematical Physics

AMS Latex. 80 pages

Scientific paper

We consider a spin-$\frac12$ electron in a translation-invariant model of non-relativistic Quantum Electrodynamics (QED). Let $H(\vp,\sig)$ denote the fiber Hamiltonian corresponding to the conserved total momentum $\vp\in\R^3$ of the Pauli electron and the photon field, regularized by a fixed ultraviolet cutoff in the interaction term, and an infrared regularization parametrized by $0<\sig\ll1$ which we ultimately remove by taking $\sig\searrow0$. For $|\vp|<\puppbd$, all $\sig>0$, and all values of the finestructure constant $\gs<\gs_0$, with $\gs_0\ll1$ sufficiently small and {\em independent} of $\sig$, we prove the existence of a ground state eigenvalue of multiplicity two at the bottom of the essential spectrum. Moreover, we prove that the renormalized electron mass satisfies $1

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