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Self-energy of electrons in non-perturbative QED

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arxiv math-ph/9908020 v2 pith:QTSHIZQQ submitted 1999-08-20 math-ph hep-thmath.MP

classification math-phhep-thmath.MP
keywords boundsbosonsfreenon-perturbativebindingchargedconsideredcutoff
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abstract

Various models of charged particles interacting with a quantized, ultraviolet cutoff radiation field (but not with each other) are investigated. Upper and lower bounds are found for the self- or ground state-energies without mass renormalization. For $N$ fermions the bounds are proportional to $N$, but for bosons they are sublinear, which implies `binding', and hence that `free' bosons are never free. Both `relativistic' and non-relativistic kinematics are considered. Our bounds are non-perturbative and differ significantly from the predictions of perturbation theory.

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  1. Ultraviolet Renormalization of Spin Boson Models I. Normal and 2-Nilpotent Interactions

    math-ph 2025-02 conditional novelty 7.0 of 10

    The paper proves that generalized spin-boson models with normal or 2-nilpotent interactions can be ultraviolet renormalized, with norm resolvent convergence of the regularized Hamiltonians to an explicitly constructed...

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