Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-energy of electrons in non-perturbative QED   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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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci