Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lattice QED in external electromagnetic fields   We study QED in external electromagnetic fields using methods developed for
simulating lattice QCD. Our first project is to simulate QED in a constant (in
space and time) external magnetic field on a euclidean space-time lattice using
the Rational Hybrid Monte Carlo (RHMC) method. Observables we measure include
the condensate $\langle\bar{\psi}\psi\rangle$ and the effective electron action
after integrating out the fermion fields. We look for evidence that the
combined effect of the magnetic field and the electron-positron attraction from
QED produces a non-zero condensate in the limit of zero electron mass, a
non-perturbative effect analogous to spontaneous chiral symmetry breaking. Very
preliminary evidence is that such a condensate exists, at least for strong
external magnetic fields and unphysically large electric charge. In addition,
we are storing field configurations to measure the expected distortions and
screenings of the coulomb field of a charged particle due to the vacuum
polarization asymmetries produced by the magnetic field. We hope also to
measure the dynamical contribution to the electron mass produced by the same
mechanism that produces a finite condensate in the zero input mass limit.

14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
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The categories of this paper are: stat
9
The categories of this paper are: nlin