Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radiation reaction in strong fields from an alternative perspective   Current classical theory of radiation reaction has several deficiencies such
as "runaway solutions" and violation of causality. The Landau-Lifshitz
approximation to the exact equation introduced by Lorentz, Abraham and Dirac is
widely used, though questions remain regarding its domain of validity. This
thesis explores an alternative treatment of the motion of a radiating electron,
based on an equation first proposed by Ford and O'Connell. A general condition
is found for solutions of this equation to deviate from those of
Landau-Lifshitz.
  By exploring radiation reaction effects on a particle colliding with an
ultra-intense laser pulse we show that the regime where there is a significant
deviation of these two approaches can never be reached with existing or
proposed laser facilities. The methods used to explore single particle
interaction with an intense laser pulse are extended to describe the
interaction of a particle bunch with various realistic laser pulses. We find
that the interaction leads to a decrease in average momentum and relative
momentum spread. However, the decrease appears to be independent of the length
of the pulse and depends only on the energy in the pulse regardless of how it
is distributed. Radiation reaction effects occuring during the scattering of an
electron by a heavy, highly-charged nucleus are studied. Radiation reaction is
seen to affect the particle's motion. We find noticeable differences between
the predictions of the Ford-O'Connell and Landau-Lifshitz equations, albeit in
regimes where quantum effects would be important.

10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat