Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mode truncations and scattering in strong fields   Truncating quantum field theories to a dominant mode offers a
non-perturbative approach to their solution. We consider here the interaction
of charged scalar matter with a single mode of the electromagnetic field. The
implied breaking of explicit Lorentz invariance prompts us to compare
instant-form quantisation and front-form, with the latter yielding significant
simplifications when light-front zero modes are included. Using these field
theory results we reassess the validity of existing first-quantised approaches
to depletion effects in strong laser fields, and propose an alternative
interpretation based on the dressing approach to QED and its infra-red
structure.

12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph