Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The physics of adiabatic particle number in the Schwinger effect   The production of electron-positron pairs from light is a famous prediction
of quantum electrodynamics. Yet it is often emphasised that the number of
produced pairs has no physical meaning until the driving electromagnetic fields
are switched off, as otherwise its definition is basis-dependent. The common
adiabatic definition, in particular, can predict the `creation' of a number of
pairs orders of magnitude larger than the final yield. We show here, by
clarifying exactly what is being counted, that the adiabatic number of pairs
has an unambiguous and physical interpretation. As a result, and perhaps
contrary to expectation, the large numbers of pairs seen at non-asymptotic
times become, in principle, physically accessible.

15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom