Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The accelerated observer and quantum effects   An extended monopole detector at constant acceleration coupled to a massless
scalar field is allowed to evolve quantum mechanically. It is found that while
in the classical, followed by the point particle, limit the usual result Unruh
effect is recovered, in the point particle (before the classical) limit the
detector decouples from the scalar field and therefore the effect disappears.

17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph