Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: UNRUH EFFECT: Introductory Notes to Quantum Effects for Accelerated
  Observers   These pedagogical notes are dedicated to a derivation of the Unruh effect.
There is special emphasis on the transparency of the arguments and the
exhibition of detailed calculations. We assume the reader has a basic knowledge
of quantum mechanics and relativity. The notes can hopefully be used in a
self-contained way by advanced undergraduate or beginning graduate students.

28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin