Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical rotational frequency shift   The term rotational frequency shift (RFS) has been used in different contexts
and it was given different meanings. Other terms have also been used (azimuthal
Doppler shift, angular Doppler shift) to describe various related phenomena. In
this article we stick to the meaning of the rotational frequency shift given by
us in Phys. Rev. Lett.78, 2539 (1977). In order to make a clear distinction
between our RFS and other related shifts we use the term dynamical RFS (DRFS).
We will study the spectral properties of radiation emitted by rotating quantum
sources.

3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph