Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmological Sakharov Oscillations and Quantum Mechanics of the Early
  Universe   This is a brief summary of a talk delivered at the Special Session of the
Physical Sciences Division of the Russian Academy of Sciences, Moscow, 25 May
2011. The meeting was devoted to the 90-th anniversary of A. D. Sakharov. The
focus of this contribution is on the standing-wave pattern of
quantum-mechanically generated metric (gravitational field) perturbations as
the origin of subsequent Sakharov oscillations in the matter power spectrum.
Other related phenomena, particularly in the area of gravitational waves, and
their observational significance are also discussed.

12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph