Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fermions Tunneling from Apparent Horizon of FRW Universe   In the paper [arXiv:0809.1554], the scalar particles' Hawking radiation from
the apparent horizon of Friedmann-Robertson-Walker(FRW) universe was
investigated by using the tunneling formalism. They obtained the Hawking
temperature associated with the apparent horizon, which was extensively applied
in investigating the relationship between the first law of thermodynamics and
Friedmann equations. In this paper, we calculate Fermions' Hawking radiation
from the apparent horizon of FRW universe via tunneling formalism. Applying WKB
approximation to the general covariant Dirac equation in FRW spacetime
background, the radiation spectrum and Hawking temperature of apparent horizon
are correctly recovered, which supports the arguments presented in the paper
[arXiv:0809.1554].

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The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
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The categories of this paper are: econ
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn