Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Black hole induced false vacuum decay: The role of greybody factors   We study false vacuum decay catalyzed by black holes. We consider a toy
two-dimensional model of a scalar field with an unstable potential in the
background of a dilaton black hole. A realistic black hole in four dimensions
possesses the potential barrier for linear field perturbations. We model this
barrier -- the greybody factor -- for spherically-symmetric perturbations in
the toy model by adding a coupling between the scalar field and dilaton. We
compute analytically the decay rate for the black hole in thermal equilibrium
(Hartle-Hawking state) and for the radiating black hole in empty space (Unruh
state). Our results show that, contrary to the Hartle-Hawking vacuum, the decay
probability of the Unruh vacuum remains exponentially suppressed at all black
hole temperatures. We argue that this result holds also in four dimensions.

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The categories of this paper are: cond-mat
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
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The categories of this paper are: cs
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an