Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermal radiation in curved spacetime using influence functional
  formalism   Generalizing to relativistic exponential scaling and using the theory of
noise from quantum fluctuations, it has been shown that one vacuum (Rindler,
Hartle-Hawking, or Gibbons-Hawking for the cases of the uniformly accelerated
detector, black hole, and de-Sitter universe, respectively) can be understood
as resulting from the scaling of quantum noise in another vacuum. We explore
this idea more generally to establish a flat spacetime and curved spacetime
analogy. For this purpose, we start by examining noise kernels for free fields
in some well-known curved spacetimes, e.g., the spacetime of a charged black
hole, the spacetime of a Kerr black hole, Schwarzschild-de Sitter,
Schwarzschild anti-de Sitter, and Reissner-Nordstrom de-Sitter spacetimes.
Here, we consider a maximal analytical extension for all these spacetimes and
different vacuum states. We show that the exponential scale transformation is
responsible for the thermal nature of radiation.

23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org