Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermalized Vacuum and Vacuum Effects   Some of the well-known effects regarding the vacuum are revisited under the
formalism of the imaginary-time field theory. From these effects, they could
imply the existence of one thermal vacuum in different circumstances. The
imaginary-time hamiltonian of the vacuum is found to provide not only exact
distribution functions in the calculations of the Casimir effect and the Van
der Waals force but also cutoff functions. The thermal bath for the Unruh
effect is constructed from the imaginary-time Green function. From the field
theory in the curved space-time, field quantizations are defined according to
different vacuum states and lead to the Hawking radiation; the introduced
conformal invariance agree with the formalism of the imaginary-time field
theory. The induced Green functions in the curved space-time are in accordance
with those from the picture given from the thermal vacuum.

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The categories of this paper are: chem-ph
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat