Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Thermodynamics and Quantum Entanglement Entropies in an
  Expanding Universe   We investigate an asymptotically spatially flat Robertson-Walker spacetime
from two different perspectives. First, using von Neumann entropy, we evaluate
the entanglement generation due to the encoded information in spacetime. Then,
we work out the entropy of particle creation based on the quantum
thermodynamics of the scalar field on the underlying spacetime. We show that
the general behavior of both entropies are the same. Therefore, the
entanglement can be applied to the customary quantum thermodynamics of the
universe. Also, using these entropies, we can recover some information about
the parameters of spacetime.

10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
1
The categories of this paper are: cs
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an