Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of quantum corrections on the criticality and efficiency of
  black holes surrounded by a perfect fluid   We study some properties of the extended phase space of a quantum-corrected
Schwarzschild black hole surrounded by a perfect fluid. In particular we
demonstrate that, due to the quantum correction, there exist first and second
order phase transitions for a certain range of the state parameter of the
perfect fluid, and we explicitly analyze some cases. Besides that, we describe
the efficiency of this system as a heat engine and the effect of quantum
corrections for different surrounding fluids.

6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ