Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalized Gravitational Entropy of Interacting Scalar Field and
  Maxwell Field   The generalized gravitational entropy proposed by Lewkowycz and Maldacena in
recent is extended to the interacting real scalar field and Maxwell field
system. Using the BTZ geometry we first investigate the case of free real
scalar field and then show a possible way to calculate the entropy of the
interacting scalar field. Next, we investigate the Maxwell field system. We
exactly solve the wave equation and calculate the analytic value of the
generalized gravitational entropy. We also use the Einstein equation to find
the effect of backreaction of the Maxwell field on the area of horizon. The
associated modified area law is consistent with the generalized gravitational
entropy.

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The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys