Research Article
Cardy-Verlinde Formula of Noncommutative
Schwarzschild Black Hole
G. Abbas
Department of Mathematics, COMSATS Institute of Information Technology, Sahiwal 57000, Pakistan
Correspondence should be addressed to G. Abbas; abbasg91@yahoo.com
Received 19 November 2013; Revised 3 February 2014; Accepted 13 February 2014; Published 18 March 2014
Academic Editor: George Siopsis
Copyright © 2014 G. Abbas. Tis is an open access article distributed under the Creative Commons Attribution License, which
permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Te
publication of this article was funded by SCOAP
3
.
Few years ago, Setare (2006) has investigated the Cardy-Verlinde formula of noncommutative black hole obtained by nonco-
mmutativity of coordinates. In this paper, we apply the same procedure to a noncommutative black hole obtained by the coordinate
coherent approach. Te Cardy-Verlinde formula is entropy formula of conformal feld theory in an arbitrary dimension. It relates
the entropy of conformal feld theory to its total energy and Casimir energy. In this paper, we have calculated the total energy
and Casimir energy of noncommutative Schwarzschild black hole and have shown that entropy of noncommutative Schwarzschild
black hole horizon can be expressed in terms of Cardy-Verlinde formula.
1. Introduction
Verlinde [1] proved that the entropy of conformal feld
theory in arbitrary dimension is related to its total energy
and Casimir energy; this is known as generalized Verlinde
formula (commonly termed as Cardy-Verlinde formula).
Recently, it has been investigated that this formula holds well
for Reissner-Nordstr¨ om de-Sitter black hole (BH) [2] and
charged Kerr BH [3]. Birmingham and Mokhtari proved the
validity of Birmingham and Mokhtari [4] proved the Verlinde
formula for Taub-Bolt-Anti-de-Sitter BH. Setare and Jamil
[5] discussed the Cardy-Verlinde formula for charged BTZ
BH. Many authors [6–11] have proved the validity of Cardy-
Verlinde for diferent BHs. Te purpose of this paper is to
investigate the validity of Cardy-Verlinde entropy formula for
NC Schwarzschild BH.
In classical general relativity (GR), the curvature sin-
gularity is such a point where physical description of the
gravitational feld is impossible. Tis problem can be removed
in GR by taking into account the quantum mechanical
treatment to the standard formulation of GR. Motivated by
such reasoning, some BH solutions in noncommutative (NC)
feld theory have been derived. In these solutions, curvature
singularity at origin is removed by de-Sitter core which is
introduced due to NC nature of spacetime [12]. Ansoldi et
al. [13] formulated the NC charged BHs solutions; this was
extended to rotating noncommutative BHs case by Modesto
and Nicolini [14]. Mann and Nicoloni [15] have discussed the
cosmological production of NC BHs. Te frst NC version
of wormholes solution was investigated by Nicolini and
Spallucci [16]. Farook et al. [17] have investigated the higher
dimensional wormhole solutions in NC theory of gravity.
Motivated by such NC correction to BHs, Sharif and Abbas
[18] studied the thin shell collapse in NC Reissner-Nordstr¨ om
geometry. Banerjee and Gangopadhyay [19] derived the
Komar energy and Sammar formula for NC Schwarzschild
BH.
Motivated by the recent development in NC theory of
gravity, we have proved that the entropy of NC Schwarzschild
BH horizon can be expressed in terms of Cardy-Verlinde
formula. For this purpose, we have used the Setare and Jamil
method [5]. Te plan of the paper is as follows. In Section 2,
we briefy discussed the the thermodynamical relations of
NC Schwarzschild BH and Cardy-Verlinde formula and
proved that entropy of noncommutative Schwarzschild BH
horizon can be expressed in terms of Cardy-Verlinde formula.
Section 3 is devoted to the concluded remarks of the work
done.
Hindawi Publishing Corporation
Advances in High Energy Physics
Volume 2014, Article ID 306256, 4 pages
http://dx.doi.org/10.1155/2014/306256