Physics Letters B 743 (2015) 184–188
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Physics Letters B
www.elsevier.com/locate/physletb
Gravitational Aharonov–Bohm effect due to noncommutative BTZ
black hole
M.A. Anacleto, F.A. Brito
∗
, E. Passos
Departamento de Física, Universidade Federal de Campina Grande, Caixa Postal 10071, 58109-970 Campina Grande, Paraíba, Brazil
a r t i c l e i n f o a b s t r a c t
Article history:
Received
16 December 2014
Received
in revised form 23 February 2015
Accepted
23 February 2015
Available
online 26 February 2015
Editor: M.
Cveti
ˇ
c
In this paper we consider the scattering of massless planar scalar waves by a noncommutative BTZ black
hole. We compute the differential cross section via the partial wave approach, and we mainly show that
the scattering of planar waves leads to a modified Aharonov–Bohm effect due to spacetime noncommu-
tativity.
© 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP
3
.
1. Introduction
Noncommutative theories have been discussed in the literature
by many authors [1–4]. The inherent nonlocality of these theo-
ries
leads to the surprising mixture between ultraviolet (UV) and
infrared (IR) divergences [5] which could break the perturbative
expansion, lead to loss of unitarity [6] and violation of Lorentz
invariance [7]. Furthermore, the study of noncommutative black
holes has been carried out by many authors in recent years. For
example, the noncommutative Banados–Teitelboim–Zanelli (BTZ)
black holes were first analyzed in [8] and in [9] the noncom-
mutative
BTZ metric was found based on the three-dimensional
equivalence
between gravity and the Chern–Simons theory which
is a three-dimensional topological quantum field theory and using
the Seiberg–Witten map with the commutative BTZ solution [10].
The BTZ black hole is a solution of (2 +1)-dimensional gravity with
negative cosmological constant and has become an important field
of investigation. It is now well accepted that three-dimensional
gravity is an excellent laboratory in order to explore and test some
of the ideas behind the AdS/CFT correspondence [11].
Noncommutative
field theories have also been an object of sev-
eral
investigations in planar physics. Among several topics in pla-
nar
physics, the Aharonov–Bohm (AB) effect [12] is one of the most
extensively studied problems. This effect is essentially the scatter-
ing
of charged particles by a flux tube and has been experimentally
confirmed by Tonomura [13] and for review see [14]. In quantum
field theory the effect has been simulated, for instance, by using
*
Corresponding author.
E-mail
addresses: anacleto@df.ufcg.edu.br (M.A. Anacleto), fabrito@df.ufcg.edu.br
(F.A. Brito),
passos@df.ufcg.edu.br (E. Passos).
a nonrelativistic field theory describing bosonic particles interact-
ing
through a Chern–Simons field [15]. It was also found to have
analogues in several physical systems such as gravitation [16], fluid
dynamics [17], optics [18] and Bose–Einstein condensates [19] ap-
pearing
in a vast literature.
The
noncommutative AB effect has been already studied in the
context of quantum mechanics [26,27] and in the quantum field
theory approach [28]. In [26] the noncommutative AB effect has
been shown to be in contrast with the commutative situation. It
was shown that the cross section for the scattering of scalar parti-
cles
by a thin solenoid does not vanish even if the magnetic field
assumes certain discrete values.
Recently,
it was shown in [20] that the scattering of planar
waves by a draining bathtub vortex describes a modified AB ef-
fect
which depends on two dimensionless parameters associated
with the circulation and draining rates [21]. The effect was shown
to be inherently asymmetric even in the low-frequency limit and
leads to novel interference patterns. In addition, we consider the
acoustic black hole metrics obtained from a relativistic fluid in a
noncommutative spacetime [29] via the Seiberg–Witten map and
also obtained from the Lorentz-violating Abelian Higgs model [30].
More recently in [25], we have extended the analysis made in [20]
to
a Lorentz-violating and noncommutative background [22] which
allows to have persistence of phase shifts even if circulation and
draining vanish.
In
general relativity, the absorption and scattering cross sections
of planar waves in the vicinity of black holes have been extensively
studied in the literature by many authors and are of great rele-
vance
to experimental investigation [23]. With the discovery of a
Higgs-like particle by the ATLAS and CMS Collaborations an extra
http://dx.doi.org/10.1016/j.physletb.2015.02.056
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© 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by
SCOAP
3
.