scholarly journals Greybody factors for a nonminimally coupled scalar field in BTZ black hole background

2017 ◽  
Vol 772 ◽  
pp. 523-528 ◽  
Author(s):  
Grigoris Panotopoulos ◽  
Ángel Rincón
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Btz Black Hole ◽  
Black Hole Background

scholarly journals Normal-mode analysis for scalar fields in BTZ black-hole background

2009 ◽  
Vol 60 (2) ◽  
pp. 169-173 ◽  
Author(s):  
Sayan K. Chakrabarti ◽  
Pulak Ranjan Giri ◽  
Kumar S. Gupta
Keyword(s):  
Black Hole ◽  
Normal Mode ◽  
Normal Mode Analysis ◽  
Scalar Fields ◽  
Mode Analysis ◽  
Btz Black Hole ◽  
Black Hole Background

scholarly journals Thin-shell wormholes in (2 + 1)-dimensional Einstein-scalar theory

2017 ◽  
Vol 32 (10) ◽  
pp. 1750064 ◽  
Author(s):  
S. Habib Mazharimousavi ◽  
Z. Amirabi ◽  
M. Halilsoy
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Thin Shell ◽  
Infinite Class ◽  
Btz Black Hole ◽  
Scalar Theory ◽  
Potential Barriers ◽  
Field Extensions ◽  
Linear Perturbations ◽  
Thin Shell Wormholes

We present an infinite class of one-parameter scalar field extensions to the Bañados, Teitelboim and Zanelli (BTZ) black hole in 2 + 1 dimensions. By virtue of the scalar charge, the thin-shell wormhole supported by a linear fluid at the throat becomes stable against linear perturbations. More interestingly, we provide an example of thin-shell wormhole which is strictly stable in the sense that it is confined in between two classically intransmissible potential barriers.

scholarly journals Scalar field dynamics in warped AdS3 black hole background

2009 ◽  
Vol 680 (5) ◽  
pp. 500-505 ◽  
Author(s):  
Sayan K. Chakrabarti ◽  
Pulak Ranjan Giri ◽  
Kumar S. Gupta
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Black Hole Background ◽  
Scalar Field Dynamics

A holographic superconductor model with higher correction terms

2015 ◽  
Vol 30 (13) ◽  
pp. 1550069
Author(s):  
Yan Peng ◽  
Guohua Liu
Keyword(s):  
Phase Transition ◽  
Black Hole ◽  
Scalar Field ◽  
Model Parameters ◽  
Holographic Superconductor ◽  
Transition Diagram ◽  
Holographic Superconductors ◽  
Black Hole Background ◽  
Correction Terms ◽  
Matter Fields

We study general models for holographic superconductors with higher correction terms of the scalar field in the four-dimensional AdS black hole background including the matter fields' backreaction on the metric. We explore the effects of the model parameters on the scalar condensation and find that different values of model parameters can determine the order of phase transitions. Moreover, we find that the higher correction terms provide richer physics in the phase transition diagram.

Area spectrum from quasinormal modes of a Lifshitz black hole in 2+1 dimensions

2015 ◽  
Vol 30 (13) ◽  
pp. 1550078 ◽  
Author(s):  
Sharmanthie Fernando
Keyword(s):  
Black Hole ◽  
Mass Spectrum ◽  
Scalar Field ◽  
Quasinormal Modes ◽  
Area Spectrum ◽  
Conformal Gravity ◽  
Btz Black Hole ◽  
The Future ◽  
Lifshitz Black Hole

In this paper, we have studied the area and mass spectrum of a Lifshitz black hole in 2+1 dimensions. This black hole is obtained for conformal gravity in 2+1 dimensions and is asymptotic to z = 0 Lifshitz spacetime. Quasinormal modes (QNM) frequencies of the conformally coupled scalar field perturbations are employed for the purpose of analyzing the area spectrum of the black hole. We have used two methods: modified Hod's conjecture and Kunsttater's method. In both methods, the area and the mass spectrum is shown to be equally spaced. We compared our results with the area spectrum of the BTZ black hole and the z = 3 black hole and made suggestions to extend this work in the future.

scholarly journals Effects of Noncommutativity on the Black Hole Entropy

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Kumar S. Gupta ◽  
E. Harikumar ◽  
Tajron Jurić ◽  
Stjepan Meljanac ◽  
Andjelo Samsarov
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Deformation Parameter ◽  
Black Hole Entropy ◽  
Brick Wall ◽  
Btz Black Hole ◽  
First Order ◽  
Hole Geometry ◽  
Wall Method

The BTZ black hole geometry is probed with a noncommutative scalar field which obeys theκ-Minkowski algebra. The entropy of the BTZ black hole is calculated using the brick wall method. The contribution of the noncommutativity to the black hole entropy is explicitly evaluated up to the first order in the deformation parameter. We also argue that such a correction to the black hole entropy can be interpreted as arising from the renormalization of the Newton’s constant due to the effects of the noncommutativity.

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