scholarly journals Holography and trace anomaly: What is the fate of (brane-world) black holes?

2004 ◽  
Vol 69 (8) ◽  
Author(s):  
Roberto Casadio
Keyword(s):  
Black Holes ◽  
Brane World ◽  
Trace Anomaly

NONCOMMUTATIVE D-BRANE WORLD, BLACK HOLES AND EXTRA DIMENSIONS

2009 ◽  
Vol 24 (18n19) ◽  
pp. 3571-3576 ◽  
Author(s):  
SUPRIYA KAR
Keyword(s):  
Black Holes ◽  
String Theory ◽  
Extra Dimensions ◽  
Space Time ◽  
Brane World ◽  
Spherically Symmetric ◽  
Axially Symmetric ◽  
Ordinary Space ◽  
Classical Black Holes ◽  
Type Iib String Theory

Inspired by the space-time noncommutativity on a D5-brane world, in a type IIB string theory, we explore the possibility of an emergent 4D ordinary space-time in the formalism. In particular, a curved D3-brane dynamics is worked out to obtain an axially symmetric and a spherically symmetric AdS and dS black holes. Extremal geometries are analyzed, using the noncommutative scaling. The emerging two dimensional semi-classical black holes are investigated to yield evidence for extra dimensions in the curved brane-world. Interestingly, a tunneling between dS to AdS vacua in the formalism is briefly discussed by incorporating the Hagedorn transitions in string theory.

scholarly journals On brane-world black holes and short scale physics

2003 ◽  
Vol 307 (2) ◽  
pp. 195-208 ◽  
Author(s):  
Roberto Casadio
Keyword(s):  
Black Holes ◽  
Brane World ◽  
Short Scale

scholarly journals Brane-world black holes and the scale of gravity

2011 ◽  
Vol 2011 (9) ◽  
Author(s):  
Gian Luigi Alberghi ◽  
Roberto Casadio ◽  
Octavian Micu ◽  
Alessio Orlandi
Keyword(s):  
Black Holes ◽  
Brane World

scholarly journals DISCUSSION ON SOME CHARACTERISTICS OF CHARGED BRANE-WORLD BLACK HOLES

2009 ◽  
Vol 24 (04) ◽  
pp. 719-739 ◽  
Author(s):  
M. KALAM ◽  
F. RAHAMAN ◽  
A. GHOSH ◽  
B. RAYCHAUDHURI
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Gravitational Field ◽  
Scalar Field ◽  
Brane World ◽  
Massless Scalar ◽  
Massless Scalar Field ◽  
Effective Potentials ◽  
Test Particles ◽  
Jacobi Formalism

Several physical natures of charged brane-world black holes are investigated. Firstly, the timelike and null geodesics of the charged brane-world black holes are presented. We also analyze all the possible motions by plotting the effective potentials for various parameters for circular and radial geodesics. Secondly, we investigate the motion of test particles in the gravitational field of the charged brane-world black holes using the Hamilton–Jacobi formalism. We consider charged and uncharged test particles and examine their behavior in both static and nonstatic cases. Thirdly, the thermodynamics of the charged brane-world black holes are studied. Finally, it is shown that there is no phenomenon of superradiance for an incident massless scalar field for such a black hole.

scholarly journals DENOUEMENT OF A WORMHOLE–BRANE ENCOUNTER

2009 ◽  
Vol 18 (12) ◽  
pp. 1809-1819
Author(s):  
ENRICO RODRIGO
Keyword(s):  
Black Holes ◽  
Dark Matter ◽  
Brane World ◽  
Dark Matter Candidate ◽  
Brane Worlds ◽  
Higher Dimensional ◽  
The Creation ◽  
World Ethos ◽  
Baby Universe

Higher-dimensional black holes have long been considered within the context of brane worlds. Recently, it was shown that the brane-world ethos also permits the consideration of higher-dimensional wormholes. When such a wormhole, pre-existing in the bulk, impinges upon our universe, taken to be a positive-tension three-brane, it can induce the creation in our universe of a wormhole of ordinary dimensionality. The throat of this wormhole might fully constrict, pinch off, and thus birth a baby universe. Alternatively, the induced wormhole might persist. I show that persistence is more likely and note that the persistent wormhole manifests itself as a particle-like object whose interaction with cosmic matter is purely gravitational. I consider the viability of this object as a dark matter candidate.

scholarly journals SCALAR FIELD ENTROPY IN BRANE WORLD BLACK HOLES

2006 ◽  
Vol 21 (12) ◽  
pp. 2519-2525 ◽  
Author(s):  
K. K. NANDI ◽  
Y.-Z. ZHANG ◽  
A. BHADRA ◽  
P. MITRA
Keyword(s):  
Black Holes ◽  
Scalar Field ◽  
Extreme Values ◽  
Brane World ◽  
Brick Wall

A semiclassical calculation of entropy of a scalar field in the background of a class of brane world black holes (BWBH) is carried out in the presence of a brick wall cutoff when the 5D-bulk induced "tidal charge" has generic or extreme values.

scholarly journals ROTATING BLACK HOLES IN HIGHER DIMENSIONAL BRANE WORLDS

2006 ◽  
Vol 15 (02) ◽  
pp. 171-188 ◽  
Author(s):  
GAUTAM SENGUPTA
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Causal Structure ◽  
Brane World ◽  
Black String ◽  
Brane Worlds ◽  
Rotating Black Hole ◽  
Geodesic Equations ◽  
Higher Dimensional ◽  
Rotating Black Holes

A black string generalization of the Myers–Perry N-dimensional rotating black hole is considered in an (N + 1)-dimensional Randall–Sundrum brane world. The black string intercepts the (N - 1) brane in a N-dimensional rotating black hole. We examine the diverse cases arising for various non-zero rotation components and obtain the geodesic equations for these space–times. The causal structure and asymptotics of the resulting brane world geometries are analyzed.

scholarly journals Trace Anomaly and Nonlocal Effective Action for 2-D Conformally Invariant Scalar Interacting with Dilaton

1997 ◽  
Vol 12 (28) ◽  
pp. 2083-2087 ◽  
Author(s):  
Shin'ichi Nojiri ◽  
Sergei D. Odintsov
Keyword(s):  
Black Holes ◽  
Effective Action ◽  
Conformal Anomaly ◽  
Back Reaction ◽  
Conformally Invariant ◽  
Trace Anomaly ◽  
Invariant Scalar ◽  
The One

Using the results of the calculation of the one-loop effective action (E. Elizalde et al., Phys. Rev.D49, 2852 (1994)), we find the trace anomaly for most general conformally invariant 2-D dilaton coupled scalar–dilaton system (the contribution of dilaton itself is included). The nonlocal effective action induced by conformal anomaly for such system is found. That opens new possibilities in generalizing of CGHS-like model for the study of back-reaction of matter to 2-D black holes.

scholarly journals Dilatonic brane-world black holes, gravity localization, and Newton’s constant

2000 ◽  
Vol 62 (6) ◽  
Author(s):  
Shin’ichi Nojiri ◽  
Octavio Obregon ◽  
Sergei D. Odintsov ◽  
Sachiko Ogushi
Keyword(s):  
Black Holes ◽  
Brane World ◽  
Gravity Localization
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