scholarly journals Brane-world cosmology of modulus stabilization with a bulk scalar field

2001 ◽  
Vol 64 (2) ◽  
Author(s):  
James M. Cline ◽  
Hassan Firouzjahi
Keyword(s):  
Scalar Field ◽  
Brane World ◽  
Modulus Stabilization ◽  
Bulk Scalar Field

scholarly journals Vacuum Expectation Value Profiles of the Bulk Scalar Field in the Generalized Randall-Sundrum Model

2015 ◽  
Vol 2015 ◽  
pp. 1-10
Author(s):  
A. Tofighi ◽  
M. Moazzen ◽  
A. Farokhtabar
Keyword(s):  
Scalar Field ◽  
Boundary Conditions ◽  
Cosmological Constant ◽  
Vacuum Expectation ◽  
Vacuum Expectation Value ◽  
Brane World ◽  
Dirichlet Boundary Conditions ◽  
World Model ◽  
Expectation Value ◽  
Bulk Scalar Field

In the generalized Randall-Sundrum warped brane-world model the cosmological constant induced on the visible brane can be positive or negative. In this paper we investigate profiles of vacuum expectation value of the bulk scalar field under general Dirichlet and Neumann boundary conditions in the generalized warped brane-world model. We show that the VEV profiles generally depend on the value of the brane cosmological constant. We find that the VEV profiles of the bulk scalar field for a visible brane with negative cosmological constant and positive tension are quite distinct from those of Randall-Sundrum model. In addition we show that the VEV profiles for a visible brane with large positive cosmological constant are also different from those of the Randall-Sundrum model. We also verify that Goldberger and Wise mechanism can work under nonzero Dirichlet boundary conditions in the generalized Randall-Sundrum model.

scholarly journals Creation of a brane world with a bulk scalar field

2006 ◽  
Vol 31 ◽  
pp. 219-220
Author(s):  
Koh-suke Aoyanagi ◽  
Kei-ichi Maeda
Keyword(s):  
Scalar Field ◽  
Brane World ◽  
Bulk Scalar Field

scholarly journals BRANE-WORLD COSMOLOGY AND VARYING G

2010 ◽  
Vol 25 (18n19) ◽  
pp. 3835-3856 ◽  
Author(s):  
LEONARDO AMARILLA ◽  
HÉCTOR VUCETICH
Keyword(s):  
Scalar Field ◽  
Cosmological Model ◽  
Time Variation ◽  
Brane World ◽  
Brane Tension ◽  
Bulk Scalar Field

We consider a brane-world cosmological model coupled to a bulk scalar field. Since the brane tension turns out to be proportional to Newton's coupling G, in such a model a time variation of G naturally occurs. By resorting to available bounds on the variation of G, the parameters of the model are constrained. The constraints coming from nucleosynthesis and CMB result to be the severest ones.

scholarly journals Mass of the Stabilized Radion in the Limit of Finite Quartic Coupling

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Ali Tofighi ◽  
Vahid Reza Shajiee
Keyword(s):  
Scalar Field ◽  
Boundary Conditions ◽  
General Boundary ◽  
General Boundary Conditions ◽  
Quartic Coupling ◽  
Modulus Stabilization ◽  
Bulk Scalar Field ◽  
Stabilization Condition ◽  
Analytical Expressions

We present an exact treatment of the modulus stabilization condition with the general boundary conditions of the bulk scalar field in the Randall-Sundrum model. We find analytical expressions for the value of the modulus and the mass of the radion.

scholarly journals Creation of a brane world with a bulk scalar field

2006 ◽  
Vol 2006 (03) ◽  
pp. 012-012 ◽  
Author(s):  
Koh-suke Aoyanagi ◽  
Kei-ichi Maeda
Keyword(s):  
Scalar Field ◽  
Brane World ◽  
Bulk Scalar Field

scholarly journals BRANE WORLD IN A TOPOLOGICAL BLACK HOLES IN ASYMPTOTICALLY FLAT SPACE–TIME

2001 ◽  
Vol 16 (26) ◽  
pp. 1703-1710 ◽  
Author(s):  
DONAM YOUM
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Scalar Field ◽  
Flat Space ◽  
Space Time ◽  
Brane World ◽  
Black Hole Horizon ◽  
World Model ◽  
Asymptotically Flat ◽  
Bulk Scalar Field

We study static brane configurations in the bulk background of the topological black holes in asymptotically flat space–time and find that such configurations are possible even for flat black hole horizon, unlike the AdS black hole case. We construct the brane world model with an orbifold structure S1/Z2 in such bulk background and study massless bulk scalar field.

scholarly journals SELF-TUNING DARK ENERGY IN BRANE WORLD COSMOLOGY

2001 ◽  
Vol 16 (17) ◽  
pp. 1089-1099 ◽  
Author(s):  
KUNIHITO UZAWA ◽  
JIRO SODA
Keyword(s):  
Dark Energy ◽  
Scalar Field ◽  
Vacuum Energy ◽  
Friedmann Equation ◽  
Brane World ◽  
Tuning Mechanism ◽  
Enormous Amount ◽  
Self Tuning ◽  
Bulk Scalar Field

In this letter, the self-tuning mechanism of dark energy is proposed by considering the cosmological matter in the brane world. In the first part of this letter, the effective four-dimensional Friedmann equation in the presence of the bulk scalar field is derived. In our model, the bulk scalar field takes the role of the dark energy and its value is slowly varying in time. The claim is that, even if the enormous amount of vacuum energy exists on the brane, the present value of the dark energy is self-tuned to be consistent with the current observations. This result will open the possibility to discuss the dark energy in the brane world in the context of the anthropic principle or quantum cosmology.

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