The cosmological constant and dark energy in braneworlds

Abstract

We review recent attempts to address the cosmological constant problem and the late-time acceleration of the Universe based on braneworld models. In braneworld models, the way in which the vacuum energy gravitates in the 4D spacetime is radically different from conventional 4D physics. It is possible that the vacuum energy on a brane does not curve the 4D spacetime and only affects the geometry of the extra-dimensions, offering a solution to the cosmological constant problem. We review the idea of supersymmetric large extra dimensions that could achieve this and also provide a natural candidate for a quintessence field. We also review the attempts to explain the late-time accelerated expansion of the universe from the large-distance modification of gravity based on the braneworld. We use the Dvali-Gabadadze-Porrati model to demonstrate how one can distinguish this model from dark energy models in 4D general relativity. Theoretical difficulties in this approach are also addressed.

Invited Review for a special Gen. Rel. Grav. issue on Dark Energy, 22 pages, 13 figures, references added

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• DGP Specteroscopy
• Observational constraints on self-accelerating cosmology
• Predictive Power of Strong Coupling in Theories with Large Distance Modified Gravity
• Non-linear interactions in a cosmological background in the DGP braneworld
• Schwarzschild solution in brane induced gravity
• Perturbations of Self-Accelerated Universe
• Accelerating cosmologies tested by distance measures
• Cosmological constraints combining H(z), CMB shift and SNIa observational data
• Near-Horizon Solution for DGP Perturbations
• (De)coupling Limit of DGP
• Dynamical solutions of warped six dimensional supergravity
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Cited by in corpus (22)

• Wormhole geometries supported by a nonminimal curvature-matter coupling
• N-body Simulations for f(R) Gravity using a Self-adaptive Particle-Mesh Code
• Non-linear Evolution of Matter Power Spectrum in Modified Theory of Gravity
• Classifying and avoiding singularities in the alternative gravity dark energy models
• Phantom stars and topology change
• Consistency test of general relativity from large scale structure of the Universe
• Growth Index of DGP Model and Current Growth Rate Data
• How to Distinguish Dark Energy and Modified Gravity?
• Cosmological perturbations in the DGP braneworld: numeric solution
• Induced gravity on intersecting brane-worlds Part I: Maximally symmetric solutions
• Induced gravity on intersecting brane-worlds Part II: Cosmology
• Exact nonlinear inhomogeneities in $\Lambda$CDM cosmology
• Probing the nature of cosmic acceleration
• Codimension-2 brane inflation
• Conceptual problems in detecting the evolution of dark energy when using distance measurements
• Curvature corrections to the low energy effective theory in 6D regularized braneworlds
• UV caps, IR modification of gravity, and recovery of 4D gravity in regularized braneworlds
• The Friedmann equations in deformed Hořava-Lifshitz gravity and Debye model
• Observational Constraints on Phantom Crossing DGP Gravity
• Orbifold Branes in the $M_D\times M_{d^{+}}\times M_{d^{-}}$ Compactification of type II string on $S^1/Z_2$ and their cosmological applications
• Braneworlds with timelike extra-dimension
• Conical singularities regularized in warped six-dimensional flux compactification and their induced brane cosmology