Bubbles in the Self-Accelerating Universe
arXiv:0706.1980 · doi:10.1103/PhysRevD.76.104041
Abstract
We revisit the issue of the stability in the Dvali-Gabadadze-Porrati model, by considering the nucleation of bubbles of the conventional branch within the self-accelerating branch. We construct an instanton describing this process in the thin wall approximation. On one side of the bubble wall, the bulk consists of the exterior of the brane while on the other side it is the interior. The solution requires the presence of a 2-brane (the bubble wall) which induces the transition. However, we show that this instanton cannot be realized as the thin wall limit of any smooth solution. Once the bubble thickness is resolved, the equations of motion do not allow O(4) symmetric solutions joining the two branches. We conclude that the thin wall instanton is unphysical, and that one cannot have processes connecting the two branches, unless negative tension bubble walls are introduced. This also suggests that the self-accelerating branch does not decay into the conventional branch nucleating bubbles. We comment on other kinds of bubbles that could interpolate between the two branches.
8 pages, 5 figures
References in corpus (23)
- Cosmology on a Brane in Minkowski Bulk
- Strong Interactions and Stability in the DGP Model
- Classical and Quantum Consistency of the DGP Model
- Metastable Gravitons and Infinite Volume Extra Dimensions
- More on ghosts in DGP model
- DGP Specteroscopy
- Are there ghosts in the self-accelerating brane universe?
- Predictive Power of Strong Coupling in Theories with Large Distance Modified Gravity
- Non-linear interactions in a cosmological background in the DGP braneworld
- Braneworld Instantons
- Schwarzschild solution in brane induced gravity
- Nested braneworlds and strong brane gravity
- Perturbations of Self-Accelerated Universe
- Unexorcized ghost in DGP brane world
- Gravitational Shock Waves and Their Scattering in Brane-Induced Gravity
- Domain Walls As Probes Of Gravity
- Stealth Branes
- Cargese Lectures on Brane Induced Gravity
- Short distance non-perturbative effects of large distance modified gravity
- (De)coupling Limit of DGP
- Brane induced gravity from asymmetric warped compactification
- Self-accelerating Warped Braneworlds
- Non-perturbative materialization of ghosts
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- CFT driven cosmology and the DGP/CFT correspondence
- Spherically symmetric analysis on open FLRW solution in non-linear massive gravity
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