Vacuum Bubble in an Inhomogeneous Cosmology
arXiv:0711.3417 · doi:10.1088/1126-6708/2008/05/041
Abstract
We study the propagation of bubbles of new vacuum in a radially inhomogeneous Lemaitre-Tolman-Bondi background that includes a cosmological constant. This exemplifies the classical evolution of a tunneling bubble through a metastable state with curvature inhomogeneities, and will be relevant in the context of the Landscape. We demand that the matter profile in the LTB background satisfy the weak energy condition. For sample profiles that satisfy this restriction, we find that the evolution of the bubble (in terms of the physically relevant coordinates intrinsic to the shell) is largely unaffected by the prsence of local inhomogeneities. Our setup should also be a useful toy model for capturing the effects of ambient inhomogeneities on an inflating region.
31 pages, 21(!) figures, v2: minor changes, figures re-sized (might require zoom on some systems), references added
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Cited by in corpus (12)
- A status report on the observability of cosmic bubble collisions
- Emergent Universe by Tunneling
- Tunneling and propagation of vacuum bubbles on dynamical backgrounds
- Theta term in a bounded region
- Emergent Universe by Tunneling in a Jordan-Brans-Dicke Theory
- Initial Conditions for Bubble Universes
- Surviving in a Metastable de Sitter Space-Time
- Evolution of Vacuum Bubbles Embeded in Inhomogeneous Spacetimes
- Collapse of Vacuum Bubbles in a Vacuum
- Constraints on Metastable Dark Energy Decaying into Dark Matter
- Consistent Cosmic Bubble Embeddings
- On the fate of vacuum bubbles on matter backgrounds