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High Energy Physics - Theory

arXiv:0711.3417 (hep-th)
[Submitted on 21 Nov 2007 (v1), last revised 10 Apr 2008 (this version, v2)]

Title:Vacuum Bubble in an Inhomogeneous Cosmology

Authors:Willy Fischler, Chethan Krishnan, Sonia Paban, Marija Zanic
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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.
Comments: 31 pages, 21(!) figures, v2: minor changes, figures re-sized (might require zoom on some systems), references added
Subjects: High Energy Physics - Theory (hep-th); Astrophysics (astro-ph); High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:0711.3417 [hep-th]
  (or arXiv:0711.3417v2 [hep-th] for this version)
  https://doi.org/10.48550/arXiv.0711.3417
Journal reference: JHEP0805:041,2008
Related DOI: https://doi.org/10.1088/1126-6708/2008/05/041

Submission history

From: Chethan Krishnan [view email]
[v1] Wed, 21 Nov 2007 17:55:18 UTC (717 KB)
[v2] Thu, 10 Apr 2008 11:58:31 UTC (699 KB)
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